Ch 8, Lessons 1-3, 6th Grade Question Preview (ID: 61087)
Atmosphere.
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21% of the atmosphere is
a) oxygen
b) nitrogen
c) carbon dioxide
d) trace gases
___ form when water vapor condenses out of the air to form tiny droplets of water or crystals of ice.
a) clouds
b) raindrops
c) dew
d) smoke
The term used to describe the condition of Earth's atmosphere at a given place or time is
a) weather
b) climate
c) atmosphere
d) clouds
When air pressure increases, the walls of an aneroid barometer's chamber are
a) pushed in
b) bulging out
c) staying the same
d)
The amount of mass in a given volume of air is its
a) density
b) weight
c) height
d) volume
Aside from inches of mercury, the other unit of measurement for air pressure is
a) millibars
b) kilobars
c) millimercury
d) millipressure
The top of the stratosphere is ___ than the bottom.
a) warmer
b) cooler
c) more dense
d) bluer
The mesosphere protects Earth's surface by
a) burning up meteoroids
b) having the ozone layer
c) keeping Earth warm
d) producing oxygen
The highest layer of the atmosphere is the
a) thermosphere
b) troposphere
c) stratosphere
d) mesosphere
What are the two layers in the thermosphere?
a) exosphere and ionosphere
b) exosphere and ozone
c) ionosphere and ozone
d) ozone and mesosphere
This gas makes up less than 1% of the atmosphere but is essential to life
a) equator
b) Poles
c) tropic of cancer
d) tropic of capricorn
The troposphere is thickest over the
a) carbon dioxide
b) oxygen
c) nitrogen
d) water vapor
The amount of ___ varies greatly from place to place and from time to time.
a) water vapor
b) carbon dioxide
c) argon
d) oxygen
Pure air contains only gases and exists only in laboratories
a) false
b) true
c)
d)
The result of the weight of a column of air pushing on an area is
a) air pressure
b) density
c) humidity
d) evaporation
___ is the average level of the oceans
a) sea level
b) altitude
c) density
d) air pressure
When altitude increases, air pressure
a) decreases
b) increases
c) stays the same
d)
As you get to the top of the troposphere, temperature
a) decreases
b) increases
c) stays the same
d)
Water forms thin, feathery clouds of ice at the top of the
a) troposphere
b) stratosphere
c) exosphere
d) ionosphere
Which layer is just above the stratosphere?
a) mesosphere
b) troposphere
c) thermosphere
d) exosphere
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