The center of the earth is about 3,960 miles (6,373 kilometers) under you. Have you ever thought about what's between you and the earth's core? If you thought it was just cold, solid rock, think again!

Part of a 24-book series that covers the four main branches of science—physical science, life science, earth and space science, and science and technology, and covers essential content standards. Students will build their scientific knowledge, increase their content vocabulary, and sharpen critical nonfiction comprehension skills. Books are 6 5/8" x 9 1/8"