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5th Grade-Chapter 7 Water on Earth

STUDY
PLAY
hydrosphere
all the waters of earth
3/4
The hydrosphere covers _________ of Earth's surface.
ocean
Almost all of the hydrosphere is __________ water.
Pacific Ocean
the largest and deepest ocean
salinity
measure of how salty the water is
lower
When rivers meet oceans, the salinity is ___________ than warmer ocean water.
table salt
Sodium chloride is known as ___________.
winds & cold, salty water sinking under warmer water
2 causes of ocean currents
rivers
Oceans get salt from ___________.
warmer
Ocean water near the equator is ____________ than water near the poles.
tuna, salt, magnesium, drinking water
4 examples of ocean resources
rain or snow
Almost all of Earth's fresh water starts as ___________.
groundwater
rain or melted snow that soaks into the ground
aquifer
layer of rock and soil that groundwater occupies
water table
top level of groundwater in an aquifer
watershed
area from which water drains into a river
reservoir
artifical lake that forms behind a dam
Antarctica & Greenland
2 locations of much of Earth's ice
glaciers & ice sheets
form when each year's snowfall is greater than the amount that melts
iceberg
large piece of floating ice broken off a glacier
chlorine & flouride
2 chemicals added to drinking water
water vapor
water as an invisible gas
decreases
Air pressure __________ as you move higher in the atmosphere.
water cycle
repeated movement of water through the enviroment in different forms
evaporation
liquid water changes to water vapor
condensation
water vapor changes to liquid water
precipitation
water falls from clouds as rain, snow, sleet or hail
dew
Condensation forms __________.
sublimation
ice changing into water vapor without first melting
frost
ice crystals formed by frozen water vapor
when plants make sugar during photosynthesis & during respiration
2 examples of water made by living things
clouds
form when water vapor changes into tiny water droplets or ice crystals
temperature & air pressure
factors that determine if a cloud is made of water droplets or ice crystals
cirrus cloud
thin, wispy, high altitude cloud
thunderhead
vertical cloud that causes thunderstorms
altocumulus cloud
mid-altitude cloud that look like small, puffy balls
stratus cloud
low-altitude cloud that covers the whole sky
fog
cloud at ground level
sleet
frozen raindrops
hail
form when strong winds blow raindrops back into the freezing air of a cloud
snow
precipitation when ice crystals fall
freezing rain
when rainwater freezes as it lands