human

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

• Solar Energy

• Wind Energy

• Hydro Energy

• Fossil Fuel Energy

Is the following an example of a positive or negative impact on the earth's ocean systems?

Artificial reefs placed on the seafloor enhance marine life by creating new reef habitats.

• Positive Human Impact on Ocean Systems

• Negative Human Impacts on Ocean Systems

Is the following an example of a positive or negative impact on the earth's ocean systems?

Fertilizers from farms runoff into rivers and create dead zones at the mouth of rivers in our world's oceans.

• Positive Human Impact on Ocean Systems

• Negative Human Impacts on Ocean Systems

Most water pollution is the result of

• human activities.
• drought.
• volcanic eruptions.
• storms.

What is the major cause for air pollution? 

• factories and cars
• cigarretes 
• deforestation
• oil spills

Carlos has made a list of nonrenewable natural resources. Which two resources do not belong on his list?

• A.

  oil

• B.

  sunlight

• C.

  coal

• D.

  wind

The graph shows the change in the percentage of forest area on Earth’s surface from 1990 to 2014. Which are the two most likely reasons for this change?

• A.

  The world population has increased.

• B.

  The world population has decreased.

• C.

  Growing crops has become more efficient.

• D.

  More land is needed to grow crops.

Select the correct category for the following conservation effort:

Using ceramic plates instead of paper plates

• Recycle

• Reuse

• Reduce

The bar graph shows the recycling rate of five items in 1990, 1995, and 2000.

In what year was the recycling rate for aluminum cans the greatest?

• 1990

• 1995

• 2000

Where is pollution found on the earth?  

• only on the land

• only in the air

• only in the water

• on land, in the air, and in the water