Physical Science Assessment Items

1
Physical Science Assessment Items

• Aligned to standards

2

• A regional manager is concerned about the number
  of employee accidents occurring at his ten
  service centers. She makes a hypothesis that
  safety advertising will reduce accidents. She
  decides to test the hypothesis in her service
  centers. Each service center will use different
  number of safety posters to see if the number of
  accidents will reduce. Each service center
  manager will keep a record of the employee
  accidents reported.
• How is safety advertising measured in this study?
• number of employee accidents reported to the
  service center manager
• number of service centers involved
• number of safety posters in each service center
• number of accidents in the service center

3

• A regional manager is concerned about the number
  of employee accidents occurring at his ten
  service centers. She makes a hypothesis that
  safety advertising will reduce accidents. She
  decides to test the hypothesis in her service
  centers. Each service center will use different
  number of safety posters to see if the number of
  accidents will reduce. Each service center
  manager will keep a record of the employee
  accidents reported.
• How is safety advertising measured in this study?
• number of employee accidents reported to the
  service center manager
• number of service centers involved
• number of safety posters in each service center
• number of accidents in the service center

4
A regional manager is concerned about the number
of employee accidents occurring at his ten
service centers. She makes a hypothesis that
safety advertising will reduce accidents. She
decides to test the hypothesis in her service
centers. Each service center will use different
number of safety posters to see if the number of
accidents will reduce. Each service center
manager will keep a record of the employee
accidents reported. How are the employee
accidents measured in this study? a. number of
employee accidents reported to the service center
manager b. number of service centers
involved c. number of safety posters in each
service center d. number of accidents in each
service center
5
A regional manager is concerned about the number
of employee accidents occurring at his ten
service centers. She makes a hypothesis that
safety advertising will reduce accidents. She
decides to test the hypothesis in her service
centers. Each service center will use different
number of safety posters to see if the number of
accidents will reduce. Each service center
manager will keep a record of the employee
accidents reported. How are the employee
accidents measured in this study? a. number of
employee accidents reported to the service center
manager b. number of service centers
involved c. number of safety posters in each
service center d. number of accidents in each
service center
6
Jasmine has been launching water rockets. She can
vary the amount of water in the rocket and the
launching angle of the rocket. She can also
change the weight of the rocket by adding sand to
the nose cone. She is curious about the factors
which affect of the height to which the rocket
will rise. Which of the following is a
hypothesis she could test? a. Rockets using warm
water will rise higher than rockets with cold
water. b. Rockets using five tail fins will rise
higher than rockets with four tail fins. c.
Rockets with a pointed nose cone will rise higher
than rockets with a rounded nose cone. d. Rockets
using more water will rise higher than rockets
with less water.
7
Jasmine has been launching water rockets. She can
vary the amount of water in the rocket and the
launching angle of the rocket. She can also
change the weight of the rocket by adding sand to
the nose cone. She is curious about the factors
which affect of the height to which the rocket
will rise. Which of the following is a
hypothesis she could test? a. Rockets using warm
water will rise higher than rockets with cold
water. b. Rockets using five tail fins will rise
higher than rockets with four tail fins. c.
Rockets with a pointed nose cone will rise higher
than rockets with a rounded nose cone. d. Rockets
using more water will rise higher than rockets
with less water.
8
The monthly heating bill for the Smiths is higher
than all their neighbors. They formulate
hypotheses about factors that affect their
heating bill. Which of the following statements
is NOT a hypothesis which they could test? a. The
greater the number of trees around the house, the
lower the heating bill. b. The fewer number of
doors and windows in a house the lower the
heating bill. c. The larger the house the larger
the heating bill. d. The higher the heating bill,
the more likely a family will seek cheaper
heating methods.
9
The monthly heating bill for the Smiths is higher
than all their neighbors. They formulate
hypotheses about factors that affect their
heating bill. Which of the following statements
