SCIENCE STRAND

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SCIENCE STRAND

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Title: SCIENCE STRAND

1
SCIENCE STRAND

PHYSICAL SCIENCE

Question How would you separate the salt from
water in a salt solution?

Question How would you separate the salt from
water in a salt solution?
Answer To separate mixtures use the difference
in physical properties of substances mixed. Salt
and water boil at different temperatures so
heating the solution until it boils will allow
the water to vaporize but the salt will remain
solid at that temperature.

Question Explain why defining a frame of
reference is important when describing motion.

Question Explain why defining a frame of
reference is important when describing motion.
Answer Because everything in the universe is in
motion, true absolute motion cannot be
determined, and only motion relative to a point
of reference can be determined.

Question Explain why it requires more force to
stop a heavy object in motion than a lighter
object moving at the same pace.

Question Explain why it requires more force to
stop a heavy object in motion than a lighter
object moving at the same pace.
Answer Force causes a mass to accelerate. Due
to inertia, the greater the mass of the object,
the greater the amount of force needed to move
the object or stop it from moving.

Question Describe gravity and how it affects
objects of different mass on Earth.

Question Describe gravity and how it affects
objects of different mass on Earth.
Answer Gravity is the attractive force that all
objects exert on each other. Gravitation between
objects increases as mass increases and as the
distance between the objects decreases.

Question What is sound?

Question What is sound?
Answer Sound is a vibration that moves through
matter as a wave.

Question Compare and contrast the movement of
sound through solids, liquids and gases (air)?

Question Compare and contrast the movement of
sound through solids, liquids and gases (air)?
Answer Sound is produced by vibrations of matter
and can move through all three states of matter.
The closer the particles in the matter, the
faster the sound will travel. Therefore, sound
travels fastest through solids and slowest in
air.
?

14
Sounds travel at different speeds through
different materials. Sound travels faster through
solids and liquids than gases. Sound is unable
to travel through a vacuum because there is no
matter to vibrate.
15

Question Which glass soda bottle in the
picture of bottles filled with various amounts
of water would have the highest pitch when
tapped? Explain your answer.

Question Which glass soda bottle in the picture
of bottles filled with various amounts of water
would have the highest pitch when tapped?
Explain your answer.
Answer Tapping the bottles
causes the glass of the bottle to
vibrate and produce sound. The
water dampens these vibrations.
So, the less water in the bottle, Click for
example.
the faster the bottle vibrates and the higher
the pitch.

Question Draw what a pencil looks like
partially submerged in a glass of water. What is
the distortion of the pencil image caused by?

Question Draw what a pencil looks like
partially submerged in a glass of water. What is
the distortion of the pencil image caused by?
Answer Light Refraction

SCIENCE GRADE 4
19

Question Explain why refraction occurs.

Question Explain why refraction occurs.
Answer The light that allows you to see the
pencil below the water must travel through the
water, the glass, and then the air to reach your
eyes. The light rays are bent as they move
through different matter and slowed so that they
reach your eyes slightly after the rays from the
pencil above the water. This time difference is
enough to distort the image.

Question Draw a diagram of light traveling
through a prism and explain why the light is
bending.

Question Draw a diagram of light traveling
through a prism and explain why the light is
bending.
Answer The prism causes the light to slow down.
Since the light enters it at an angle, this
causes the light to bend and
separate into the
different colors.

Question What are the colors of the visible
spectrum?

Question What are the colors of the visible
spectrum?
Answer ROY G. BIV
Red ? Blue
Orange ? Indigo
Yellow ? Violet
Green

Question What kind of clothing would keep you
the warmest on a cold day? Explain your answer.

Question What kind of clothing would keep you
the warmest on a cold day? Explain your answer.
Answer a hat a scarf or knit mask to cover face
and mouth mittens/gloves several layers of
loose-fitting clothing. These all act as
insulators to trap heat that the body produces.

Question Explain how you could use a circuit to
test for conductors and insulators.

