BioH Unit 9

Which of the following have been changed or altered due to climate change ?

• droughts

• flooding

• melting of polar ice caps

• all of the above

The main human activity that releases greenhouse gases is

• using public transportation and there by reduce the affects of greenhouse gases.

• burning fossil fuels

• texting on cellphones

• eating meat

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

• deforestation

• photosynthesis

• oceans

• all of the above

• the loss of animal species

Which natural process removes carbon dioxide from the atmosphere?

• forest fires
• volcanic eruptions
• cellular respiration
• photosynthesis

Which is a green-house gas?

• Methane
• Oxygen
• Hydrogen
• Ammonium

How does the concentration of carbon dioxide in the atmosphere affect climate?

• As carbon dioxide concentrations increase, temperatures increase
• As carbon dioxide concentration increase, temperatures decrease.
• Carbon dioxide concentrations have no affect on climate
• As carbon dioxide concentrations increase, temperatures become more random.

Possible human solutions for limiting global warming and climate change are...

• being more energy-efficient

• using renewable sources of energy

• removing carbon from fossil fuel emissions

• all of the above

Carbon is stored in

• Trees and other living things
• Oceans
• underground in soil and fossil fuels
• All are correct

As polar ice caps melt, Earth lets less reflective. If less sun is reflected, the more light is absorbed which heats Earth up more which causes more ice to melt. This is an example of...

• Negative feedback loop

• Positive feedback loop

Higher temperatures cause more evaporation, which causes more water vapor to be in the air. Water vapor is a greenhouse gas, so more water vapor will lead to Earth warming even more. This is an example of...

• Negative Feedback Loop

• Positive Feedback Loop