u4l1 - the water cycle
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Science Fusion PowerNotes - Grade 8 Unit 4 Lesson 1 - The Water CycleTRANSCRIPT
Unit 4 Lesson 1 The Water Cycle
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Unit 4 Lesson 1 The Water Cycle
Indiana Standards
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• 8.2.1 Recognize and demonstrate how the sun’s energy drives convection in the atmosphere and in bodies of water, which results in ocean currents and weather patterns.
• 8.2.2 Describe and model how water moves through the earth’s crust, atmosphere, and oceans in a cyclic way, as liquid, vapor, and solid.
What Goes Up …
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What is the water cycle?
• Movement of water between the atmosphere, land, ocean, and living things make up the water cycle.
• Water and snow moves downward due to gravity. Water vapor moves upward.
Unit 4 Lesson 1 The Water Cycle
How does water change state?
• Water on Earth is found as a liquid, solid, or gas.
• Water absorbs energy as it melts from solid to liquid.
• Water absorbs energy as it evaporates from liquid to gas.
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Unit 4 Lesson 1 The Water Cycle
How does water change state?
• Water releases energy when it condenses from gas to liquid or when it sublimates from solid to gas.
• Water releases energy as it freezes from liquid to solid or deposits from gas to solid.
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Unit 4 Lesson 1 The Water Cycle
How does water reach the atmosphere?• Water reaches the atmosphere through
evaporation, transpiration, and sublimation.
• Evaporation occurs when liquid water changes to water vapor.
• Most evaporation comes from Earth’s oceans.
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Unit 4 Lesson 1 The Water Cycle
How does water reach the atmosphere?• Transpiration is the release of water vapor into
the atmosphere by plants.
• Sublimation is when solid water changes directly to water vapor without first becoming a liquid.
• Sublimation can occur when dry air blows over ice or snow.
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Unit 4 Lesson 1 The Water Cycle
How does water reach the atmosphere?• Rank the letters A, B, and C according to the
amount of water each releases into the atmosphere.
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Unit 4 Lesson 1 The Water Cycle
What happens to water in the atmosphere?• Condensation is the change of state from gas to
liquid.
• Condensation can occur as clouds, fog, or mist, or on the ground as dew.
• Precipitation is any form of water that falls to Earth from clouds.
• Rain, snow, and hail are forms of precipitation.
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Unit 4 Lesson 1 The Water Cycle
How does water move on land and in the oceans?• Water that flows over land and into streams and
rivers is called runoff.
• Water seeps into the ground through infiltration.
• Water underground is called groundwater.
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Unit 4 Lesson 1 The Water Cycle
How does water move on land and in the oceans?• Glaciers flow downhill and sometimes flow into the
ocean.
• Winds move ocean water on the surface long distances.
• Cold or salty water will sink in the ocean, forming deep ocean currents that move large amounts of water.
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Unit 4 Lesson 1 The Water Cycle
Water Works
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What does the water cycle transport?
• The water cycle moves energy and matter.
• Energy is transported by changes in state and by the movement of water from place to place.
• Matter is transported by the vast amounts of water that move all around the world.
Unit 4 Lesson 1 The Water Cycle
What does the water cycle transport?
• Identify the steps in the water cycle.
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Unit 4 Lesson 1 The Water Cycle