Across
- 4. Something that blocks or stops things from passing through.
- 7. The organs that help you breathe in oxygen and breathe out carbon dioxide.
- 8. The beat you can feel in your wrist or neck as your heart pumps blood.
- 11. A material that does not let heat or electricity pass through easily.
- 12. dioxide A gas that we breathe out and plants use to make their food.
- 15. The substance that dissolves in a liquid.
- 16. Very tiny pieces that everything in the world is made of.
- 17. To make a good guess about what might happen next.
- 20. Keeping clean to stay healthy and stop germs from spreading.
- 22. A muscle under your lungs that moves to help you breathe.
- 24. A living thing that survives by taking nutrients from another animal or plant.
- 25. When a sperm and an egg join to start the beginning of a baby.
- 26. An animal that carries and spreads diseases from one place to another.
Down
- 1. When a girl or woman’s body releases blood each month as part of the reproductive cycle.
- 2. Watching something carefully to learn or notice what is happening.
- 3. The new substances made after a chemical reaction happens.
- 5. The substances you start with before a chemical reaction happens.
- 6. A blood vessel that carries blood back to the heart.
- 9. The time when a child’s body starts to change into an adult’s body.
- 10. vessels Tiny tubes inside the body that carry blood everywhere.
- 13. A blood vessel that carries blood away from the heart.
- 14. The liquid that something dissolves into.
- 18. The tube that carries air from your mouth and nose to your lungs.
- 19. A material that allows heat or electricity to pass through easily.
- 21. Chemical messengers in the body that tell organs what to do.
- 23. A substance that keeps insects or animals away.