# Grade 6 Weather Final Review A: Question Preview (ID: 6673)

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The atmosphere is
a) the layer in which weather occurs.
b) the layer that contains the ozone layer.
c) the layer of water in the oceans.
d) the layer of gases that surrounds Earth.

The two most abundant gases in the atmosphere are
a) carbon dioxide and oxygen.
b) carbon dioxide and nitrogen.
c) nitrogen and oxygen.
d) nitrogen and hydrogen.

Ozone is
a) a form of oxygen with three oxygen atoms in each molecule.
b) a form of nitrogen with three nitrogen atoms in each molecule.
c) a form of oxygen with two oxygen atoms in each molecule.
d) a form of nitrogen with two nitrogen atoms in each molecule.

Water vapor is water in the form of
a) steam.
b) crystals.
c) a gas.
d) droplets.

Earthâ€™s atmosphere is important to living things because it
a) contains dust and other particles.
b) is very thin compared to the size of Earth.
c) provides all the gases that living things need to survive.
d) maintains a constant relative humidity.

Air has pressure because
a) the stratosphere is thick.
b) air has mass.
c) wind moves the air.
d) temperature warms the air.

Density can be determined using the formula
a) density = mass/volume.
b) density = mass+volume.
c) density = mass x volume
d) density = mass-volume.

Instruments used to measure air pressure are called
a) thermometers.
b) hygrometers.
c) hydrometers.
d) barometers.

As you rise upwards in the atmosphere, air pressure
a) increases.
b) decreases.
c) doesn't change.
d) first it increases and then decreases.

The layer of our atmosphere in which weather occurs is the
a) troposphere.
b) stratosphere.
c) mesosphere.
d) exosphere.

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