Across
- 9. machinery of a computer
- 10. substance that makes a chemical reaction happen faster
- 12. the smallest unit into which a substance can be divided without changing its chemical nature
- 13. reaction causing rusting of iron
- 15. the branch of medicine and biology concerned with immunity
- 16. the scientific study of sight and light
- 17. electronic system that records sound or stores information in high-quality
- 18. scientific study of the way that the development of living things is controlled by qualities that have been passed on from parents to children
Down
- 1. screen of a machine
- 2. study of the relationship between living things and their surroundings
- 3. chemical processes in plants or animals that change food into energy
- 4. single celled microscopic animals
- 5. a very small quantity of electromagnetic energy
- 6. branch of physics that deals with heat, work, and temperature, and their relation to energy, entropy
- 7. the form and structure of animals and plants
- 8. this interaction determines the motion of planets, stars, galaxies,
- 9. reaction in which a molecule of water breaks one or more chemical bonds
- 11. machine used for counting
- 14. science that employs the methods and principles of physics and chemistry in the study of astronomical objects
- 15. computer network within an organization