The word for distance above sea level, or elevation, is ________
Earth's atmosphere is important to living things because it _______
a provides all the gases that living things need to survive
b maintains a constant humidity
c contains dust and other particles
provides all the gases that living things need to survive
The layer of atmosphere where weather occurs is ____
What percent of the atmosphere is made up of oxygen?
Where is the ozone layer found?
Harmful substances in the air, water, or soil are called ____
a acid rain
Water vapor is water in the form of ______
What is ozone?
B form of oxygen with 3 oxygen atoms in each molecule
How does air pollution affect human health.
a causes lung problems
b causes breath problems
c both of the above
both of the above
What do we call the instruments used to measure air pressure?
Name the 4 main layers in our atmosphere starting from Earth to space.
troposphere, stratosphere, mesosphere, thermosphere
What layer of the atmosphere protects Eart from being hit by most meteroids?
Earth's atmosphere traps energy from the sun, which _____
a allows most of Earth's surface to be warm
b allows ozone to form easily
c causes meteors to burn up
allows most of Earth's surface to be warm
As you increase your altitude in a hot air balloon, or by climbing a mountain, the air pressure______
c doesn't change
The ozone layer protects living things on Earth from ___
a infrared rays
b carbon dioxide
c ultraviolet radiation
Most air pollution comes from ______
a forest fires
b human activities
c volcanic eruptions
The condition of Earth's atmosphere at a particular time and place is called _____
What are the 2 most abundant gases in the atmosphere?
nitrogen and oxygen
What is the atmosphere?
a the layer in which weather occurs
b the layer that contains the ozone layer
c the layer of gases that surrounds Earth
the layer of gases that surrounds Earth
When climbing a high mountain, you get out of breath easily because _______
a there is less oxygen in each cubic meter of air
b the percentage of oxygen in the air decreases
c air pressure is greater
there is less oxygen in each cubic meter of air
What does acid rain do to plants?
a makes them grow faster
c weakens the leaves
weakens the leaves
One source of carbon dioxide in the atmosphere is ____
b burning fuels
If there were no plants, then _______
a oxygen in the atmosphere would increase
b carbon dioxide in the atmosphere would increase
c carbon dioxide in the atmosphere would decrease
carbon dioxide in the atmosphere would increase
Two different units used to measure air pressure are _______
a inches & feet
b grams & liters
c inches & millibars
inches & millibars
What are the 3 properties of air?
mass, density, & pressure