is NOT a hypothesis which they could test? a. The
greater the number of trees around the house, the
lower the heating bill. b. The fewer number of
doors and windows in a house the lower the
heating bill. c. The larger the house the larger
the heating bill. d. The higher the heating bill,
the more likely a family will seek cheaper
heating methods.
10
A high school environmental science class studies
factors that might affect pollution in the Reedy
River. They discover that possible factors may
include fertilizers, sewage, and trash from a
landfill. Chemicals in that portion of the river
are not a problem because there are no chemical
plants upstream. Which of the following is a
testable hypothesis? a. The more fertilizer in
the river, the more crops will grow along the
river. b. The more chemical plants there are, the
more chemical pollution that results. c. The more
trash sent to the landfill, the higher the income
of families in the region. d. The more sewage in
the river, the greater the level of pollution.
11
A high school environmental science class studies
factors that might affect pollution in the Reedy
River. They discover that possible factors may
include fertilizers, sewage, and trash from a
landfill. Chemicals in that portion of the river
are not a problem because there are no chemical
plants upstream. Which of the following is a
testable hypothesis? a. The more fertilizer in
the river, the more crops will grow along the
river. b. The more chemical plants there are, the
more chemical pollution that results. c. The more
trash sent to the landfill, the higher the income
of families in the region. d. The more sewage in
the river, the greater the level of pollution.
12
Chickens lay varying numbers of eggs depending
upon several factors. Which of the following is
NOT a suitable testable hypothesis for a study of
these factors? a. Chickens exposed to more hours
of light will lay more eggs. b. Chickens which
produce more eggs seem to lose weight. c.
Chickens in larger cages produce more eggs. d.
Chickens with more protein in their feed produce
more eggs.
13
Chickens lay varying numbers of eggs depending
upon several factors. Which of the following is
NOT a suitable testable hypothesis for a study of
these factors? a. Chickens exposed to more hours
of light will lay more eggs. b. Chickens which
produce more eggs seem to lose weight. c.
Chickens in larger cages produce more eggs. d.
Chickens with more protein in their feed produce
more eggs.
14
Henry was curious to see how light affects the
growth of bread mold. He grew bread mold in
fifteen identical containers containing the same
amount and type of nutrients. Five containers
were kept in total darkness, five were kept in
half darkness and half light, and five were in a
continually lighted condition. At the end of four
days the containers were examined and the growth
of the mold was measured and recorded. Which of
the following is Henrys hypothesis? a. The type
of nutrient used will vary the amount of bread
mold. b. The more light withheld from the bread
mold, the greater the amount of bread mold. c.
The amount of nutrient used will vary the amount
of bread mold. d. The greater the number of
containers, the greater the amount of bread mold.
15
Henry was curious to see how light affects the
growth of bread mold. He grew bread mold in
fifteen identical containers containing the same
amount and type of nutrients. Five containers
were kept in total darkness, five were kept in
half darkness and half light, and five were in a
continually lighted condition. At the end of four
days the containers were examined and the growth
of the mold was measured and recorded. Which of
the following is Henrys hypothesis? a. The type
of nutrient used will vary the amount of bread
mold. b. The more light withheld from the bread
mold, the greater the amount of bread mold. c.
The amount of nutrient used will vary the amount
of bread mold. d. The greater the number of
containers, the greater the amount of bread mold.
16
Henry was curious to see how light affects the
growth of bread mold. He grew bread mold in
fifteen identical containers containing the same
amount and type of nutrients. Five containers
were kept in total darkness, five were kept in
half darkness and half light, and five were in a
continually lighted condition. At the end of four
days the containers were examined and the growth
of the mold was measured and recorded. Which of
the following is the controlled variable? a. the
amount of light exposed to the containers b. the
style of container used c. the temperature of the
bread mold d. the quantity of bread mold
17
Henry was curious to see how light affects the
growth of bread mold. He grew bread mold in
fifteen identical containers containing the same
amount and type of nutrients. Five containers
were kept in total darkness, five were kept in
half darkness and half light, and five were in a
continually lighted condition. At the end of four