Question Explain how you could use a circuit to
test for conductors and insulators.
Answer Conductors are materials that conduct
electricity. Insulators are materials that do not
conduct electricity. Make a circuit with a light
bulb in which different materials can be placed
to test their conductivities. A conductor will
form a complete circuit and light the bulb. An
insulator will form an incomplete circuit, and
the bulb will not light.

Question Explain how electricity powers a light
bulb and produces light.

Question Explain how electricity powers a light
bulb and produces light.
Answer Electrical energy passes through the
filament in the bulb
making it hot. This
makes the filament
glow and produce
light.

SCIENCE GRADE 4
31

Question Given the following list of materials,
identify the items as electrical
insulators/conductors, magnet/non-magnetic, and
good/fair/poor heat conductor.
Rubber
Copper
Paper
Tap water
Styrofoam
Wood
Iron

Question Given the following list of materials,
identify the items as electrical
insulators/conductors, magnet/non-magnetic, and
good/fair/poor heat conductor.
Answer
Rubber- insulator non-magnetic poor conductor
Copper- conductor non-magnetic good conductor
Paper- insulator non-magnetic poor conductor
Tap water- conductor non-magnetic fair
conductor
Styrofoam- insulator non-magnetic poor
conductor
Wood- insulator non-magnetic poor conductor
Iron- conductor magnetic good conductor

Question Explain how electricity has influenced
society.

SCIENCE GRADE 4
34

Question Explain how electricity has influenced
society.
Answer The generation of large amounts of
electricity and the development of reliable
delivery systems changed the world. Once
electricity was cheap and reliable, other
inventions followed. Availability of electricity
led to widespread use of electric appliances,
some of which we still use today. Electricity
was everywhere and it was changing the way people
lived.

Question What does the graph indicate about the
speed of the car?

Question What does the graph indicate about the
speed of the car?
Answer The car was traveling at a constant
speed of 20 km/hr.

Question Identify 3 different forms of energy

Question Identify 3 different forms of energy
Answer sound, heat, light, ultraviolet,
electrical

Question Describe 3 basic energy
transformations. Include one transformation that
involves friction.

Question Describe 3 basic energy
transformations. Include one transformation that
involves friction.
Answer Examples from light to heat, from
potential to kinetic, from electrical to heat and
light, from chemical to electrical.
The flow of electricity produces heat due to
friction.

Question Identify a force that causes an object
to move. What determines the direction and amount
of movement.

Question Identify a force that causes an object
to move. What determines the direction and amount
of movement.
Answer A push or pull is a force that causes an
object to move. The direction and amount of
movement are determined by the total amount of
the net force.

Question Differentiate between the weight and
mass of objects.

Question Differentiate between the weight and
mass of objects.
Answer Mass is the amount of matter or stuff
in an object and is not affected by gravity. The
weight of an object is determined by both mass
and the force of gravity on that object.

Question Explain how water changes from solid
to liquid to gas.

Question Explain how water changes from solid
to liquid to gas.
Answer As the water is heated, the molecules
move faster and move apart from each other to
form a liquid. As heating continues the molecules
move even faster and farther apart to form a gas.

Question Identify the three states of matter
and describe how molecules move through each
state (for example, water).

Question Identify the three states of matter
and describe how molecules move through each
state (for example, water).
Answer The three states of matter are solid,
liquid and gas. In a solid the particles move the
slowest and vibrate in fixed positions. In a
liquid the particles move faster and slide past
each other. The particles of a gas move very fast
and bounce off of each other causing them to
spread apart from each other.

49
SCIENCE STRAND

EARTH AND SPACE SCIENCE

Question Explain the difference between weather
and climate.

Question Explain the difference between weather
and climate.
Answer Weather is the state of the atmosphere at
a particular time and place with respect to
temperature, moisture, wind velocity, and
barometric pressure. Climate is the average
weather conditions in a given area over time.

Question Explain how climate is affected by
bodies of water, landforms and latitude.

Question Explain how climate is affected by
bodies of water, landforms and latitude.
Answer Climate varies widely from location to
location on Earth because the sun's heat is not
distributed evenly over the entire planet for the
following reasons
distance from the equator (equator is warmer)
large bodies of water (oceans and lakes absorb
and store large amounts of heat that winds then
carry to nearby land masses, resulting in a
warmer climate and higher annual rain and
snowfall)
elevation, or height above sea level-the higher
the elevation, the cooler the climate.

