Across
- 6. A measure of the biological variety in an area
- 7. The change in direction of a light on passing from one medium to another because of change in speed
- 8. a good conductor of electricity
- 11. strong rings that surround trachea
- 12. An environment that supports life
- 16. process of solid changes into liquid
- 17. The mix of atmospheric events happening in a particular place at a particular time
- 18. The increase in the concentration of a substance in an organism over time
- 22. powerhouse of the cell
- 26. green light + blue light =
- 27. A species that is introduced by humans
- 28. a place where a living organism lives
- 30. The change in direction of a light ray after it hits a surface and bounces off
Down
- 1. Objects made from rock that orbit the Sun
- 2. A chemical that is used to kill the pests that destroy human crops
- 3. a substance needed for respiration
- 4. Made of dust, gas, stars and solar systems
- 5. Range of colours that can be seen in white light
- 9. a protein that carries oxygen in red blood cells
- 10. blue light + red light =
- 11. consist of more than two elements that are joined a chemical bond
- 13. A biodegradable material that comes from renewable sources
- 14. a gas that occupies the most in the air
- 15. dioxide Gas that turns limewater cloudy
- 19. Average weather in an area and takes several years to change
- 20. chemicals produced to kill pathogens in body
- 21. bacteria and virus that causes illness
- 23. Splitting light into different colours
- 24. A very small particle of an element
- 25. windpipe
- 29. air sacs