Earth
What is the process of a river washing away its riverbanks called?
Reveal Answer
What did ancient farmers probably use to tell the passing of seasons?
Reveal Answer
In the United States, summer officially begins in which month?
Reveal Answer
What type of scientist studies microscopic plants and animals?
Reveal Answer
What is the study of atmospheric conditions and climate called?
Reveal Answer
If an organic material is converted into stone, it becomes what?
Reveal Answer
What kind of gas is central in terms of the effect global warming?
Reveal Answer
If the beach loses 3 feet of sand each year, how many feet will it lose in 15 years?
Reveal Answer
What is the imaginary line that runs around the Earth halfway between the poles called?
Reveal Answer
What water movement is similar to a jet stream in the air?
Reveal Answer
What periods of the Earth's history had glaciers covering a lot of the Earth?
Reveal Answer
What polluting material can choke an animal by getting caught around its neck?
Reveal Answer
What natural disaster is caused by earthquakes but could also be caused by an asteroid?
Reveal Answer
What is the name of the single continent that existed early in Earth's history?
Reveal Answer
What is a seven-letter word meaning "movement of weathered material from gravity"?
Reveal Answer