Sorting materials into groups Worksheet-5

Sorting materials into groups Worksheet-5

True/False:

1. The atoms or molecules in solids have no motion.
2. Energy must be removed from a liquid to change it to a solid.
3. Molecules move faster in the gas phase than in the liquid phase.
4. Nitrogen changes from its liquid state to its gaseous state at the same temperature at which water changes from its liquid state to its gaseous state.
5. There is enough energy in air at room temperature to change some liquids to gases.
6. Carbon dioxide can change directly from the solid phase to the gaseous phase.
7. Mercury is a transparent metal.
8. A mirror is opaque.
9. An oily thin paper sheet will be a transparent material.
10. A paper is transparent but ink is not transparent.
11. Turmeric powder used in our food is soluble in water.
12. All objects are made up of only one kind of material.
13. Things made of copper and aluminium have lustre.
14. Materials are grouped for our convenience to study their properties.
15. Sorting of materials into groups is done on the basis of similarities and not differences in their properties.
16. Glass, water and air form a set of transparent materials.
17. Sugar does not dissolve in water.
18. Stone is transparent, while glass is opaque.
19. A piece of wood floats on water.
20. Sand settles down in water.
21. Oil dissolves in water.
22. Chalk dissolves in water.
23. Vinegar dissolves in water.

Answer key:

1. True
2. True
3. True
4. False
5. False
6. True
7. False
8. True
9. False
10. False
11. True
12. False
13. True
14. True
15. False
16. True
17. False
18. False
19. True
20. True
21. False
22. False
23. True