Chemistry Unit 2 TAKS Assessment Review Questions:

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Chemistry Unit 2 TAKS Assessment Review Questions
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• 1. Bio 4B When a sea urchin egg is removed from
  the ocean and placed in freshwater, the egg
  swells and bursts. Which of these causes water to
  enter the egg?
• A Coagulation
• B Sodium Pump
• C Active transport
• D Osmosis

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• 1. Bio 4B When a sea urchin egg is removed from
  the ocean and placed in freshwater, the egg
  swells and bursts. Which of these causes water to
  enter the egg?
• A Coagulation
• B Sodium Pump
• C Active transport
• D Osmosis

Osmosis is the diffusion of water across a
semi-permeable membrane from an area of high
concentration to an area of low concentration.
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• 2. Bio 4B Saltwater fish remove extra salt from
  their body by active transport through their
  gills. What is the result of this activity?
• A The salt becomes more chemically active.
• B Water balance is maintained in the blood.
• C The rate of energy production is decreased.
• D The cell membrane becomes less permeable to
  water

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• 2. Bio 4B Saltwater fish remove extra salt from
  their body by active transport through their
  gills. What is the result of this activity?
• A The salt becomes more chemically active.
• B Water balance is maintained in the blood.
• C The rate of energy production is decreased.
• D The cell membrane becomes less permeable to
  water

Removal of extra salt is necessary to prevent
excessive amounts of water from building up in
the fishs tissues. Remember that water can
travel across membranes passively (without using
energy) but salt cannot.
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• 3. Bio 4B Which molecule provides most of the
  energy used to drive chemical reactions in cells?
• A DNA B RNA C ATP D ADP

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• 3. Bio 4B Which molecule provides most of the
  energy used to drive chemical reactions in cells?
• A DNA B RNA C ATP D ADP

ATP, or Adenosine Triphosphate, is the energy
storing molecule in living cells.
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• 4. IPC 6A A skier glides from location A to
  location B across the friction free ice. What
• happened to the energy of the skier?
• A The potential energy decreases and the kinetic
  energy decreases
• B The potential energy increases and the kinetic
  energy increases
• C The potential energy decreases and the kinetic
  energy increases.
• D Both potential energy and kinetic energy remain
  the same.

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• 4. IPC 6A A skier glides from location A to
  location B across the friction free ice. What
• happened to the energy of the skier?
• A The potential energy decreases and the kinetic
  energy decreases
• B The potential energy increases and the kinetic
  energy increases
• C The potential energy decreases and the kinetic
  energy increases.
• D Both potential energy and kinetic energy remain
  the same.

PE energy of position KEenergy of motion
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• 5. IPC 6A The kinetic energy of a roller coaster
  car depends on which of the following?
• A Mass and height
• B Velocity and height
• C Mass and acceleration
• D Mass and velocity

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• 5. IPC 6A The kinetic energy of a roller coaster
  car depends on which of the following?
• A Mass and height
• B Velocity and height
• C Mass and acceleration
• D Mass and velocity

KE1/2 mv2
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• 6. IPC 6A A small amount of mass is transformed
  into energy when
• A Gasoline burns in a car engine
• B A nuclear power plan produces electricity
• C You body digests a candy bar
• D An electric heater warms a room

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• 6. IPC 6A A small amount of mass is transformed
  into energy when
• A Gasoline burns in a car engine
• B A nuclear power plant produces electricity
• C You body digests a candy bar
• D An electric heater warms a room

All of the answer choices describe energy
conversions from one type of stored energy to
another, except choice B. Nuclear energy is
produced by splitting atoms (a very small amount
of mass!) to release energy.
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• 7. IPC 6A What will happen when a 2.0 g piece of
  metal at 100oC is placed into a 100 g cup of
  water at 20oC?
• A The water will decrease in temperature and the
  metal will increase in temperature
• B The water will increase in temperature and the
  metal will decrease in temperature
• C The water will increase in temperature and the
  metal will increase in temperature
• D Temperature will remain constant in the water
  and the metal.

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• 7. IPC 6A What will happen when a 2.0 g piece of
  metal at 100oC is placed into a 100 g cup of
  water at 20oC?
• A The water will decrease in temperature and the
  metal will increase in temperature
• B The water will increase in temperature and the
  metal will decrease in temperature
• C The water will increase in temperature and the
  metal will increase in temperature
• D Temperature will remain constant in the water
  and the metal.

Heat from the metal will move by conduction
(direct contact) from the metal to the water.
This will cool the metal while simultaneously
heating the water.
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• 8. IPC 5A At 0C sound travels through air at a
  speed of 330 m/s. If a sound wave is produced
  with a wavelength of 0.10 m,
• what is the waves frequency?
• A 0.0033 Hz B 33 Hz C 330 Hz D 3300 Hz

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• 8. IPC 5A At 0C sound travels through air at a
  speed of 330 m/s. If a sound wave is produced
  with a wavelength of 0.10 m,
• what is the waves frequency?
• A 0.0033 Hz B 33 Hz C 330 Hz D 3300 Hz

Rearranging the equation velocitywavelength x
frequency to velocity/wavelengthfrequency,
where Velocity330 m/s 330 m/s 3300
Hz Wavelength0.10 m 0.10 m Frequency?
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• 9. IPC 5A The diagram to the right shows a
  transverse wave moving toward the left along a
  rope. At the instant shown, point P on the rope
  is moving toward the
• A bottom of the page
• B top of the page
• C left of the page
• D right of the page

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• 9. IPC 5A The diagram to the right shows a
  transverse wave moving toward the left along a
  rope. At the instant shown, point P on the rope
  is moving toward the
• A bottom of the page
• B top of the page
• C left of the page
• D right of the page

The movement of point P is perpendicular (up and
down) compared with the movement of the wave
(left to right). The point will travel along the
length of the rope as the wave passes by. After
reaching the trough of the wave, the point will
move back up towards the top of the page.
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• 10. IPC 6B The transfer of heat by the movement
  of air currents in Earths atmosphere is an
  example of
• A conduction
• B convection
• C radiation
• D fusion

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• 10. IPC 6B The transfer of heat by the movement
  of air currents in Earths atmosphere is an
  example of
• A conduction
• B convection
• C radiation
• D fusion

When heated, liquids and gases become less dense
and rise. As they rise, they lose energy to
their surroundings, becoming more dense again.
An increase in density causes fluids to sink
again. This is called a convection current. If
youve ever seen a lava lamp, youve witnessed
convection currents.
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• 11. IPC 6B Which of these best explains why skin
  is warmed by radiant energy?
• A Sunlight absorbed by the skin increases the
  skins thermal energy.
• B High-frequency radiant energy is composed of
  waves with short wavelengths.
• C Uneven heating produces convection currents
  within the skin.
• D Atoms with loosely held electrons transmit heat
  by conduction.

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• 11. IPC 6B Which of these best explains why skin
  is warmed by radiant energy?
• A Sunlight absorbed by the skin increases the
  skins thermal energy.
• B High-frequency radiant energy is composed of
  waves with short wavelengths.
• C Uneven heating produces convection currents
  within the skin.
• D Atoms with loosely held electrons transmit heat
  by conduction.