Climate change

The ____________________ is a natural process in which certain gases in the atmosphere trap heat near Earth and prevent it from radiating back into space.

• Greenhouse zone

• Greenhouse effect

• Topic Layer

• Heat Zone

Which human activity contributes the most carbon dioxide to the atmosphere?

• fishing

• farming

• breathing

• burning fossil fuels

What is a consequence that increasing human population could have on the Earth's climate?

• decreasing global temperatures due to decreased fossil fuel use

• increased global temperatures due to increased use of fossil fuels

• a decreased heat island effect, due to less people living and working in urban areas

• all of these

The greenhouse effect is beneficial as it helps to sustain life on earth by naturally trapping heat in the atmosphere.

• TRUE

• FALSE

The annual fluctuation in carbon dioxide concentration can best be explained by the

• use of fossil fuels

• volcanic activity

• deforestation

• seasonal photosynthesis

As greenhouse gases increase, oceans are becoming

• clearer

• saltier

• more acidic

• muddier

The main human activity that releases greenhouse gases is

• using bottled water

• burning fossil fuels

• texting on cellphones

• eating meat

Deforestation contributes to greenhouse gases by

• loss of trees that would otherwise remove carbon dioxide from the air

• burning wood releases carbon dioxide

• Both are correct

It was cold last week. Is this a sign of climate change?

• Yes

• No

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