Q: A wind turbine primarily uses which type of energy? OPTIONS:
- nuclear
- thermal
- chemical
- mechanical
A: mechanical

Q: Which situation is the best example of ecological succession? OPTIONS:
- An organism survives a difficult winter.
- The populations in an area remain the same.
- One species replaces another species in an ecosystem.
- Each of several species uses the same amount of resources.
A: One species replaces another species in an ecosystem.

Q: Which of the following is a similarity 20 between x-ray waves and sound waves? OPTIONS:
- Both transfer energy.
- Both require a vacuum.
- Both have the same speed.
- Both have the same frequency.
A: Both transfer energy.

Q: The cows in a rancher's herd of cattle have been selectively bred to produce milk. Which of the following will cause the next generation of cows to receive the trait for producing large quantities of milk? OPTIONS:
- nutrients in the cows' food
- essential minerals in the cows' water
- electrical impulses in the cows' brains
- information in the cows' chromosomes
A:
information in the cows' chromosomes