Earth's thin, rocky outer layer is its

a. core.

b. mantle.

c. crust

d. outer core.

Which of the following is true of Rwanda and Burundi? A. They have both driven out their Hutu populations. B. They are Africa's most densely populated countries. C. They were former British colonies. D. They both border Lake Victoria

Whats a smaller river or stream that connects to a larger one

Based on the article, describe the relationship between population growth, consumption, and the environment

The Köppen classification system is used as a classification system for

Which of the following countries has had incredible success growing crops under arid conditions? Yemen Bahrain Israel Lebanon

What are some of the impacts of humans on the earth?

Astronomers can find the distance to an object if they know the object's true brightness. one way they regularly estimate the true brightness of a galaxy is to observe

What was called the dark continent?

What happens to shadows as the seasons go from winter to summer? A. Shadows get longer. B. Shadows are the same all year round. C. Shadows get shorter. D. There are no shadows.

The terrorist groups in Italy and Peru both wanted to A. gain personal freedom. B. separate from the country. C. unite various ethnic groups. D. overthrow the existing government.