Return to Book List   Glossary   Choose a Letter | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |   List of words for Letter 'E' Click on    to hear the word and definition. Click on the picture to see a bigger picture. Some are animations. earthquake a shaking of the ground caused by shifting of Earth's crust  An earthquake causes Earth to change. endangered in danger of becoming extinct  The giant panda is an endangered animal. energy the power to make matter move or change  Fireworks make light, heat, and sound energy. equator the imaginary line across the middle of Earth that separates the northern part from the southern part  The United States is north of the equator. erosion when water or wind wears something down  The Grand Canyon was caused by erosion. evaporate to change into gas  As the boy's sweatshirt dries, the water will evaporate. extinct when a living thing dies out and no more of its kind are living anywhere on Earth.  The woolly mammoth is extinct. Leave Glossary