Chemistry crossword

1. changes - reversible
3. point The temperature at which a substance freezes
5. substance A material that is composed from only one type of particle
9. This is a process that can separate a mixture by making it move through another substance like a paper strip.
11. A barrier with holes
12. of matter Solid, liquid, gas at room temperature
14. of reaction Does the substance react quickly or slowly with other chemicals. Explosions have a very fast rate of reaction
16. Can the substance rust or corrode
17. These particles have more energy than in a solid and vibrate around and can change places with one another
18. Like a sieve with smaller holes
19. These can be used to separate items that are magnetic from non-magnetic items
23. Made up of one type of atom, can't be broken down into anything simpler
26. Is it easily scratched, does it crumble
29. Temporary
31. This exists in one of three states of matter and undergo changes of state to change between them

1. Acid (e.g. vinegar), base (e.g. bicarbonate), neutral (e.g. water)
2. Colour, texture, shape, crystals, shiny, dull
4. Can the substance burn or explode
6. Substances made by combining two or more elements
7. Smallest part of matter
8. Permanent
10. Anything that takes up space and has mass
13. conductivity Its ability to let electricity pass through it
15. point The temperature at which a substance boils
20. conductivity Its ability to let heat pass through it
21. If it dissolves in different liquids
22. changes - irreversible
24. These particles cannot change places as they are held together very tightly in a regular arrangement
25. These particles have a large amount of energy and move around quickly in all directions
27. How heavy it is compared to other substances of the same size
28. Two or more atoms bonded together
30. substance A material that is composed from a mixture of two pure substances