Topic 13

The ozone layer protects living organisms on Earth by

• enhancing solar energy.

• blocking solar ultraviolet (UV) radiation

• blocking solar infrared (IR) radiation

• preventing escape of water vapor

Seasonal changes in daylight hours and climatic conditions are caused by

• the annual change of distance from Sun to Earth.

• ocean currents

• lunar phases.

• the 23.5 degree tilt of Earth's axis.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-6

Ozone holes appear in polar regions during springtime when ozone-destroying

• chlorine atoms are released from polar stratospheric clouds

• chlorine atoms are captured by polar stratospheric clouds

• CFCs are synthesized in polar stratospheric clouds

• CFCs magnify ultraviolet light

Tags

NGSS.MS-PS1-3

a greenhouse gas added to the atmosphere when fossil fuels are burned

• O2

• N2

• H2

• CO2

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NGSS.MS-ESS3-5

international limits on CFC production to protect the ozone layer

• Clean Air Act

• Montreal Protocol

• Toronto Protocol

• Los Angeles Protocol

result of high UV radiation at Earth's surface

• DNA damage

• surface ocean currents

• El Nino

• La Nina

As cold air sinks,

• it expands and cools further

• it compresses and warms

• it remains the same pressure and temperature.

• it always releases water vapor.

Tags

NGSS.MS-ESS2-5

Elevation is a factor in climate because under most conditions,

• temperature falls as elevation increases.

• temperature rises as elevation increases.

• temeprature is not affected by elevation.

• snowfall is unlikely at high elevation.

Though CFC production has been curtailed, the threat to upper atmospheric ozone continues because CFCs

• become harmless quickly.

• destroy ozone for only ahort time.

• persist but stop destroying ozone.

• persist and continue to destroy ozone for decades.

What is the primary function of the ozone layer in Earth's atmosphere?

• Enhancing solar energy

• Blocking solar ultraviolet (UV) radiation

• Blocking solar infrared (IR) radiation

• Preventing escape of water vapor