Vocabulary
Across
- 4. to put things in groups according their type
- 6. a sieve which lets through liquids and dissolved substances but not insoluble substances
- 7. a push or a pull that tries to change the position or shape of an object
- 9. That contains dissolved nitric oxides or sulfur dioxide; these compounds make the rain acidic
- 11. a cloudy mixture of insoluble solid particles in a liquid
- 13. an animal that is eaten by another animal (a predator)
- 15. the process of removing of waste products from the body
- 16. the process of breaking down food into very tiny particles
- 18. a particular type of plant or animal
- 19. the amount of force that pulls objects towards the Earth
- 21. to divide or split something into different parts
- 23. when substances are mixed together and change chemically to form a new substance
- 26. Special tubes that carry the blood
- 27. a mixture of one substance in another, where the dissolved substance can no longer be seen
- 30. the force that pulls objects towards the Earth
- 32. a way to describe the feeding relationship between plants and animals
- 33. cannot be changed back to what it was before
- 35. forms by when two or more different substances mixed together but are not chemically joined
- 37. the gradual increase in temperatures throughout the world
- 38. a living thing (usually an animal) that eats another plant or animal
- 39. the tube that carries air from the nose and mouth to the lungs and back again
- 40. removal of trees by humans
Down
- 1. a piece of equipment for measuring current, voltage and resistance
- 2. Regions with very little rainfall
- 3. The force caused by air pushing against moving objects
- 5. substances which cause pollution
- 8. when something has energy, it can make things move and cause things to change; all living things need energy to exist
- 10. The way we take air into our bodies and let it out of our bodies
- 12. the organ which breaks down food into tiny particles that can move into the blood; undigested food is pushed out at the end of the intestines
- 14. another name for air resistance
- 16. when a substance, often a solid, mixes with a liquid and becomes part of the liquid
- 17. the unit used to measure weight
- 20. to re-process something and make into a new product
- 22. a plant that produces energy from sunlight
- 24. can be changed back to what it was before
- 25. the amount of matter in an object, measured in kilograms
- 28. – cannot dissolve
- 29. a consumer that eats other animals (which are their prey)
- 31. the amount of energy transferred when a force makes an object move work
- 32. a force which tries to stop things sliding past one another
- 34. When two forces acting on an object are equal and opposite
- 36. The organ that controls all body functions
- 38. The pumping of blood all around the body