10.3 Energy Transfer
As water is heated by the sun, it becomes
less dense and rises. What causes the
decrease in the density of warming water?
 A. The water particles move faster,
causing the water to expand.
 B. The water particles move slower,
causing the water to expand.
 C. The water particles move faster,
causing the water to contract.
 D. The water particles move slower,
causing the water to contract.
Answer…
A
At night, the air is usually cooler than it is
during the day. Which term is best defined
as a measure of how hot or cold
something is?
 A. heat
 B. temperature
 C. kinetic energy
 D. thermal energy
Answer…
B
During the day, the portions of Earth’s
surface that receive sunlight absorb
energy in the form of heat. During the
night, Earth’s surface radiates this energy
back into space. What is the main form of
radiation released by Earth at night?
 A. visible light
 B. gamma rays
 C. infrared radiation
 D. ultraviolet radiation
Answer…
C
Different areas of Earth’s oceans receive
different amounts of energy in the form
of heat, resulting in ocean currents and
weather patterns. What is the main
source of this energy?
 A. kinetic energy from tides
 B. kinetic energy from ocean currents
 C. energy transfer within Earth’s crust
 D. electromagnetic radiation from the
sun
Answer…
D
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Conduction happens as energy flows from a
warmer object to a cooler object. Which of the
following is an example of conduction?
A. electromagnetic radiation transfers energy
from the sun to Earth
B. warmer air is pushed upward and out of the
way by cooler air
C. cooler air molecules come in contact with
warm ground, causing energy to be passed
to the air
D. dense water sinks to the ocean floor and less
dense water moves to the ocean surface
Answer…
C
What are the three mechanism
in which energy is transferred
through Earths system?
Answer…
Radiation
 Convection
 Conduction
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