Science District Assessment Review

The atmosphere is

• the layer on which weather occurs

• the layer that contains the ozone layer

• they layer of water in the oceans

• the layer of gases that surrounds Earth

The ozone layer is found in which layer of the atmosphere?

• troposphere

• stratosphere

• mesosphere

• thermosphere

Water vapor is water in the form of

• steam

• crystals

• a gas

• droplets

The percentage of oxygen in the atmosphere is

• less than 1%

• 78%

• 21%

• 99%

Photochemical smog results from the interaction of pollutants in the presence of

• water vapor

• oxygen

• sunlight

• rainfall

Instruments used to measure air pressure are called

• thermometers

• hygrometers

• hydrometers

• barometers

Air pressure is greatest where? (Remember - air pressure decreases as altitude increases)

• at a mountain top

• at sea level

• in the stratosphere

• in the ionosphere

Wind speed is measured with a(n)

• wind vane

• anemometer

• psychrometer

• thermometer

Which is a narrow band of high speed winds located at the top of the troposphere

• polar easterly

• sea breeze

• trade wind

• jet stream

The main layers of the atmosphere are classified according to changes in

• altitude

• density

• pressure

• temperature