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Unit 8 -- Atmosphere
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Fill in the missing word
Exosphere
Fill in the missing word
Oceans and Seas
Name and explain step 4 in the urban water cycle.
Sewerage. used water is collected, usually in pipes underground and transported to wastewater treatment plant
Name two things that can pollute the water.
waste from industry and towns, fuel spilled, warm water from nuclear power plants, pesticides, fertilizers, human or farm waste
Name and explain step 5 in the water cycle.
Filtration. The rain or snow sinks into the earth and becomes groundwater.
What step in the water cycle involves rain and snow?
Precipitation
What two forces/energy drive the water cycle?
energy of the sun and force of gravity
Name and explain step 3 in the water cycle.
Condensation. Water vapor cools and forms water droplets and clouds
What does this picture show?
Surface Tension
What do we call water without salt in it?
Fresh Water
Give two examples of surface water.
lakes, rivers, moisture in the ground, water vapor, parts of living beings
Where do we find 79% and 20%of the earth's freshwater?
Ice caps and glaciers and groundwater
What percentage of the Earth is covered in water? `
70%
What is the chemical name for water?
H2O
Name 2 consequences of climate change.
increase of average global temperatures, shrinking icebergs, rising sea levels, drier soil, more extreme weather phenomena, more heatwaves
Name 2 effects of air pollution.
1. acid rain 2. destruction of the ozone layer 3. increased greenhouse effect
What air pollutant is this an example of?
chlorofluorocarbon compounds- CFCs
Explain step 1 in this diagram.
The radiation reaches the Earth's surface.
Name two ways the atmosphere provides protection for the Earth.
1. acts as a filter by absorbing radiation and 2. protects us from meteorites
What two gases does the atmosphere contain that essential for life?
oxygen and carbon dioxide
Explain step 3 in this picture.
The radiation returns to the surface of the earth
What layer of the atmosphere is between 80- 500 km altitude?
Thermosphere
What gas makes up 21% of the air we breathe?
Oxygen
What layer of the atmosphere is where weather takes place?
Troposhere
What layer of the atmosphere contains the ozone layer?
Stratosphere
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