| A | B |
|---|
| adaptation | anything about an animal tht helps it live |
| amphibian | an animal that lives both in water and on land |
| blizzard | a storm with heavy snow and strong winds |
| cactus | a plant that can store water in its thick stems |
| camouflage | a way an animal looks that helps it hide |
| centimeter | a unit used to measure length |
| cirrus | clouds that are thin, feathery and high in the sky |
| constellation | a group of stars that form a star picture |
| crater | a hole that has the shape of a bowl |
| cumulus | clouds that look like puffy, white cotton |
| desert | an environment that gets little rain |
| digest | to break down food in the body |
| dinosaur | an animal that lived millions of years ago |
| drought | a long time without rain |
| endangered | in danger of not being alive any more |
| energy | something that causes change and does work |
| environment | all the living and nonliving things in a place |
| esophagus | the tube that goes from your mouth to your stomach |
| estivate | to stay in a deep sleep during the summer |
| evaporate | to change into a gas |
| extinct | no longer living |
| food chain | the order in which animals eat plants and other animals |
| force | a push or pull that makes something move |
| forest | an environment that gets enough rain and warmth for many trees to grow |
| fossil | what is left of a plant or an animal that lived a long time ago |
| gas | only kind of matter that fills all the space in a container |
| germinate | to start to grow |
| gravity | a force that pulls things toward the center of Earth |
| habitat | a place where animals live |
| heart | a muscle that pumps blood to every part of your body |
| heart rate | the number of times a heart beats each minute |
| hibernate | to spend the winter in a deep sleep |
| hurricane | a very large storm with strong winds, high ocean waves and heavy rain |
| insect | an animal that has three body parts and six legs |
| irreversible | Not able to be changed back |
| life cycle | all the parts of an animal's life from birth to death |
| liquid | a form of matter that does not have its own shape |
| litter | trash that is not put in a trash can |
| living | growing and changing |
| loudness | a measure of how loud or soft a sound is |
| lungs | body parts that help you breath |
| magnet | a piece of iron or steel that attracts or pulls iron or steel |
| mammal | an animal that has fur or hair |
| mass | the amount of matter an object has |
| matter | the material that all things are made of |
| medicine | a produce that helps people when they are sick or hurt |
| migrate | to move as a group to live in another place |
| milliter | a unit used to measure the volume of a liquid |
| mixture | two or more things that have been put together without being changed |
| moon | the object that appears the largest in the night sky |
| moonlight | the light from the moon |
| motion | the act of moving |
| muscles | body parts that move your bones and do other jobs |
| music | a combination of sounds that people enjoy |
| natural resource | something found in nature that people can use to meet their needs |
| nonliving | not alive |
| nutrients | minerals |
| orbit | the path around something |
| paleontologist | a scientist who finds and studies fossils |
| permanent teeth | new adult teeth |
| pitch | a measure of how high or low a sound is |
| planet | a large ball of rock or gas that moves around the sun |
| pollution | waste that harms land, water or air |
| pond | freshwater environment |
| property | a quality of something |
| rain forest | an environment where rain falls almost every day |
| reconstruct | to rebuild |
| recycle | to use materials to make new things |
| reptile | an animal that has scales and rough, dry skin |
| resource | anything that people can use |
| reuse | to use something again |
| reversible | able to be changed |
| rock | a hard nonliving thing that comes from Earth |
| rotation | the spinning of the Earth |
| saliva | the liquid in your mouth |
| season | a time of the year |
| seed coat | a covering that protects like a seed |
| seedling | a young plant |
| skeleton | the bones of a body |
| soil | teh loose top part of the Earth's surface |
| solar energy | light and heat from the sun |
| solar system | the sun and its nine planets |
| solid | the only form of matter that has shape of its own |
| sonar | a way to use sounds to locate objects underwater |
| sound | energy that you can hear |
| star | a large ball of hot gases |
| stomach | a body part made of muscles that squeeze food and mix it with juices |
| stratus | low, gray clouds that stretch across the sky |
| sun | the star closest to the Earth |
| temperature | a measure of how hot or cold something is |
| thermometer | a tool that measures temperature |
| thunderstorm | a storm with rain, thunder and lightning |
| tornado | a funnel shaped spinning cloud |
| transportation | ways to move people or things |
| triceratops | a dinosaur with three horns on its head |
| tundra | a place with a cold, windy environment and no trees |
| vibrate | to move back and forth |
| water cycle | the movement of water from the air to the land and back to the air |
| water vapor | water that has changed into a gas |
| weather | the way the air is outside |
