input: OPTIONS:
- lever
- pulley
- wheel
- inclined plane Now, answer this question: Q: A highway that switches back and forth as it climbs up a steep hillside, yeilding a much gentler slope, is an example of what simple machine? A:
A:
output: inclined plane

Q: Which gas do people exhale during each breath? A:

OPTIONS:
- carbon monoxide
- nitrogen
- oxygen
- carbon dioxide

Answer: carbon dioxide

Problem: OPTIONS:
- gravitational pull
- specific speed
- apparent motion
- periodic motion
Q: Q: What term describes motion that repeats itself at regular time intervals, such as exhibited by a vibrating guitar string? A:
Answer: periodic motion

Problem:OPTIONS:
- digestion
- fight or flight
- hormones
- immune

Q: An antigen is a molecule that reacts with some component of the what response? A:
****
A: immune

Q: Synthesis, decomposition, replacement, and combustion are all types of what reaction? A:
OPTIONS:
- natural
- toxic
- mineral
- chemical
chemical

Q: Surface tension is responsible for the fact that small insects can do this on water? A:
OPTIONS:
- swim
- sink
- float
- walk

Answer:
walk