9.b. Eutrophication & Climate Change

Eutrophication is defined as a change that occurs to an aquatic ecosystem. This change is mainly due to what?

• Newly introduced fish

• Depletion of the ozone layer

• Increased nutrient concentration

• Increase in atmospheric carbon dioxide.

How fast has the Earth’s temperature risen in the last century?

• 1.2 to 1.4 degrees Fahrenheit

• 2.4 to 2.8 degrees Fahrenheit

• .2 to .4 degrees Fahrenheit

• 12 to 14 degrees Fahrenheit

Which two are greenhouse gases.

• Carbon and ethanol gas

• Carbon monoxide and ethane gas

• Carbon dioxide and methane gas

• Nitrogen and hydrogen

What do climate models predict for our future?

• Rising sea levels that will lead to coastal flooding

• Less frequent hurricanes

• Less extreme droughts

• An increase in biodiversity

Which is the correct order of changes that occur during eutrophication?

• Aquatic plants cannot photosynthesize and die. Algal blooms blocks light from entering lower levels of a pond or lake. The fish and other aquatic organisms die. The bacteria decompose the algae, and they use up a lot of oxygen during this process. The algae die.

• Algal blooms blocks light from entering lower levels of a pond or lake. Aquatic plants cannot photosynthesize and die. The algae die. The fish and other aquatic organisms die. The bacteria decompose the algae, and they use up a lot of oxygen during this process.

• Algal blooms blocks light from entering lower levels of a pond or lake. Aquatic plants cannot photosynthesize and die. The algae die. The bacteria decompose the algae, and they use up a lot of oxygen during this process. The fish and other aquatic organisms die.

• Aquatic plants cannot photosynthesize and die. Algal blooms blocks light from entering lower levels of a pond or lake. The bacteria decompose the algae, and they use up a lot of oxygen during this process. The algae die. The fish and other aquatic organisms die.

What is the function of the ozone layer?

• The Earth’s solar blanket, it traps 98% of the sun’s heat

• The Earth’s air conditioner, it filters 98% of the sun’s heat

• The Earth’s sunscreen, it filters 98% of the sun’s UV rays

• The Earth’s air filter, it destroys 98% of the Earth’s bacteria and viruses

Where in the atmosphere is the ozone layer located?

• 3-5 km above the Earth’s surface

• 15-30 km below the Earth’s surface

• 150-300 km above the Earth’s surface

• 15-30 km above the Earth’s surface

O₃ is the molecular formula of ozone?

• True

• False

Ozone layer depletion has led to an increase in phytoplankton reproduction.

• True

• False

PCBs are the main reason for the breakdown of the ozone layer?

• True

• False