Across
- 1. the change from a liquid into a solid
- 4. the model that describes the way particles in matter are arranged and how they move about
- 6. the matter that an object is made of
- 7. materials can be solids, liquids or .........
- 12. a change in which no new substance is formed
- 13. each substance has its own properties
- 15. it is a special type of material that can draw water from the air created by the scientists from Singapore in 2020
- 16. a brown layer formed when iron reacted with water and air
- 17. materials can be ........ or human-made
- 18. the change from a liquid into a solid
Down
- 2. they study the chemical reactions take place when food products are made
- 3. a process that results in the formation of one or more new substances
- 5. the particles in solids have ........... because they are packed very closely together
- 8. something that is made of one type of matter
- 9. it is a solid but can behave like a liquid because it is made up of many small grains
- 10. one of the examples of physical changes
- 11. the change from a solid into a liquid
- 13. tiny units that make up matter
- 14. when a liquid is cooled, its particles ..........