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Developer:
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Grade Levels:
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Discipline:
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Physical Science
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Objectives:
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- Students will determine whether or not water temperature has an effect on water currents.
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Vocabulary:
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Background:
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Question:
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How many drops of water will a penny hold?
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Hypotheis:
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It will be found that a penny will hold ______ drops of water.
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Materials:
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red food coloring
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blue food coloring
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ice | |
source of heat
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clear container
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water
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pan
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Procedure:
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- Place ice cubes at one end of the demonstration container.
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Fill the container with clear water.
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Put heated colored water into the container at the opposite end from the ice cubes.
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Put chilled colored water into the container on top of the ice cubes.
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Watch and record observations.
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Explanation:
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Observations:
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- In what direction did the red (heated) water move?
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Did the red (heated) water stay at the surface? Why?
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In what direction did the blue (cold) water move?
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Did the blue (cold) water stay at the bottom? Why?
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What kind of current does this illustrate?
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What is the purpose of the food coloring?
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What climate zone does the ice represent?
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What climate zone does the heated water represent?
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Draw the pattern that the water made and label the water and show the direction that the water was moving with arrows.
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Inference:
| It was shown that water temperature DOES / DOES NOT have an effect on water currents.
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