You are presented with the quiz "An image is formed where by the ratio of light out to light in?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "an image in a mirror is formed by reflecting light" and "reflectance is the ratio of light out to light in". So, what's the best answer to the question?
OPTIONS:
- fronts
- Smooth
- segmented
- Joules
- two
- mirror
- an object
- photons

Answer: mirror

You are presented with the quiz "Adding salt to a liquid changes what aspect of the liquid?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "adding salt to a liquid decreases the melting point of that liquid" and "the melting point depends on the nature of the liquid". So, what's the best answer to the question?
OPTIONS:
- salinity
- Dilution
- energy
- nature
- Energy.
- heat
- ligt
- reduce

Answer: nature

You are presented with the quiz "What is erosion?" 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 "smoothed, grooved and polished rocks are produced by glacial erosion". So, what's the best answer to the question?
OPTIONS:
- moonlight
- looseness of dirt or compost
- permineralization
- water vapor
- fog
- The area was once underwater
- fissures of hot, acidic water
- contact between rocks

Answer:
contact between rocks