Energy Transfer

Why do animals need energy from food?

• Animals need energy from the Sun in order to grow, move, and do other life functions.

• Plants need energy from the Sun in order to grow and create their own food.

• Animals need energy to make their own food.

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Which part of the plant is primarily involved in photosynthesis?

• The root system

• The stem

• The leaf

• The flower

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Where do many animals get their energy?

• From carbon dioxide

• From the Sun

• From plants

• From water

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This energy is used for growth, motion and to ____________, or make the body well again.

• repair

• transferred

• energy

• grow

• move

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Which best explains how a fluid is heated?

• conduction

• convection

• radiation

• evaporation

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When a warm plate is placed onto a cool counter, which most likely occurs?

• The plate gains heat and the countertop gains heat.

• The plate loses heat and the countertop gains heat.

• The plate gains heat and the countertop loses heat.

• The plate loses heat and the countertop loses heat.

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Kayla has a wooden rod, a steel rod, and a glass rod. How could she compare the materials to find out which transfers thermal energy BEST?

• Submerge each rod in ice water to find out which loses the most heat.

• Place the three rods in a freezer to find out which becomes the coldest.

• Place one end of each rod in very hot water to find out which becomes hot the fastest.

• Place the rods on a table in a warm room and find out which feels warmest after a period of time.

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How does the sun warm a person’s face?

• through evaporation

• through radiation

• through conduction

• through convection

Which best describes heat transfer due to convection??

• It occurs with direct contact.

• It occurs only during the day.

• It occurs with movement of a fluid.

• It occurs only when something is burning.

Which causes surface water in a lake to heat up during the hot summer?

• conduction

• convection

• evaporation

• radiation

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