Return to Science Grade 2   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 'R' Click on    to hear the word and definition. rain forest a habitat where it rains almost every day  A rain forest can get more than 70 inches of rain each year. ramp a simple machine with a slanted surface  A ramp makes it easier to move from place to place. recycle to use waste to make new things that can be used again  We can recycle paper, glass, cans, and plastic. reflect to bounce off an object  A mirror reflects light. refraction when light bends as it passes through something  Refraction can make something look bigger. repel to push away from  The poles of these magnets repel each other. reptiles animals with scaly skin  Snakes are reptiles. rotate to spin  Earths rotates on its axis. Leave Glossary