Download Ch 6 Water Cycle and Weather

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