Quiz 2

Deforestation is....

• helpful to the land

• removing the top layer of dirt

• the removal of forests to use the land for other reasons

Which human action can cause pollution?

• Walking

• Biking

• Mining

Pollution causes the pH of rain water fall below 6. What is such type of rain called?

• Acid rain

• polluted rain

• low pH rain

About how many people live on Earth today?

• about 100 million

• about 6.7 billion

• about 10 billion

Which term refers to pollution from a source that can be identified?

• groundwater runoff

• nonpoint-source pollution

• point-source pollution

Which are compounds that contain carbon and other elements held together by covalent bonds?

• organic

• covalent

• inorganic

Oxygen enters the body through which system?

• Circulatory

• Endocrine

• respiratory

Complete the diagram:

(A) refers to ...........................

Complete the diagram:

(B) refers to ...........................

Complete the diagram:

(C) refers to ...........................