Structure and Composition of the Atmosphere
The image shows a representation of mountains of various heights, numbered 1, 2, and 3. The plain is labeled number 4. At which point is air pressure lowest? -1 -2 -3 -4
-1
As altitude increases, what happens to air pressure? -It fluctuates. -It increases. -It decreases. -It stays the same.
-It decreases.
Which is one way that Earth's atmosphere supports life? -It filters out oxygen. -It keeps Earth warm. -It increases UV radiation. -It provides a solid shield.
-It keeps Earth warm.
Which describes one of oxygen's roles in Earth's atmosphere? -allows fuels to burn -forms clouds that produce rain -is the gas that animals exhale -is used by plants to produce food
-allows fuels to burn
Which phrase describes density? -height of a point above sea level -force pushing on an area or a surface -amount of mass in a certain volume -amount of matter an object contains
-amount of mass in a certain volume
Which gas in Earth's atmosphere has increased over time due to burning fossil fuels? -oxygen -nitrogen -water vapor -carbon dioxide
-carbon dioxide
Which phrase describes air density? -increases as altitude increases -equals mass divided by volume -pushes molecules in one direction -exerts less pressure as it increases
-equals mass divided by volume
Which characteristic describes the troposphere? -contains the ozone layer -has the highest air pressure -spans 12-50 km above Earth -is a good place for planes to fly
-has the highest air pressure
Which word describes the amount of matter an object contains? -altitude -density -mass -pressure
-mass
Which correctly lists three characteristics that are used to describe air? -altitude, density, radiation -density, radiation, mass -mass, pressure, density -pressure, altitude, radiation
-mass, pressure, density
Which atmospheric layer prevents meteoroids from reaching Earth's surface? -mesosphere -stratosphere -thermosphere -troposphere
-mesosphere
Which gas in Earth's atmosphere helps living things make proteins? -oxygen -nitrogen -water vapor -carbon dioxide
-nitrogen
Which gas is most abundant in Earth's atmosphere? -oxygen -nitrogen -water vapor -carbon dioxide
-nitrogen
Which gas in Earth's atmosphere forms ozone? -oxygen -nitrogen -water vapor -carbon dioxide
-oxygen
Which atmospheric layer gets warmer as altitude increases and contains the ozone layer? -mesosphere -stratosphere -thermosphere -troposphere
-stratosphere
Joe, a hiker, stands at the top of a hill on a trail above the ocean. Joe's friend Dave is just starting out at the trailhead, which is at the beach. Which statement about this scenario is accurate? -The air Joe is breathing is denser than the air at sea level. -The air pressure is higher where Joe is than where Dave is. -If Joe keeps going up, air pressure will continue to decrease. -The air Joe is breathing is denser than the air Dave is breathing.
NOT -The air pressure is higher where Joe is than where Dave is.