Question Use the weather forecast
from a newspaper to describe the weather on
Saturday, July 14.

Question Use the weather forecast
from a newspaper to describe the weather on
Saturday, July 14.
Answer Weather on July 14 will be partly cloudy
with high temperatures of about 110 and lows
about 84. Humidity will be low (10).

Question Explain the terms runoff and
groundwater.

Question Explain the terms runoff and
groundwater.
Answer
Runoff- Rainfall not absorbed by soil.
Groundwater- Water that collects or flows beneath
the Earth's surface, filling the porous spaces in
soil, sediment, and rocks. Groundwater originates
from rain and from melting snow and ice and is
the source of water for aquifers, springs, and
wells. The upper surface of groundwater is the
water table.

Question List safety measures to prepare for a
hurricane.

Question List safety measures to prepare for a
hurricane.
Answer Have a disaster plan. Have a pet plan.
Board up windows. Bring in outdoor objects that
could blow away. Know the evacuation routes.
Prepare a disaster supplies kit for your home and
car. Have enough food and water for at least 3
days. Include a first aid kit, canned food and a
can opener, bottled water, battery-operated
radio, batteries, flashlight, protective clothing
and written instructions on how to turn off
electricity, gas, and water. Have cash handy.
Make sure your car is filled with gasoline.

Question Identify components of the Earths
crust.

Question Identify components of the Earths
crust.
Answer
rocks,
minerals,
soil

SCIENCE GRADE 4
62

Question List 2 slow processes that change the
Earths processes.

Question List 2 slow processes that change the
Earths processes.
Answer Answers will vary weathering, erosion,
transforming of rocks in the rock cycle, mountain
building

Question List 2 rapid processes that change the
Earths crust.

Question List 2 rapid processes that change the
Earths crust.
Answer Answers will
vary volcanic eruptions,
tsunamis, floods,
earthquakes.

Question Explain the difference between
weathering and erosion.

Question Explain the difference between
weathering and erosion.
Answer Many people confuse weathering and
erosion. When some thing is weathered it is
broken down into
smaller pieces, but when
something is eroded it
is carried away.

Question Explain how some common rocks are used.

Question Explain how some common rocks are
used.
Answer We use rocks for roads, metals, jewelry,
tombstones, building materials, cosmetics, and
many, many more things. Most of the famous
sculptures of the world are made from blocks of
stones such as granite and marble.

Question Explain how can the age of rock layers
be deduced from fossils?

Question Explain how can the age of rock layers
be deduced from fossils?
Answer If a fossil of known age is found in a
rock layer, it tells us when the
rock was formed.
The rock has the same
age as the fossil.

Question Describe the organic and inorganic
components of soil.

Question Describe the organic and inorganic
components of soil.
Answer Inorganic water, air, minerals
Organic living or once living

Question List the three particle sizes found in
soil from largest to smallest.

Question List the three particle sizes found in
soil from largest to smallest.
Answer sand (largest), silt, clay (smallest)

Question As particles settle, which size settles
first, and which settles last.

Question As particles settle, which size settles
first, and which settles last.
Answer sand settles first, then silt and finally
clay

Question Define soil permeability and rank the
particle sizes (sand, silt, clay) by increasing
permeability.

Question Define soil permeability and rank the
particle sizes (sand, silt, clay) by increasing
permeability.
Answer Soil permeability is the ability of water
to flow through a soil. Sand is the most
permeable due to the large particle size and
space between the particles. Silt ranks second in
permeability, and clay is the least permeable
because it has the least pore space.

Question Label a diagram of the earths orbit
showing the correct locations of the earth at the
beginning of each season in the Northern
Hemisphere.

Question Label a diagram of the Earths orbit
showing the correct locations of the Earth at the
beginning of each season in the Northern
Hemisphere.
Answer

Question Explain how the Earths location in
its orbit and the tilt of the Earth create the
seasons.

