Rivers and mountain ranges are examples of boundaries

What country lies between Croatia and Siberia

Why are source rocks always sedimentary? a. Sedimentary rocks are most abundant at the surface. b. Sedimentary rocks are the only rocks formed in the ocean. c. Sedimentary rocks contain pores for plankton to live in. d.

True or false most cells are easy to observe

The scale on a map uses 3 centimeters to represent 4 kilometers. The distance between two towns on the map is 6 centimeters. How many kilometers apart are the towns?

Each Earth day is 24 hours long. Which statement explains why? A. It takes Earth 24 hours to rotate once on its axis. B. It takes the moon 24 hours to rotate once on its axis. C. It takes the moon 24 hours to complete one orbit of Earth. D.

What causes a comet's tail to form? solar wind entering Earth's atmosphere reflection of light from the moon impact with a planet

What are some of the economic challenges facing the Ukraine?

What is another way to measure the size of Africa? O Population O Animals Mountains Lakes

Name the model of the solar system that places at it's centre the sun?

A mineral or combination of minerals that contains metals or other substances in useable amounts is called a an