Chapter 5: Materials, Substances and Particles

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