Question:
Which human body system attacks viruses and bacteria once they have invaded the body?
OPTIONS:
- circulatory
- endocrine
- digestive
- immune
Answer:
immune
Question:
Which describes the role of sexual reproduction in plants and animals?
OPTIONS:
- keeps all organisms looking similar
- ensures the continuation of the species
- produces offspring that are identical to the parents
- increases the size of any population over a long period of time
Answer:
ensures the continuation of the species
Question:
Which would provide evidence of seafloor spreading?
OPTIONS:
- higher levels of salinity in the ocean water
- stronger currents at the surface of the ocean
- cooled magma found on the edge of the plates
- greater reproduction levels for organisms at the bottom of the ocean
Answer:
cooled magma found on the edge of the plates
Question:
What is a disadvantage of using moving water to produce electricity?
OPTIONS:
- Power is produced inexpensively.
- Air pollution is produced.
- Oil spills may occur.
- The local ecosystem may be disrupted.
Answer:

The local ecosystem may be disrupted.