Global Warming

The greenhouse gas having the greatest role in human-caused global warming is

• methane
• carbon dioxide
• CFCs (chlorofluorocarbons)
• ozone

Changes in temperature are expected to be greatest

• near the equator
• near the poles

As greenhouse gases increase, oceans are becoming

• clearer
• saltier
• more acidic
• muddier

How do changes in the ocean affect coral reefs?

• Warm, acidic water causes coral to bleach and then die
• Coral reefs grow faster in warmer water
• Warmer water supports fish that like to eat coral, destroying the reefs
• Coral reefs aren't affected by changes in temperature and acidity

The main human activity that releases greenhouse gases is

• using bottled water
• burning fossil fuels
• texting on cellphones
• eating meat

Which kind of land can store 20 to 100 times as much carbon as the other?

• natural ecosystems
• agricultural land

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

Water vapor is a greenhouse gas

• True
• False

Some greenhouse gases are naturally present in the Earth's atmosphere

• True
• False

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

• Yes
• No