Human Impact

Fill in the blank. Greenhouse gases create a thermal _______ around the Earth keeping it warm.

• source

• blanket

• sheet

• cover

Which word includes the nonrenewable resources oil, coal and natural gas?

• respiration

• deforestation

• renewable resources

• fossil fuels

What do we call the cutting down of trees which leads to less carbon dioxide being absorbed from the atmosphere?

• transportation

• deforestation

• agriculture

• decomposition

Which of the following fossil fuels are used to power trains, grills as wells as in fireplaces?

• air

• oil

• natural gas

• coal

How are greenhouse gases emitted from fossil fuels?

• they are emitted when we plant them in the ground

• they are emitted when we add water to them

• they are emitted when we burn them

• they are emitted when we eat them

What gas from the list below is a cause for global warming?

• Urethane
• Oxygen
• Carbon Dioxide

Humans have the ability to cause temperature change.

• True
• False

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

• Deforestation
• Agriculture
• Burning fossil fuels
• Respiration

Melting of glaciers and polar ice caps....

• will result in cooler temperatures in the Arctic
• will result in sea-levels rising
• Will have no effect on ecosystems
• None of the above

The Earth acts like a greenhouse that catches and traps heat from the sun.

• true
• false