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Chapter 6 – Water Cycle and Weather. 4 th Grade – Kristi Goggans Earth Science – Unit B. Chapter 6 – Water Cycle and Weather. Think About It Question: How does Earth’s WATER AFFECT WEATHER?. Evaporation. The change from liquid water to water vapor. Condensation.
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Chapter 6 – Water Cycle and Weather 4th Grade – Kristi Goggans Earth Science – Unit B
Chapter 6 – Water Cycle and Weather Think About It Question: How does Earth’s WATER AFFECT WEATHER?
Evaporation • The change from liquid water to water vapor
Condensation • The process of water vapor, a gas, changing to a liquid
Precipitation • Any form of water falling from the air to Earth’s surface
Humidity • The amount of water vapor in the air
Front • The boundary across which two different air masses touch another
Meteorologist • A scientist who studies and measures weather conditions
Barometer • A tool that measures air pressure
Anemometer • A tool that measures wind speed
Wind Vane • A tool that shows the direction from which the wind is blowing
How much of Earth’s surface is water? • 3/4 • 1/2 • 1/3
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
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
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
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
What is condensation? • Water Vapor becoming liquid water as it cools • Rain becoming ice when it cools • Ice becoming liquid water as it warms
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
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
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
Which of these will measure air pressure? • Barometer • Anemometer • Condensation
What is humidity? • Air Pressure • How strong the wind is • The amount of water in the air
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
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