question: Write a question you would see in a school textbook. OPTIONS:
- transforming the rock into igneous rock.
- chemically changing the rock.
- gradually breaking down the rock into smaller pieces.
- leaving behind sedimentary particles from evaporated solutions.
answer: The freezing and thawing action of water affects a rock by

question: Write a question you would see in a school textbook. OPTIONS:
- airplanes
- automobiles
- telephones
- television
answer: In the first half of this century, which technology allowed people, for the first time, to work IN the city but live OUTSIDE the city?

question: Write a question you would see in a school textbook. OPTIONS:
- Light is refracted by water vapor in the air.
- Light is scattered by water droplets in the air.
- Light is absorbed by water vapor near the ground.
- Light is reflected by water droplets on the ground.
answer:
In clear weather, a bright light can be seen for a long distance. In conditions of heavy fog, the visibility is greatly reduced. Which of the following explains the reduced visibility?