Human Influence on Environment

Wastes produced by agriculture, households, industry, mining, and other human activities can end up in ______________.

• groundwater
• streams and rivers
• oceans
• All of these choices

About 97% of the water on Earth is ___________________.

• fresh water
• groundwater
• salt water
• ice

Increase in which gas is primarily responsible for increased global warming?

• Carbon dioxide
• Water vapor
• Methane
• Nitric oxides

When fertilizers run off farmland into streams and ponds, the nitrogen content of the water increases. This can lead to rapid growth of algae in a process called eutrophication. How can this process affect other organisms in the water?

• Oxygen is used up as algae is decomposed, reducing the amount available to other organisms.
• The water becomes better able to support aerobic organisms.
• The algae provide food for fishes and other organisms, leading to decreased algae populations.
• The extra nitrogen provides additional food for the other organisms, increasing their population.

Carbon is released into the atmosphere through all of the following ways except:

• respiration
• cow flatulence
• photosynthesis
• all of the above

Wind is a __________ energy resource.

• Renewable
• Nonrenewable

Which type of pollution is shown in the image below?

• Air pollution

• Water pollution

• Acid precipitation

• Global warming

Which type of human impact is shown in the picture below?

• Desertification

• Deforestation

• Urban sprawl

• Land pollution

Which of the following is an example of a non-renewable resource?

• Solar Energy

• Wind Energy

• Hydro Energy

• Fossil Fuel Energy

Which of the following is one way that we can preserve water resources?

• Leave the water running while you are washing dishes or brushing your teeth

• Only do laundry on certain days even if you don’t have full loads

• Take shorter showers

• Set your irrigation systems on timers so they only water at certain times, rain or shine