Page 131 - Active Science 5 Ebook and Activity

B. Fill in the blanks.

1. Everything around us is made up of ________________.
2. Molecules are made up of different ________________.

3. Particles are more tightly packed in ________________ than in _______________.
4. ________________ are the tiniest building blocks of matter.
5. A physical change is ________________ and reversible.

C. State whether the following statements are true or false.
1. The force of attraction in gases is high. ________
2. Chemical changes are reversible. ________
3. Intermolecular space in gases is very large. ________
4. When two or more substances are put together and they never combine,
a mixture is formed. ________
5. In physical change, a new substance is formed. ________

D. Match the following.

1. The cooking of egg is a a. atom
2. Tiny particles formed when two or more atoms combine. b. melting
3. Process of changing a solid into a liquid c. physical change

4. Tiny particles that form building blocks of matter. d. chemical change
5. Change of water into water vapour e. molecules

E. Write two:
1. Properties of liquid ____________________________________________________
____________________________________________________

2. Properties of gases ____________________________________________________
____________________________________________________

3. Properties of solids ____________________________________________________
____________________________________________________
4. Examples of physical change ____________________________________________________

____________________________________________________
5. Examples of chemical change ____________________________________________________

____________________________________________________

F. Long Answer Questions.
1. Explain three characteristics of solids.

2. What happens when water is heated?
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