days the containers were examined and the growth
of the mold was measured and recorded. Which of
the following is the controlled variable? a. the
amount of light exposed to the containers b. the
style of container used c. the temperature of the
bread mold d. the quantity of bread mold
18
Henry was curious to see how light affects the
growth of bread mold. He grew bread mold in
fifteen identical containers containing the same
amount and type of nutrients. Five containers
were kept in total darkness, five were kept in
half darkness and half light, and five were in a
continually lighted condition. At the end of four
days the containers were examined and the growth
of the mold was measured and recorded. Which of
the following is the dependent or responding
variable? a. the growth of the bread mold b. the
quantity of nutrient in each container c. the
amount of light exposed to each of the
containers d. the number of containers used.
19
Henry was curious to see how light affects the
growth of bread mold. He grew bread mold in
fifteen identical containers containing the same
amount and type of nutrients. Five containers
were kept in total darkness, five were kept in
half darkness and half light, and five were in a
continually lighted condition. At the end of four
days the containers were examined and the growth
of the mold was measured and recorded. Which of
the following is the dependent or responding
variable? a. the growth of the bread mold b. the
quantity of nutrient in each container c. the
amount of light exposed to each of the
containers d. the number of containers used.
20
Henry was curious to see how light affects the
growth of bread mold. He grew bread mold in
fifteen identical containers containing the same
amount and type of nutrients. Five containers
were kept in total darkness, five were kept in
half darkness and half light, and five were in a
continually lighted condition. At the end of four
days the containers were examined and the growth
of the mold was measured and recorded. Which is
the independent or manipulated variable? a. the
amount of light exposed to each of the
containers b. the quantity of nutrient in each
container c. the growth of the bread mold d. the
number of containers for each experimental area
21
Henry was curious to see how light affects the
growth of bread mold. He grew bread mold in
fifteen identical containers containing the same
amount and type of nutrients. Five containers
were kept in total darkness, five were kept in
half darkness and half light, and five were in a
continually lighted condition. At the end of four
days the containers were examined and the growth
of the mold was measured and recorded. Which is
the independent or manipulated variable? a. the
amount of light exposed to each of the
containers b. the quantity of nutrient in each
container c. the growth of the bread mold d. the
number of containers for each experimental area
22
John wanted to find out which type of toothpaste
was best at fighting bacteria. On an agar plate
inoculated with bacteria, he placed 1 cm. of
three different types of toothpaste. What is the
dependent variable in Johns experiment? a. the
amount of bacterial growth b. the different kinds
of toothpaste c. the types of bacteria d. the
amount of toothpaste
23
John wanted to find out which type of toothpaste
was best at fighting bacteria. On an agar plate
inoculated with bacteria, he placed 1 cm. of
three different types of toothpaste. What is the
dependent variable in Johns experiment? a. the
amount of bacterial growth b. the different kinds
of toothpaste c. the types of bacteria d. the
amount of toothpaste
24
Shawn wonders about the things that may affect
the time it takes ice cubes to melt. He
formulates a hypothesis that the shape of the ice
cube affects the time it takes to melt ice cubes.
Shawn believes that the size of the ice cubes
and the temperature of the environment are
factors which may also affect the time it takes
ice cubes to melt. Which of the following would
be the BEST method Shawn could use to test his
hypothesis? a. Use five ice cubes of the same
shape and size. Use five identical containers of
the same temperature. Measure the time it takes
each cube to melt. b. Use five ice cubes of the
same shape and each having a different size. Use
five identical containers of the same
temperature. Measure the time it takes each cube
to melt. c. Use five ice cubes of the same size,
but each having a different shape. Use five
containers of the same temperature. Measure the
time it takes each cube to melt. d. Use five ice
cubes of the same size, but each having a
different shape. Use five containers, each at a
different temperature. Measure the time it takes
each cube to melt.
25
Shawn wonders about the things that may affect
the time it takes ice cubes to melt. He
formulates a hypothesis that the shape of the ice
cube affects the time it takes to melt ice cubes.
Shawn believes that the size of the ice cubes
and the temperature of the environment are
factors which may also affect the time it takes
ice cubes to melt. Which of the following would
be the BEST method Shawn could use to test his
hypothesis? a. Use five ice cubes of the same
shape and size. Use five identical containers of
the same temperature. Measure the time it takes
each cube to melt. b. Use five ice cubes of the
same shape and each having a different size. Use
five identical containers of the same
temperature. Measure the time it takes each cube
to melt. c. Use five ice cubes of the same size,
but each having a different shape. Use five
containers of the same temperature. Measure the
time it takes each cube to melt. d. Use five ice
cubes of the same size, but each having a
different shape. Use five containers, each at a
different temperature. Measure the time it takes
each cube to melt.
26
Thomas wanted to test the hypothesis that the
higher the temperature of the water, the faster
the sugar would dissolve. Which of the following
would BEST test his hypothesis? a. Use four
beakers of water Beaker 1 at 20oC, Beaker 2 at
40oC, Beaker 3 at 60oC, and Beaker 4 at 80oC.
Add one teaspoon of sugar to each beaker and
measure the time it takes to dissolve. b. Use two
beakers of water Beaker 1 at 20oC, Beaker 2 at
30oC. Add one teaspoon of sugar to each beaker
and measure the time it takes to dissolve. c. Use
three beakers of water, all at the same
temperature. Add one teaspoon of sugar to each
beaker. Heat Beaker 1 over low heat. Heat Beaker
2 over high heat. Allow Beaker 3 to remain at
room temperature unheated. Measure the time it
takes for each to dissolve. d. Use four beakers
of water Add 1 teaspoon of sugar to Beaker 1.
Add 2 teaspoons of sugar to Beaker 2. Add 3
teaspoons to Beaker 3. Add 4 teaspoons of sugar
to Beaker 4. Measure the time it takes for each
to dissolve.
27
Thomas wanted to test the hypothesis that the
higher the temperature of the water, the faster
the sugar would dissolve. Which of the following
would BEST test his hypothesis? a. Use four
beakers of water Beaker 1 at 20oC, Beaker 2 at
40oC, Beaker 3 at 60oC, and Beaker 4 at 80oC.
Add one teaspoon of sugar to each beaker and
measure the time it takes to dissolve. b. Use two
beakers of water Beaker 1 at 20oC, Beaker 2 at
30oC. Add one teaspoon of sugar to each beaker
and measure the time it takes to dissolve. c. Use
three beakers of water, all at the same
temperature. Add one teaspoon of sugar to each
beaker. Heat Beaker 1 over low heat. Heat Beaker
2 over high heat. Allow Beaker 3 to remain at
room temperature unheated. Measure the time it
takes for each to dissolve. d. Use four beakers
of water Add 1 teaspoon of sugar to Beaker 1.
Add 2 teaspoons of sugar to Beaker 2. Add 3
teaspoons to Beaker 3. Add 4 teaspoons of sugar
to Beaker 4. Measure the time it takes for each
to dissolve.
28
A radiometer looks like the diagram Inside a
sealed glass bulb, a pinwheel of four
metal squares rests loosely on a
central metal spike. Each square is black on
one side and white on the other.
When exposed to sunlight, the black surfaces
absorb more light than the white
surfaces. This heats the air molecules near the
black surfaces causing them to move more quickly.
The differences in motion in the air molecules
striking the pinwheel cause it to spin. The more
light hitting the radiometer, the faster it spins.
Which investigation would test the hypothesis
that black surfaces absorb more light than white
surfaces? a. Place the radiometer underwater. b.
Put a magnet next to the radiometer. c. Flip the
squares inside the radiometer. d. Place the
radiometer in complete darkness.
29
A radiometer looks like the diagram Inside a
sealed glass bulb, a pinwheel of four
metal squares rests loosely on a
central metal spike. Each square is black on
one side and white on the other.
When exposed to sunlight, the black surfaces
absorb more light than the white
surfaces. This heats the air molecules near the
black surfaces causing them to move more quickly.
The differences in motion in the air molecules
striking the pinwheel cause it to spin. The more
light hitting the radiometer, the faster it spins.
Which investigation would test the hypothesis
that black surfaces absorb more light than white
surfaces? a. Place the radiometer underwater. b.
Put a magnet next to the radiometer. c. Flip the
squares inside the radiometer. d. Place the
radiometer in complete darkness.
30
Which of the following laboratory containers
would BEST measure a quantity of liquid equal to
75.2 mL? a. a volumetric flask b. an Erlenmeyer
flask c. a test tube d. a graduated cylinder
31
Which of the following laboratory containers
would BEST measure a quantity of liquid equal to
75.2 mL? a. a volumetric flask b. an Erlenmeyer
flask c. a test tube d. a graduated cylinder
32
Which of the following would BEST measure the
weight of a lead weight? a. a triple-beam
balance b. a spring scale c. an analytical
balance d. a graduated cylinder
33
Which of the following would BEST measure the
weight of a lead weight? a. a triple-beam
balance b. a spring scale c. an analytical
balance d. a graduated cylinder
34
A student came to class one day and found some
yellow flakes in the sink at a lab station. What
should he do? a. Turn on the water and rinse the
yellow flakes down the sink. b. Use a paper towel
to pick up the flakes and discard in the trash
can. c. Pick up the flakes using gloves, and then
place the flakes in a beaker to give to his
teacher. d. Wipe the flakes up with a moist paper
towel, and then throw them in the trash can.
35
A student came to class one day and found some
yellow flakes in the sink at a lab station. What
should he do? a. Turn on the water and rinse the
yellow flakes down the sink. b. Use a paper towel
to pick up the flakes and discard in the trash
can. c. Pick up the flakes using gloves, and then
place the flakes in a beaker to give to his
teacher. d. Wipe the flakes up with a moist paper
towel, and then throw them in the trash can.
36
Gregory performed an experiment to determine the
density of five objects made of the same
material. He predicted that all of the objects
should have the same density. Gregory analyzed
his calculations and determined that two of the
five objects have vastly different density
values, while three of the densities were very
close. Which of the following best accounts for
possible errors which may have caused this? a.
The graduated cylinder used to determine the
volume by displacement was in error. b. The
balance was not set at zero or he used different
balances. c. The lead weights were
contaminated. d. The lead weights in fact had
different densities.
37
Gregory performed an experiment to determine the
density of five objects made of the same
material. He predicted that all of the objects
should have the same density. Gregory analyzed
his calculations and determined that two of the
five objects have vastly different density
values, while three of the densities were very
close. Which of the following best accounts for
possible errors which may have caused this? a.
The graduated cylinder used to determine the
volume by displacement was in error. b. The
balance was not set at zero or he used different
balances. c. The lead weights were
contaminated. d. The lead weights in fact had
different densities.
38
Water samples were prepared containing equal
quantities of water at the same temperature. Each
sample received a different amount of salt and
was placed into a freezer. The length of time it
took for each sample to freeze was
recorded. Which conclusion correctly interprets
the information from Jerrys table?
Amount of Salt Added in grams (g) Freezing Time in minutes (min)
0 48
1.25 68
2.50 75
3.70 88
5.00 (Didt freeze during the time of the experiment)
a. A conclusion cannot be made because the last
sample did not freeze. b. Doubling the salt
doubled the time needed for the samples to
freeze. c. An increase in the amount of salt
lowered the time needed for the samples to
freeze. d. An increase in the amount of salt
increased the time needed for the samples to
freeze.
Pressure on the Balloon (N/cm2) Pressure on the Balloon (N/cm2)
0.70 0.70
1.40 1.40
2.06 2.06
2.80 2.80
3.44 3.44
Pressure on the Balloon (N/cm2) Pressure on the Balloon (N/cm2)
0.70 0.70
1.40 1.40
2.06 2.06
2.80 2.80
3.44 3.44
Pressure on the Balloon (N/cm2) Pressure on the Balloon (N/cm2)
0.70 0.70
1.40 1.40
2.06 2.06
2.80 2.80
3.44 3.44
39
Water samples were prepared containing equal
quantities of water at the same temperature. Each
sample received a different amount of salt and
was placed into a freezer. The length of time it
took for each sample to freeze was
recorded. Which conclusion correctly interprets
the information from Jerrys table?
Amount of Salt Added in grams (g) Freezing Time in minutes (min)
0 48
1.25 68
2.50 75
3.70 88
5.00 (Didt freeze during the time of the experiment)
a. A conclusion cannot be made because the last
sample did not freeze. b. Doubling the salt
doubled the time needed for the samples to
freeze. c. An increase in the amount of salt
lowered the time needed for the samples to
freeze. d. An increase in the amount of salt
increased the time needed for the samples to
freeze.
Pressure on the Balloon (N/cm2) Pressure on the Balloon (N/cm2)
0.70 0.70
1.40 1.40
2.06 2.06
2.80 2.80
3.44 3.44
Pressure on the Balloon (N/cm2) Pressure on the Balloon (N/cm2)
0.70 0.70
1.40 1.40
2.06 2.06
2.80 2.80
3.44 3.44
Pressure on the Balloon (N/cm2) Pressure on the Balloon (N/cm2)
0.70 0.70
1.40 1.40
2.06 2.06
2.80 2.80
3.44 3.44
40
Electromagnets are created by coiling a wire that
conducts electricity around a piece of iron and
then passing a current through the wire. Below
are the results of an investigation to determine
the relationship between the number of coils and
the strength of an electromagnet.
Number of Coils Average Number of Straight Pins Picked Up Average Number of Metal Screws Picked Up
Five Coils 2.7 1.0
Ten Coils 7.3 3.0
Twenty Coils 11.0 5.7
What can be concluded from the information in the
table above? a. The strength of the
electromagnetic increases when the current
increases. b. Increasing the number of coils of
an electromagnet increases its current. c.
Increasing the number of coils of an
electromagnet increases its strength. d. The
strength of an electromagnet does not depend on
the number of its coils.
41
Electromagnets are created by coiling a wire that
conducts electricity around a piece of iron and
then passing a current through the wire. Below
are the results of an investigation to determine
the relationship between the number of coils and
the strength of an electromagnet.
Number of Coils Average Number of Straight Pins Picked Up Average Number of Metal Screws Picked Up
Five Coils 2.7 1.0
Ten Coils 7.3 3.0
Twenty Coils 11.0 5.7
What can be concluded from the information in the
table above? a. The strength of the
electromagnetic increases when the current
increases. b. Increasing the number of coils of
an electromagnet increases its current. c.
Increasing the number of coils of an
electromagnet increases its strength. d. The
strength of an electromagnet does not depend on
the number of its coils.
42
You are given a flask with a mixture of salt and
water and asked to separate the two. You could a.
use an electric current to separate the salt from
the water. b. evaporate the water and collect the
salt. c. put it under the microscope to separate
the salt and water. d. let the salt settle out
and pour off the pure water from the top.
43
You are given a flask with a mixture of salt and
water and asked to separate the two. You could a.
use an electric current to separate the salt from
the water. b. evaporate the water and collect the
salt. c. put it under the microscope to separate
the salt and water. d. let the salt settle out
and pour off the pure water from the top.
44
A solid metal object with a mass of 50.4 grams is
put into a red liquid with a total mass of 300.0
grams. The metal object sinks to the bottom of
the red liquid. The same metal object is
retrieved from the bottom of the red liquid and
put into mercury. The metal floats in the
mercury. Which statement would be most correct
based on the observations? a. The density of the
red liquid is less than the density of the
mercury. b. The mass of the mercury must be
greater than the mass of the red liquid. c. The
volume of the red liquid must be less than the
volume of the mercury. d. A larger metal object
made of the same metal would sink in the mercury.
45
A solid metal object with a mass of 50.4 grams is
put into a red liquid with a total mass of 300.0
grams. The metal object sinks to the bottom of
the red liquid. The same metal object is
retrieved from the bottom of the red liquid and
put into mercury. The metal floats in the
mercury. Which statement would be most correct
based on the observations? a. The density of the
red liquid is less than the density of the
mercury. b. The mass of the mercury must be
greater than the mass of the red liquid. c. The
volume of the red liquid must be less than the
volume of the mercury. d. A larger metal object
made of the same metal would sink in the mercury.
46
Henry was curious to see if temperature affected
the growth of bread mold. He grew 15 identical
containers containing the same amount and type of
nutrients. Five containers were maintained at
0oC, five were maintained at 90oC, and five were
maintained at 27oC (room temperature). At the end
of four days the containers were examined and the
growth of the mold was measured and
recorded. Which of the following is the LEAST
effective method to measure the growth of the
bread mold in this experiment? a. the number of
spots of bread mold b. the size of the spots of
bread mold c. measurements of the diameters of
the spots of the bread mold. d. the color of the
spots of bread mold.
47
Henry was curious to see if temperature affected
the growth of bread mold. He grew 15 identical
containers containing the same amount and type of
nutrients. Five containers were maintained at
0oC, five were maintained at 90oC, and five were
maintained at 27oC (room temperature). At the end
of four days the containers were examined and the
growth of the mold was measured and
recorded. Which of the following is the LEAST
effective method to measure the growth of the
bread mold in this experiment? a. the number of
spots of bread mold b. the size of the spots of
bread mold c. measurements of the diameters of
the spots of the bread mold. d. the color of the
spots of bread mold.
48
A stallion is able to run 100 meters in 5.0
seconds. What is the average speed of the
stallion in kilometers per second? a. 0.02
km/s b. 50 km/s c. 0.5 km/s d. 20 km/s
49
A stallion is able to run 100 meters in 5.0
seconds. What is the average speed of the
stallion in kilometers per second? a. 0.02
km/s b. 50 km/s c. 0.5 km/s d. 20 km/s
50

• At a weightlifting competition, two competitors
  lifted the same weight to the same height. The
  second competitor accomplished the lift 2 seconds
  faster than the first competitor. This
  demonstrated that the second competitor had more
• energy than the first
• inertia than the first
• power than the first
• work than the first

51

• At a weightlifting competition, two competitors
  lifted the same weight to the same height. The
  second competitor accomplished the lift 2 seconds
  faster than the first competitor. This
  demonstrated that the second competitor had more
• energy than the first
• inertia than the first
• power than the first
• work than the first

52

• A piece of metal has a mass of 33.2 grams and
  when immersed in water, it displaces 12.3 mL of
  water. What is the density of this metal?
• 408 g/mL
• 2.7 g/mL
• 0.37 g/mL
• 20.9 g/mL

53

• A piece of metal has a mass of 33.2 grams and
  when immersed in water, it displaces 12.3 mL of
  water. What is the density of this metal?
• 408 g/mL
• 2.7 g/mL
• 0.37 g/mL
• 20.9 g/mL

54

• A team of six scientists is conducting a study of
  the potential health hazards of a new chemical
  used in making house paints. One members results
  show the possibility of a slight hazard, although
  this does not show up in any of the studies
  performed by the other team members. The team
  decides to publish all the results and suggest
  the need for further investigation into the
  possibility of a health hazard. Why would they
  make this decision?
• The other studies are incorrect because they did
  not show evidence of a hazard.
• The team members all believe the results of the
  study showing a slight hazard.
• The group funding the research wanted to find
  evidence of a health hazard.
• Even if the studies did not all agree, it is
  important for the scientific community to have
  the complete results of the research.

55

• A team of six scientists is conducting a study of
  the potential health hazards of a new chemical
  used in making house paints. One members results
  show the possibility of a slight hazard, although
  this does not show up in any of the studies
  performed by the other team members. The team
  decides to publish all the results and suggest
  the need for further investigation into the
  possibility of a health hazard. Why would they
  make this decision?
• The other studies are incorrect because they did
  not show evidence of a hazard.
• The team members all believe the results of the
  study showing a slight hazard.
• The group funding the research wanted to find
  evidence of a health hazard.
• Even if the studies did not all agree, it is
  important for the scientific community to have
  the complete results of the research.