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Chapter 6 – Water Cycle and Weather
4th Grade – Kristi GoggansEarth Science – Unit B
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Chapter 6 – Water Cycle and Weather
Think About It Question:
How does Earth’s WATER AFFECT WEATHER?
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Evaporation
• The change from liquid water to water vapor
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Condensation• The process of water vapor, a gas, changing
to a liquid
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Precipitation• Any form of water falling from the air to
Earth’s surface
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Humidity• The amount of water vapor in the air
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Front• The boundary across which two different air
masses touch another
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Meteorologist• A scientist who studies and measures weather
conditions
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Barometer• A tool that measures air pressure
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Anemometer• A tool that measures wind speed
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Wind Vane• A tool that shows the direction from which
the wind is blowing
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How much of Earth’s surface is water?
• 3/4• 1/2• 1/3
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Contrast the water in oceans with fresh water.
• Ocean water is warmer than fresh water• Fresh water has dissolved minerals and
oceans do not• Oceans are salty and fresh water is not
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Why is the Baltic Sea less salty than other seas?
• Deserts surround the Baltic Sea• Many rivers flow into the Baltic Sea• The Baltic Sea is in a warm place
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What is the Sun’s role in the water cycle?
• Water condenses when it is warmed by the Sun
• The Sun makes water particles slow down• Water evaporates in the Sun’s warmth
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What happens when moist air rises?
• The moist air is able to store even more water as it rises
• The moist air cools, and the water vapor condenses into clouds
• The moist air cools and is able to store more precipitation
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What is condensation?
• Water Vapor becoming liquid water as it cools
• Rain becoming ice when it cools• Ice becoming liquid water as it warms
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What do the curving lines on a weather map show?
• Areas where high and low temperatures are• Areas where low pressure systems are• Fronts and how they are moving
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What best describes air?
• A substance with no mass that contains water vapor
• A force that surrounds Earth• The gases that surround Earth’s surface
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What happens to air when there is an area of lower pressure nearby?• Air that was moving comes to a standstill• The water vapor in the air becomes less dense• The air moves toward the area of low
pressure
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Which of these will measure air pressure?
• Barometer• Anemometer• Condensation
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What is humidity?
• Air Pressure• How strong the wind is• The amount of water in the air
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Why do you often see clouds along a cold front?
• The water vapor in the warm air mass cools and condenses into clouds
• Clouds are left in the warm front• Cold air moves above the warm air to form
clouds
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Which best describes stratus clouds?
• Low-lying white clouds made of ice crystals• Clouds close to the ground that often bring
rain or snow• High, white and puffy clouds that may appear
in good weather