Q: Q: A doorknob and a ferris wheel are examples of what type of simple machine? A:

OPTIONS:
- ball and socket
- lever and pulley
- ball and axle
- wheel and axle

A: wheel and axle

input: OPTIONS:
- six
- ten
- four
- two Now, answer this question: Q: How many low and high tides occur per day? A:
A:
output: two

Q: Saturn is made mostly of helium and what else? A:

OPTIONS:
- nitrogen
- carbon
- hydrogen
- hydrogen

Answer: hydrogen

Problem: OPTIONS:
- centrifugal
- supramolecular
- gravitational
- intermolecular
Q: Q: The boiling points of liquid also correlate to the strength of which forces? A:
Answer: intermolecular

Problem:OPTIONS:
- aquiomes
- tundra
- water biomes
- marine biomes

Q: Aquatic biomes in the ocean are called what? A:
****
A: marine biomes

Problem:OPTIONS:
- difference in wind
- difference in elevation
- difference in temperature
- difference in charge

Q: What causes lightning during a thunderstorm? A:
****
A:
difference in charge