Powers Unit 8 Human Impact Test

Which greenhouse gas is the biggest contributor to the greenhouse effect?

• Methane (CH4)
• Nitrous Oxide (NO)
• Carbon Dioxide (CO2)
• CFCs

___________ is defined as any change in climate over time due to natural variability or as a result of human activity

• Greenhouse Effect
• Climate Change
• Weather
• Upwelling

Which of the following is a consequence of climate change?

• Rising temperatures
• Rising sea levels
• Increased drought and desertification
• Loss of biodiversity and species extinction
• All of the above

How does sunscreen impact coral reefs?

• Poisons corals, making them more susceptible to bleaching
• Coats corals preventing them from getting bleached by the sun
• Clouds the water
• Has no impact on coral reefs

Describes an event in which increased water temperature drive algae out of coral causing the corals to lose their source of food and color

• Ocean acidification
• Coral bleaching
• Red tides
• Dead zones

Area of the ocean with extremely low oxygen levels that cannot support marine life

• Ocean acidification
• Coral bleaching
• Red tides
• Dead zones

Occurs when carbon dioxide is absorbed into the ocean lowering its pH, dissolving calcium carbonate shells

• Ocean acidification
• Coral bleaching
• Red tides
• Dead zones

Occurs with an overgrowth of dinoflagellates causing a toxic algal bloom at the ocean's surface

• Ocean acidification
• Coral bleaching
• Red tides
• Dead zones

A(n) _________________ species involves an introduced organism that overpopulates and causes harm in its new environment

• Keystone
• Endangered
• Invasive
• Dominant

A(n) _________________ species is an organism at risk of extinction due to a sudden decrease in its population or loss of habitat

• Keystone
• Endangered
• Invasive
• Dominant