CBSE Class 8 Science Chapter 4 Combustion And Flame Short Answer Questions
Question 1. We were told that food is a fuel for our bodies. Why?
Answer: The food that we eat is broken down in our body by reaction with oxygen, and energy is produced, which is utilised by our body as a fuel.
Question 2. We have read that the Sun produces its heat and light. Is it also some kind of combustion?
Answer: No, it is not combustion. The heat and light in the Sun are produced by nuclear reactions.
Read And Learn More CBSE Class 8 Science Short Answer Questions
Question 3. Why is it important to know the telephone number of the fire service in your area?
Answer: It is important to know the telephone number of the fire service so that, in case of a fire, the fire brigade can reach on time and extinguish the fire.
Question 4. Why should we never sleep in a room with a burning or smouldering coal fire?
Answer: It is because carbon monoxide gas produced can kill persons sleeping in the room with a burning or smouldering coal fire.
Question 5. If you hold a piece of iron wire with a pair of tongs inside a candle flame or a Bunsen burner flame, what will you observe? Will it produce a flame?
Answer: The Iron wire will become red hot and glow. It will not produce a flame.
Question 6. Boojho wants to separate the following materials as combustible and non-combustible. Can you help him? Charcoal, chalk, stone, iron rod, copper coin, straw, cardboard, glass, paper, candle, wood,
Answer:
- Combustible — charcoal, straw, cardboard, paper, candle, wood.
- Non-Combustible- Chalk, Stone, iron rod, copper coil, glass.