atmosphere
how far away from the earth is troposphere
4 to 12 miles (6 to 20 km) high
how many steps are in the water Cycle
7
How does air pressure affect fronts?
Warm fronts
what type of weather tool is an anemometer
to measure wind speed
What adds oxygen to the atmosphere?
photosynthesis of land plants
What are the 4 water cycle stages in order?
evaporation, condensation, precipitation and collection
How do air masses interact to form fronts?
When two different air masses come into contact, they don't mix. They push against each other along a line called a front.
What is the lowest layer of the atmosphere?
Troposphere
What is transpiration?
evaporation of water from plant leaves
What causes high pressure fronts?
ascending and descending air
thermosphere
What process occurs when water changes from a gas to a liquid?
Condensation
What happens when two air masses meet at a front?
One air mass is lifted above the other, creating a low pressure zone.
Which layer of the atmosphere has the most water vapor?
the troposphere
true or false
Water cycle helps to provide a constant supply of fresh water on earth
ture
What air fronts don t move?
stationary front