Question Explain how the Earths location in
its orbit and the tilt of the Earth create the
seasons.
Answer N Hem tilted toward sun summer, away
from sun winter, Not tilted toward or away
fall or spring
SEE NEXT PAGE ?

The Earth is tilted and direct light causes more
heat than indirect light.
When the Northern hemisphere is pointing at the
sun, sunlight falls most directly on it. This is
summer in the Northern Hemisphere. As the Earth
moves around to the other side of the Sun the
Northern Hemisphere is tilted away from the Sun.
Now the light falls indirectly on it. It is
winter.
The exact opposite is happening in the Southern
hemisphere. When the Northern Hemisphere has
summer, the Southern Hemisphere has winter, and
the other way round.

Question Explain why the sun is important to
Earth systems.

Question Explain why the sun is important to
Earth systems.
Answer The Sun provides Earth with vast amounts
of energy every day. The water cycle is fueled by
the sun. Plants use the Suns energy to make
food, and plants provide food for other
organisms. The Suns energy also creates wind in
Earths atmosphere. This wind can be harnessed
and used to produce power.

Question Explain why the sun appears to move
across the sky.

Question Explain why the sun appears to move
across the sky.
Answer The sun appears to move around the earth
every day because the earth rotates around its
own axis every day. This makes the sun appear to
rise in the east and set in the west.

Question Sequence the Moon phases waxing
gibbous, waxing crescent, full moon, last
quarter, new moon, waning crescent, first
quarter, and waning gibbous.

Question Sequence the Moon phases waxing
gibbous, waxing crescent, full moon, last
quarter, new moon, waning crescent, first
quarter, and waning gibbous.
Answer

Question Label appropriate diagrams
illustrating the lunar eclipse and solar eclipse.

Question Label appropriate diagrams
illustrating the lunar eclipse and solar eclipse.
Answer

Lunar Eclipse
Solar Eclipse
93

Question What is the order of the planets from
the sun?

Question What is the order of the planets from
the sun?
Answer My Very Educated Mother Just
Served Us Nine Pizzas.
Mercury Jupiter
Venus Saturn
Earth Uranus
Mars Neptune
Pluto (no longer classified
as a planet)

Question Describe characteristics of the outer
and inner planets.

Question Describe characteristics of the outer
and inner planets.
Answer The inner planets are Mercury, Venus,
Earth and Mars. The inner planets are the
smallest planets of the solar system and have a
rocky composition- the terrestrial planets.
Beyond Mars lies the Asteroid belt that separates
the inner planets from the outer planets.
The outer planets are Jupiter, Saturn, Uranus
and Neptune. These are the Jovian planets or the
gas giants. The outer planets are the largest in
the solar system and made mostly of gas.

Question How has technology improved our
knowledge of the universe?

Question How has technology improved our
knowledge of the universe?
Answer Advances in different types of telescopes
and satellites have allowed scientists to learn
more about the universe. Technologies developed
for space exploration have also increased our
knowledge of the universe.

Question Draw, label, and explain the
components of a water cycle.

100

Question Draw, label, and explain the
components of a water cycle.
Answer
1. The energy from
the sun fuels the
water cycle.

101

Question Draw, label, and explain the
components of a water cycle.
Answer
2. Water vaporizes
into the
atmosphere.

102

Question Draw, label, and explain the
components of a water cycle.
Answer
3. Water vapor
condenses
around
particles
in the air forming
clouds.

103

Question Draw, label, and explain the
components of a water cycle.
Answer
Water precipitates
from the condensed
water in clouds and
falls to the earth in
the form of rain,
snow, sleet or hail.

104

Question Draw, label, and explain the
components of a water cycle.
Answer
5. Surface water
collects in
streams and
rivers and flows
to lakes and

oceans.

105

Question Distinguish between Earths revolution
around the Sun and Earths rotation on its axis.

