G7 MX 9 Reviewer

The atmosphere is the invisible outermost layer surrounding the planet earth. Although invisible, it significantly affects our daily life. In which layer of the atmosphere can ozone layer found?

• troposphere

• mesosphere

• stratosphere

• thermosphere

The atmospheric layer which extends to a height of 16 kilometers over the equatorial region where weather occurs.

• mesosphere

• stratosphere

• troposphere

• exosphere

Identify if the activity help the ozone layer or not. Always turn on the aircon of your room due to the heat of the summer climate.

• True

• False

Burn the garbages especially plastic to lessen the amount thrown in dump sites.

• True

• False

Ride a bicycle going to to school for exercise and to lessen the number of vehicles using fossil fuels.

• True

• False

The earth acts as greenhouse that traps heat coming from the sun.

• True

• False

Which of the following activities contributes the MOST to carbon emissions globally?

• Deforestation

• Burning fossil fuels

• Agriculture

• Respiration

The heat that is radiated back is trapped by the greenhouse gases and warms the troposphere. This phenomenon is called greenhouse affect.

• True

• False

Which of the following is NOT a greenhouse gas?

• methane

• oxygen

• water vapor

• carbon dioxide

Gas in the atmosphere that protects the Earth from the Sun's rays

• atmosphere

• troposphere

• ozone

• nitrogen