understanding living beings

3. Small openings on insects’ bodies used for breathing.
5. The green substance in leaves that helps plants trap the energy of the sun.
6. Liquid in the mouth that helps in digestion.
7. A place where animals live and stay safe.
12. When animals bring out their babies alive.
15. When animals produce young by putting eggs outside their bodies.
17. The process by which plants make their own food using sunlight.
19. A tool used to see very tiny things that cannot be seen with the naked eye.
20. Living things made of many cells like animals and plants.
21. The process of breath in oxygen, beath out carbon dioxide.

1. Body parts like eyes, ears, and nose that help us feel and respond to changes around us.
2. Animals that breathe through lungs, have hair or fur on their bodies, and most of them give birth to live young and feed them with milk.
4. A gas that human's breath out and plants take in for photosynthesis.
8. Living things made of only one cell like Amoeba.
9. Small parts of plants that can grow into new plants.
10. The smallest unit of life that makes up all living things.
11. Organs in the chest used for breathing in humans and many animals.
13. The process by which living things make new offspring.
14. A plant that closes its leaves when touched.
16. Body parts that fish use to breathe underwater.
18. A gas needed by most living things to breathe.
22. Tiny openings on leaves that let gases in and out.