Across
- 4. Chemicals produced in a chemical reaction
- 5. The bending of light as it passes from one substance to another
- 8. A chemical reaction that releases heat energy
- 9. Heat transfer through the vibration of particles
- 11. Heat transfer in a liquid or gas when warmer, less dense particles rise
- 12. A lens that bulges outwards
- 13. Living factors in an ecosystem
- 16. A diagram that represents energy at each level of a food chain
- 17. Tablets or liquid that neutralises stomach acid
- 18. A chemical equation that has the same number of each type of atom on both sides of the arrow
- 21. A simple written description of a chemical reaction
- 22. The plant organelle where photosynthesis takes place
- 24. The distance from one peal of a wave to the next
- 25. Rain that has acids such as nitric acid in it
- 28. A reaction between metals and other chemicals
Down
- 1. A lens that curves inwards
- 2. The number of waves passing a point every second
- 3. Chemicals that take part in a chemical reaction
- 6. Light bouncing off something
- 7. The unit used to measure loudness
- 8. A chemical reaction that absorbs heat energy
- 10. A series of chemical reactions that release energy from glucose
- 11. The big number in front of a chemical symbol in an equation
- 14. A reaction of an acid with a base, forming salt and water
- 15. A reaction with oxygen that releases heat energy
- 19. The green chemical in the chloroplasts of plants
- 20. A simple sugar that provides energy to organisms
- 23. A material that doesn't conduct heat very well
- 26. A non-living factor in an ecosystem
- 27. Connected food chains