Climate Change

Floating sea ice melts...

• and causes sea levels to rise because it adds water to the ocean.

• but does not cause sea levels to rise because the ice sheets are already on sea water and add same amount of water to it after melting.

Which of the following is contributing to an INCREASE in carbon dioxide in the atmosphere?

• deforestation

• photosynthesis

• oceans

• the loss of animal species

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

• Urethane
• Oxygen
• Carbon Dioxide

What do scientists think the effect will be of having more greenhouse gases in our atmosphere?

• More warming of the atmosphere
• More cooling of the atmosphere
• More air in the atmosphere
• Less air in the atmosphere

What do humans do that releases greenhouse gases into the atmosphere?

• Burn fossil fuels (like gas and coal)
• Build cement buildings
• Ride bikes and use solar energy
• Compete in the Olympics

Which natural process removes carbon dioxide from the atmosphere?

• forest fires
• volcanic eruptions
• cellular respiration
• photosynthesis

Climates change very slowly, over hundreds or thousands of years.

• True

• False

A volcanic eruption on Earth causes the temperature to

• rise

• stay the same

• drop

Which of these are fossil fuels? Select all fossil fuels listed(choose more than one).

• steam

• coal

• gas

• oil

Another greenhouse gas that is released by the decay of organisms found in glaciers is

• nitrogen

• methane

• hydrogen

• helium