1. Give any one reason why you think that brushing of teeth prevents tooth decay?
2. Give any one example of where refraction of light can be a disadvantage.
3. How does a person get infected with tetanus?
4. Suggest any one way of preventing poultry birds from pecking each other.
5. What is drug abuse?
6. Give the importance of bacteria found in the root nodules of leguminous plants to the soil.
7. Metals are usually painted to prevent them from rusting. How does the paint help in stopping the metal from rusting?
8. If your friend accidentally pours hot milk on his/her hand, what first aid would you give him or her?
9. Give any one reason why you think that mushrooms are similar to fungi.
10. Suggest any one way through which foot and mouth disease is spread among cattle.
11. