Input: Answer this question:
Which of the following organisms produces energy from sunlight?
OPTIONS:
- worm
- rabbit
- hawk
- grass
Answer: grass
*Question*: Louis Pasteur discovered that the bacteria in a substance can be killed by heating the substance for a short period of time. Which of these practices benefited most from Pasteur's discovery? OPTIONS:
- storing foods for longer periods of time
- building ovens and other heating devices
- creating medicines that cure infections
- transporting living organisms without injuring them
*Answer*: storing foods for longer periods of time
question:
Which weather event usually includes heavy precipitation, strong winds, and surface air temperatures below 0°C?
OPTIONS:
- blizzard
- hurricane
- thunderstorm
- tornado

answer:
blizzard
[Q]: While studying the relationship between number of trees and amount of atmospheric oxygen, which of the following would be most important to take into account?
===
OPTIONS:
- contributions to atmospheric oxygen from sources other than trees
- the ways in which industrialized nations use trees
- the root area of trees
- the bark mass of trees
****
[A]: contributions to atmospheric oxygen from sources other than trees
question below:
Two pool (billiard) balls collide, causing each to move in a different direction. Eventually, both come to a stop. The most important factor in causing them to stop is
OPTIONS:
- balance.
- friction.
- gravity.
- size.
answer below:
friction.
Index fossils help scientists estimate the age of a rock because index fossil species only existed for a relatively short time. What happened to the species that are now used as index fossils?
===
OPTIONS:
- They became extinct.
- They changed their diets.
- They hid in marine sediments.
- They migrated to new environments.


They became extinct.