Page 28 - ICSE Chemistry 8

Review Your Learning

A. Answer in one word/a few words.

1. Two examples of solids from your bedroom _____________ ___________
2. Two examples of liquids from your surroundings _____________ ___________

3. Two examples of gases _____________ ___________

4. The law that states that mass can neither be created
nor destroyed __________________________

B. State whether the given statements are true (T) or false (F).
1. Anything that occupies space and has mass is called ma er.

2. Solids do not occupy space.

3. The molecules in liquids are closely packed.
4. Strong intermolecular force of a rac on exists between the par cles of solids.

C. Explain the following terms.

1. Intermolecular force of a rac on
2. Intermolecular space

3. Kine c molecular theory of ma er

4. Law of conserva on of mass

D. Answer the following ques ons.

1. How are the three states of ma er diff erent from each other?
2. Write the postulates of kine c molecular theory of ma er.

3. Discuss how does mass of a substance change during a physical change and chemical change.
4. How can you show that mass remains constant during a chemical change or a chemical reac on?

PROJECT

Create a PowerPoint presenta on on the topic ‘Law of Conserva on of Mass’. Find the related informa on
and images using the Internet. Add audio and visual eff ects to your presenta on. Format it as per your choice.

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