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SAI INTERNATIONAL SCHOOL

Subject–Chemistry
Class – VIII
Topic – Combustion and Flame

CONCEPT MAP

Home Assignment
Concept –Combustion

1. What do you mean by combustion? 1

2. What is a combustible substance? 1

3. What do you mean by non-combustible substances? 1

4. Give two examples of combustible substances. 1

5. Give two examples of non-combustible substances. 1

Concept –Conditions necessary for combustion.

1. What do you mean by ignition temperature? 1

2. Which of the two has a lower ignition temperature, LPG, or wood? 1

3. Name the component of air necessary for combustion. 1

4. What is inflammable substance? 1

Concept –History of the matchstick.

1. Where were matchsticks first used? 1

2. What are the components of a matchstick? 1

3. One of the components of a matchstick was replaced, why? 1

Concept –How do we control fire?

1. Why water should not be used in case of fire due to short circuit? 1

2. Which is the most common fire extinguisher? 1

3. What should be done if the cloth of a person catches fire? 1

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