106

Question Distinguish between Earths revolution
around the Sun and Earths rotation on its axis.
Answer Revolution the movement of the earth
around the sun in a year
Rotation the spinning of earth on its own axis
in a day

107
SCIENCE STRAND

LIFE SCIENCE

108

Question Explain the function of each of the
following parts of a plant stems, roots,
leaves, flowers, and seeds

109

Question Explain the function of each of the
following parts of a plant stems, roots,
leaves, flowers, and seeds
Answer Stem provides
support and contains tissues to
transport materials to and from
other parts of the plant
Roots take in water for the plant
and anchor the plant
Leaves the site of photosynthesis for the plant
Flowers produce seeds, attract
insects for pollination
Seeds produce new plant

110

Question Sequence the stages in the life of a
butterfly and a frog.

111

Answer

112

Question Explain how plants produce their own
food.

113

Question Explain how plants produce their own
food.
Answer Plants take in energy from the sun and
produce food to store the energy. This occurs in
the chloroplasts of plant cells which contain the
pigment chlorophyll.

114

Question What are the raw materials and what
are the products of photosynthesis?

115

Question What are the raw materials and what
are the products of photosynthesis?
Answer In photosynthesis, the following
occurs
Carbon dioxide water glucose oxygen
So the products and materials are

Raw Materials Products
Carbon dioxide Water Glucose (sugar) Oxygen
116

Question Why are green plants so important to
an ecosystem?

117

Question Why are green plants so important to
an ecosystem?
Answer Green plants are the producers of an
ecosystem. They make their own food by
photosynthesis using the suns energy. Consumers
are animals and they get their energy from the
producers or from organisms that eat producers.

118

Question Describe several adaptive structures
and explain why they are effective.

119

Question Describe several adaptive structures
and explain why they are effective.
Answer Adaptive structures include thick, waxy
surface on the leaves to slow water loss slits
in the rim allowing water to drain off razor
sharp spines or thorns to protect it from
predators very tall plants competing with one
another to reach the sunlight vines crawling up
tree trunks to reach sunlight plants with very
big leaves to trap sunlight for photosynthesis
geotropism, or the roots of plants detecting
gravity to grow downward phototropism, or the
ability of plants to grow toward the sun

120

Question List plant parts that we eat as food
and identify them as stem, leaf, flower, root,
seeds, or fruit.

121

Question List plant parts that we eat as food
and identify them as stem, leaf, flower, root,
seeds, or fruit.
Answer

122

Question Label the parts of a flower and
explain the function of each part.

123

Question Label the parts of a flower and
explain the function of each part.
Answer

124

Question Explain how to grow a potato without a
seed.

125

Question Explain how to grow a potato without a
seed.
Answer Potatoes can be grown from eyes that
they produce. Simply cut potatoes into pieces
making sure each piece contains a prominent bud
or "eye". Plant potato pieces into the prepared
soil at 10 to 12 inch spacing.

126

Question Compare two methods of plant
reproduction and explain which method produces a
new individual and which produces new growth of
the established individual.

127

Question Compare two methods of plant
reproduction and explain which method produces a
new individual and which produces new growth of
the established individual.
Answer Plants can be grown from seeds which will
produce new plants that are different from the
parents. Plants can also be grown from cuttings
which produces plants identical to the parent
plant.

128

Question Explain how behavioral adaptations can
allow animals to be better suited for their
environment.

129

Question Explain how behavioral adaptations can
allow animals to be better suited for their
environment.
Answer If the animal acts a certain way that
increases their chances of survival, it is called
a BEHAVIORAL ADAPTATION. Some animals play dead
in order to trick predators and when the predator
slow down its attack, the animal can get away.
Migration is a behavioral adaptation - without
it, many animals would freeze to death in the
winter.

130

Question Label a diagram of the respiratory
system.

131
DAILY DO NOW

Question Label a diagram of the respiratory
system.
Answer

SCIENCE GRADE 4
132

Question Label a diagram of the circulatory
system.

133

Question Label a diagram
of the circulatory system.
Answer

134

Question Find the total number of calories in
the entire can of carrots based on the
food label.

135

Question Find the origins of
the ingredients that made up
the food label.
Answer Each can has 2.5
servings with each serving
having 45 calories.
2.5 x 45 112.5

136

Question Use the new USDA food pyramid and
describe a balanced meal.

