Across
- 2. What is the three-dimensional space occupied by an object called?
- 4. Name the preserved remains of once-living organisms.
- 6. Which component of living things needs nitrogen?
- 9. Which process is used by the producers to make energy?
- 10. Name the gas that is lighter than air.
- 13. Which structure of the eye is most sensitive and has no blood vessels?
- 14. What does the transport system of a plant called?
- 15. What is the abbreviation of DNA?
Down
- 1. Name the chemical used to kill or reduce the growth of plants like weeds.
- 3. Plants whose seeds are naked are called?
- 5. Which acid is secreted by the stomach?
- 7. What describes the energy transfer from one living to another?
- 8. What is the only source of energy for producers?
- 11. What is the sticky substance that is produced by the nose, trachea, and other glands of animals/humans?
- 12. Which type of soil hardens after drying up?