Question: You are presented with the quiz "What sea creature can sometimes be microscopic?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "some mollusks are nearly microscopic" and "interestingly, a squid is also a mollusk". So, what's the best answer to the question?
OPTIONS:
- squids
- a fish
- fungi
- tortoises
- fossils
- barnacles
- bacteria
- alpacas
Answer: squids

Question: You are presented with the quiz "The mass of a planet causes the pulling force that does what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "the mass of a planet causes the pull of gravity on that planet" and "gravity is the pulling force that holds objects to the surface of a planet". So, what's the best answer to the question?
OPTIONS:
- holds objects to its surface
- deadly and devastating
- a tree falling
- principals of aerodynamics
- causes weather
- to move people
- forces air to the surface
- changes rotations
Answer: holds objects to its surface

Question: You are presented with the quiz "What causes water to stay on earth's surface?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "gravity pulls objects towards planets" and "because of gravitation, objects that are on or near the earth are pulled toward it". So, what's the best answer to the question?
OPTIONS:
- Clouds
- Planets
- rainfall
- friction
- Gravity
- sun's heat
- Dirt
- forces
Answer:
Gravity