The carbon cycle and the greenhouse effect

What is the worst greenhouse gas? (Based on temperature change per molecule)

• carbon dioxide

• methane

• sulfur hexafluoride

• nitrogen

What is the worst greenhouse gas? (based on the temperature change per molecule AND the amount of gas in the atmosphere)

• carbon dioxide

• methane

• sulfur hexafluoride

• nitrogen

What is the form of carbon when dissolved in our oceans?

• carbon dioxide

• shells

• carbonic acid

• fossil fuels

Which process takes carbon dioxide out of the atmosphere?

• photosynthesis

• respiration

• combustion

• decomposition

Most of the carbon on earth exists in

• the atmosphere (air)

• the hydrosphere (water)

• the biosphere (plants & animals)

• the lithosphere (rocks & sediments)

Which process tips the carbon cycle "out of balance"?

• photosynthesis

• respiration

• combustion

• decomposition

The greenhouse effect traps energy from the sun in the form of

• visible light

• ultraviolet light

• cosmic radiation

• infrared light (heat)

Which IS NOT an effect of climate change?

• warmer average temperatures on earth

• more acidic oceans

• sea level rise

• longer days

Which IS NOT a cause of sea level rise?

• Glaciers melting on land (like Greenland & Antarctica)

• Ice melting in the ocean (like the Arctic)

• Warm water expanding

• Glaciers melting on mountain tops (like in the Andes)

What is the main cause of climate change?

• volcanic eruptions

• more energy from the sun

• deforestation

• human use of fossil fuels