137

Question Use the new USDA food pyramid and
describe a balanced meal.
Answer A balanced meal is obtained by eating a
variety of the foods from each of the five food
groups each day grains, vegetables, fruits,
dairy, meat and beans

SCIENCE GRADE 4
138

Question Explain the bodys need for the
following nutrients fats, carbohydrates, and
proteins.

139

Question Explain the bodys need for the
following nutrients fats, carbohydrates, and
proteins.
Answer Carbohydrates give you energy for work
and play. Fat is used to cushion organs, to
insulate against heat, and to store energy. Fat
in the diet provides energy and fat soluble
vitamins. Protein provides energy, builds
muscles, builds and repairs cells, and regulates
bodily functions.

140

Question Explain the adaptive behavior of a
vine climbing up a wall in terms of the
requirements necessary for photosynthesis.

141

Question Explain the adaptive behavior of a
vine climbing up a wall in terms of the
requirements necessary for photosynthesis.
Answer Some plants can climb
up closer to the top of the
canopy where there is more
light. Some develop tendrils or
hook-like structures to hold on
to the wall.

142

Question Explain the function of the roots,
leaves, and stem in the process of photosynthesis.

143

Question Explain the function of the roots,
leaves, and stem in the process of
photosynthesis.
Answer
Roots- bring in water and minerals from the soil
Stem- helps transport water, minerals, food
through the plant
Leaves- place where the plants make glucose
(food).

144
SCIENCE STRAND

SCIENCE OF THE ENVIRONMENT

145

Question Discuss how carrying capacity affects
an ecosystem.

146

Question Discuss how carrying capacity affects
an ecosystem.
Answer Carrying capacity is the number of
individuals an environment can support without
negative impacts to the ecosystem. An ecosystem's
carrying capacity is determined by the
availability of resources such as space,
nutrients, water and light. Interactions between
organisms often determine who will be successful
in obtaining resources and who will survive.

147

Question Classify common products as being made
from renewable or non-renewable resources.

148

Question Classify common products as being made
from renewable or non-renewable resources.
Answer Renewable resources include items such as
wood, paper, oxygen, fresh water, leather, and
alcohol and oils from plants and seeds that can
used fuels. Gasoline, coal, natural gas, diesel
and other products derived from fossil fuels are
non-renewable. Metal ores are used to produce
iron, aluminum or copper based products which are
also non-renewable.

149

Question How do human populations alter natural
habitats?

150

Question How do human populations alter natural
habitats?
Answer Human activity causes air and water
pollution. Building homes, roads and other
structures also destroy habitats where plants and
animals live.

151

Question Describe several strategies for
preserving habitats.

152

Question Describe several strategies for
preserving habitats.
Answer Areas can be designated as preserves or
sanctuaries. Guidelines, education, and laws can
help prevent pollution. Conserving and recycling
will help save resources and habitats.

153

Question Describe several strategies for
recovering damaged habitats.

154

Question Describe several strategies for
recovering damaged habitats.
Answer Allow forests to re-grow clean up
rivers, lakes and seas and help to protect what
still remains.

155

Question Describe the recovery of an endangered
species population in Louisiana.

156

Question Describe the recovery of an endangered
species population in Louisiana.
Answer The Louisiana Brown Pelican was put on
the Endangered Species list in 1970. The
pesticide DDT and habitat loss had almost wiped
out the pelicans in Louisiana. Conservation
efforts and the ban of DDT has allowed the
pelican population to grow and they have just
been removed from the endangered species list.

157

Question Describe the damage an oil spill has
on a natural habitat and effective clean up
procedures.

158

Question Describe the damage an oil spill has
on a natural habitat and effective clean up
procedures.
Answer Oil spills can affect all the organisms
in a food chain. Birds die from oil spills if
their feathers are covered in oil. The bird can
be poisoned because it tries to clean itself.
Animals may die because they get hypothermia,
causing their body temperature to be too low, or
they ingest the oil. ?

159

Workers can place a boom around the spilled oil
which collect the oil off the water. The workers
can also use skimmers. Skimmers are boats that
can remove the oil off the water. They also can
burn freshly spilled oil with fireproof booms to
contain the oil. There are just a few ways to
clean the oil off the beaches. Workers can use
high or low pressure hoses to spray the oil that
is on the beaches. Vacuum trucks may be driven on
the beaches to vacuum up the oil.

