1. From which microbes we obtain penicillin?

2. Virus exhibits the characteristics of both living as well as non-living beings.

3. Bacterium responsible for curdling of milk is called:

4. Fungus that grows on the bread is called:

5. Louis Pasteur discovered fermentation.

6. Edward Jenner discovered the vaccine for smallpox.

7. Which of the following is not a combustible substance?

8. Diesel is a secondary fuel.

9. Which zone of a flame has the least temperature?

10. Oxygen is a supporter of combustion.

11. Which of the following types of fuel burn/s completely?

1. Microorganisms can be seen only with the help of a . (Answer: microscope)

2. Bacillus bacteria are shaped. (Answer: rod)

3. Protozoa have structures that allow them to move from place to place. (Answer: locomotory)

4. Cholera, typhoid, polio and jaundice spread through food and water. (Answer: contaminated)

5. Anthrax is an animal disease caused by . (Answer: Bacteria)

6. present in air supports combustion. (Answer: Oxygen)

7. Foam fire extinguisher releases a foam of that surrounds the burning substance and cuts off its air supply. (Answer: CO2)

8. Inflammable substances have very ignition temperature. (Answer: low)

9. zone is the outermost zone of a candle flame. (Answer: non-luminous)

10. A good fuel has ignition temperature. (Answer: high)

11. The sage said, ‘this is a gift for a king’. (Answer: future)

12. The sage handed him a piece of . (Answer: string)

13. The fourth doll is the kind of person. (Answer: best)

14. The prince repeated the . (Answer: process)

15. is Gold. (Answer: Silence)

1. All combustible substance liberate heat and light on burning.

2. Spontaneous combustion starts on its own in the given condition.

3. Insufficient supply of oxygen leads to complete combustion.

4. The luminous zone of candle flame appears yellow.

5. The rate of combustion of liquid and gaseous fuels can be controlled.

6. A sage presented a prince with a set of three small dolls.

7. The prince passed the piece of string through each doll.

8. When the string was put into the ear of the first doll, it came out from its mouth.