Read the clue. Fill in the crossword puzzle with the correct word. The crossword puzzle will turn green if you are correct! Take a picture of the completed puzzle to show your teacher.
1. trait or behavior that helps an organism survive and reproduce
2. layer of fat that keeps an animal warm
3. green pigment in the chloroplasts that absorbs the energy from the sun during photosynthesis
4. structure in a leaf cell used in photosynthesis that contains chlorophyll
5. trees that lose their leaves for part of the year
6. inactive period of time for a plant or animal
7. trees that keep their leaves all year
8. the task that a structure does
9. chamber of the heart that receives blood from the lungs and pumps it to the left ventricle
10. chamber of the heart that pumps blood to the body
11. the part of plants that moves sugar made in the leaves to other parts of the plant
12. the process in which oxygen and sunlight combine to make sugar
13. organisms that can make their own food from sunlight and oxygen. They have stems, roots, and leaves.
14. chamber of the heart that receives blood from the body and pumps it to the right ventricle
15. chamber of the heart that pumps blood to the lungs
16. thick wall separating the right side of the heart from the left side of the heart
17. openings in the underside of a leaf that allow gases in and out
18. part of the body
19. when two or more organisms live together in a close relationship
20. the part of the heart that separates the chambers and keeps blood flowing forward
21. the part of plants that moves water from the roots up to the leaves
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