160

Question List the living and non-living
components of a crawfish ecosystem.

161

Question List the living and non-living
components of a crawfish ecosystem.
Answer

LIVING NON-LIVING
PLANTS ANIMALS WATER SUNLIGHT TEMPERATURE SOIL, SAND, ROCKS
162

Question Describe how producers and consumers
obtain food.

163

Question Describe how producers and consumers
obtain food.
Answer
Producers make their own food by photosynthesis.
Consumers feed on producers or other consumers.

164

Question Classify consumers as herbivores,
carnivores, omnivores, and decomposers and
explain the role of each in a food web.

165

Question Classify consumers as herbivores,
carnivores, omnivores, and decomposers and
explain the role of each in a food web.
Answer
Herbivores-eat plants cows, zebra, rabbits
Carnivores-eat animal flesh lions, tigers,
sharks
Omnivores-eat both plants and animals bears,
raccoons
Decomposers-break down dead plants and animals
mushrooms, bacteria

166

Question Draw a diagram of a food web.
Identify the producers and the consumers.

167

Question Draw a diagram of a food web. Identify
the producers
and the consumers.
Answer
Producers
All the other organisms
are consumers.

168

Question Explain the difference between a food
web and a food chain.

169

Question Explain the difference between a food
web and a food chain.
Answer Food chains follow a single path as
animals eat each other. Food webs show how many
animals are interconnected by different paths.

170

Question Where does the energy in a food web
come from?

171

Question Where does the energy in a food web
come from?
Answer Since the plants are the producers for a
food web, the energy in a food web ultimately
comes from the sun.

172

Question Explain why many Louisiana animals and
plants are endangered or have become extinct.

173

Question Explain why many Louisiana animals and
plants are endangered or have become extinct.
Answer Many animals and plants in Louisiana have
become endangered or extinct due to habitat loss
or destruction or over hunting.

174

Question Describe methods taken to protect
wildlife.

175

Question Describe methods taken to protect
wildlife.
Answer Wildlife can be protected by forming
protected areas for them to live in or by
limiting hunting or ownership of the animals.

176

Question Identify an appropriate habitat for
each organism cypress tree, lion, earthworm.

177

Question Identify an appropriate habitat for
each. organism cypress tree, lion, earthworm.
Answer
Cypress tree- wetlands
Lion- grasslands
Earthworm- in the topsoil

178

Question Given a number of organisms identify
an appropriate habitat for each.
Cactus
Whale
Polar bear
Alligator
Turtle

179

Question Given a number of organisms identify
an appropriate habitat for each.
Answer
Cactus- desert
Whale- ocean
Polar bear- Arctic
Alligator- wetlands (swamps, marshes)
Turtle- streams, rivers, ponds

180

Question Give an example of each of the
following types of organisms herbivores,
carnivores, decomposers, scavengers, producers,
consumers.

181

Question Give an example of each of the
following types of organisms herbivores,
carnivores, decomposers, scavengers, producers,
consumers.
Answer Answers will vary.

182
SCIENCE STRAND

SCIENCE OF INQUIRY

183

Question Why do scientists repeat experiments?

184

Question Why do scientists repeat experiments?
Answer Repeated trials serve to validate the
findings of an experiment.

185

Question Select the appropriate tools and units
of measurement to find mass.

186

Question Select the appropriate tools and units
of measurement to find mass.
Answer
Tool balance
Unit of Measure gram

187

Question How would you measure the mass and
volume of an irregular object like a rock?

188

Question How would you measure the mass and
volume of an irregular object like a rock?

Answer The volume of a rock can be measured by
placing the rock in a container full to the brim
of water. The overflow will equal the volume of
the rock.
?

189

Question How would you measure the mass and
volume of an irregular object like a rock?

? Answer The mass of a rock can be measured by
a balance scale. On one side of the balance
place the rock and on the other side of the
balance place a know mass that balances the scale.
SCIENCE GRADE 4

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