You are presented with the quiz "Contact between what over long periods of time causes them to smooth?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "contact between rocks over long periods of time causes rocks to smooth" and "granite is rock formed by fire". So, what's the best answer to the question?

OPTIONS:
- graptolites
- Smooth music.
- Contact lenses.
- calcite
- Granite.
- loose soil
- rivers
- Time periods.

Answer: Granite.

You are presented with the quiz "timing is critical for what occurs when a what and an egg fuse?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "fertilization occurs when a sperm and an egg fuse" and "fertilization As far as fertilization, timing is critical". So, what's the best answer to the question?

OPTIONS:
- Cooking
- Flowers
- fusion
- embryos
- pollen
- seeds
- heat
- sperm

Answer: sperm

You are presented with the quiz "What has a negative impact on the body?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "disease-causing microbes have a negative impact on the body" and "microbes are microscopic, single-celled organisms without a nucleus". So, what's the best answer to the question?

OPTIONS:
- photons
- exposure to cold
- abundant food
- influenza orthomyxoviruses
- disease-causing organisms
- smallest agents of disease
- rocks
- a tree falling

Answer: disease-causing organisms

You are presented with the quiz "What, if heated, evaporates while salt remains?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "heating salt water causes the water to evaporate while the salt remains" and "most of Earth's water is salty seawater". So, what's the best answer to the question?

OPTIONS:
- hydration
- Energy.
- spring
- Solar energy
- seawater
- salinity
- Solutions
- energy

Answer:
seawater