Key stage 3 Science Exercise
1. Atoms are made up of _________ particles.
2. _______ was the first scientist, who explained about atoms.
3. An element is a substance made up of only one type of __________.
4. A compound is made up of _________ elements.
5. Compounds are formed from _______ .
6. A mixture is composed of __________ elements.
7. A mixture can be __________ easily.
8. A mixture can be separated by filtration, evaporation, chromatography and __________ .
9. Rock salt is a mixture of __________ .
10. Chromatography is suitable for _____ and inks.
11. Simple distillation method is used for separating out a mixture of a ______ and a liquid.
12. Fractional distillation separates a mixed liquids like __________ .
13. Mostly metals are very ________ .
14. Metals _______ energy.
15. Metals conduct ______ .
16. Metals are also _____ .
17. Metals have high ______ .
18. Metals are good conductors of __________ .
19. Non-metals are ________ conductors.
20. Non-metals are not _______ enough.
Answers: 1. tiny 2. Dalton 3. atom 4. two or more 5. chemical reaction 6. two or more 7. separated 8. distillation 9. salt and sand 10 dyes 11.solid 12. crude oil 13. strong 14. conduct 15. electricity 16. malleable 17. density 18. heat 19. poor electrical 20. strong