Question: You are presented with the quiz "Rust of iron in rocks is a direct result of " But you don't know the answer, so you turn to your teacher to ask for hints. He says that "chemical weathering causes iron in rock to oxidize" and "when iron oxidizes it produces iron oxide, more commonly referred to as rust". So, what's the best answer to the question?
OPTIONS:
- solar heating
- high speed fall from space
- Chemical energy
- The area was once underwater
- permineralization
- Temperature
- volcanic ejection
- chemical weathering
Answer: chemical weathering

Question: You are presented with the quiz "The ground shakes as a result of the movement of what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "an earthquake causes the ground to shake" and "earthquakes are caused by movement of the tectonic plates". So, what's the best answer to the question?
OPTIONS:
- Earth's core
- Electrical energy
- tectonic plates
- kinetic energy
- vehicles
- electromagnetic energy
- earth
- magnetics
Answer: tectonic plates

Question: You are presented with the quiz "What is a purpose of a switch in an electrical circuit?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "aswitch is used to start the flow of current in an electrical circuit" and "electricity flows when a circuit is complete". So, what's the best answer to the question?
OPTIONS:
- to reduce magnetic effects
- heat production
- to annihilate electrons
- preventing heat transfer
- direct energy
- to complete the circuit
- heat is produced
- to circumvent resistors
Answer:
to complete the circuit