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6th grade Science test The Atmosphere
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The percentage of oxygen in the atmosphere is approximately_______.
21%
A gas in the atmosphere that varies in different places and from time to time is____.
water vapor
Photochemical smog is caused by the action on chemicals of ______.
sunlight
Harmful substances in air, water, or soil are called _____.
pollutants
The amount of mass in a given volume of a substance is its _____.
density
As the density of air decreases, its pressure___.
decreases
Air pressure is often measured in ______.
millibars
The warmest layer of the atmosphere is the ______.
thermosphere
The layer of the atmosphere that reflects radio waves is the ______.
thermosphere
The stratosphere helps protect Earth from too much ultraviolet radiation because this layer of the atmosphere contains ______.
ozone
_______ is the most abundant gas in the atmosphere.
Nitrogen
Particles of carbon that enter the air when wood or coal are burned are called ______.
soot
One cause of acid rain is the burning of coal that contains a lot of ______.
sulfur
_______ is the force per unit area.
Pressure
The four main layers of the atmosphere are classified according ti changes in ______.
temperature
What is the condition of Earth's atmosphere at a particular time and place.
Altitude
What to fires need to burn?
oxygen
Has air quality improved over the past thirty years?
yes
Does air pressure decrease as altitude decreases?
NO it increases
Do auroras occur in the atmosphere?
yes
How is the density of air at the top of a mountain different that the density of air at sea level?
The air at the top is denser that the air at sea level.
Why would you have more trouble breathing at the top of a mountain than the density of air at sea level?
There are fewer molecules in a square meter of air at the top of the mountain.
Be able to describe how temperature in the atmosphere changes with altitude between the four main layers of the Earth's atmosphere.
Thermosphere:
Mesosphere:
Stratosphere:
Troposphere:
Author
CmuellerALC
ID
318971
Card Set
6th grade Science test The Atmosphere
Description
6th grade Science test The Atmosphere
Updated
2016-04-15T16:14:30Z
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