3. The Sun can best be described as —
A.) an icy planet
B.) a ball of superheated gas
B.) a ball of superheated gases
C.) a cloud of dust
D.) a burned-out star L F

5. Which two planets are closest to Saturn?
A.) Jupiter & Uranus
A.) Jupiter & Uranus
B.) Venus & Earth
C.) Mars & Mercury
D.) Mercury & Neptune L F

7. A.) boiling The diagram below shows water being heated in a container.
What process is taking place?
A.) boiling
A.) boiling
B.) melting
C.) freezing
D.) condensation L F

9. C,) It will melt A.) It will freeze B.) It will dissolve in water
A piece of solid matter is heated. It is something
that cannot burn. What will eventually happen
to this matter if its temperature continues to increase?
A.) It will freeze
B.) It will dissolve in water
C,) It will melt
C.) It will melt
D.) It will explode L F

11. Which of the following characteristics of
Earth is also found on the Moon?
A.) Life-supporting soil
B.) Atomosphere
C.) Water
D.) Gravity
D.) Gravity L F

13. Which provides an example
of thermal energy?
A.) a turkey being roasted
in the oven on Thanksgiving
A.) a turkey being roasted
in the oven on Thanksgiving
B.) a ball falling to the ground
C.) Light from the Sun being
reflected by the Moon
D.) wind blowing a sailboat
across a mountain lake L F

15. Which demonstrates the use of
mechanical energy?
A.) An air conditioner cools
a hot apartment in July
B.) A new light bulb makes it
easier to read a night
C.) New speakers make
computer games more exciting
D.) Furniture is carried by
movers into a new house
D.) Furniture is carried by
movers into a new house L F

17. Which is the correct order of development for this frog?
A.) 4, 2, 3, 1
B.) 2, 1, 4, 3
C.) 3, 1, 4, 2
D.) 2, 4, 1, 3
D.) 2, 4, 1, 3 L F

19. What is the melting point of ice
on the Celsius scale?
A.) -32º C
B.) 0º C
B.) 0º C
C.) 32º C
D.) 212º C L F

21. How do the trees in the rainforest
obtain their energy?
A.) By eating other plant life
B.) By using energy from the Sun
B.) By using energy from the Sun
C.) By drinking water through
their roots
D.) By absorbing heat from the
forest floor L F

23. How is coal formed? A.) People burn wood to make coal
B.) Farmers use biofuels to
produce coal
C.) The soft bodies of ancient sea
animals & plants turn to liquid
D.) The remains of plants in ancient
swamps were buried and turned to coal
D.) The remains of plants in ancient
swamps were buried and turned to coal L F

25. What causes day and night to
occur on Earth?
A.) The Sun revolves
around Earth
B.) The Moon’s shadow causes
night on Earth
C.) Earth rotates on its axis
C.) Earth rotates on its axis
D.) Earth revolves around the
Sun L F

27. Which practice uses a nonrenewable
source of energy?
A.) harvesting trees in a
rainforest
B.) burning coal to generate
electricity in a power plant
B.) burning coal to generate
electricity in a power plant
C.) using steam from below Earth’s
surface to turn a turbine
D.) building a dam to use falling
water to generate electricity L F

29. What is the original source of energy
in this ecosystem?
A.) grass & twigs
B.) the Sun
B.) the Sun
C.) the burning of fossil fuels
by humans
D.) nutrients in the soil left
by decomposers L F

31. C.) Avoiding humans Field mice learn some behaviors while
interacting with the environment.
Which behavior is most likely learned?
A.) Drinking water
B.) Running fast
C.) Avoiding humans
C.) Avoiding humans
D.) Sleeping during the day L F

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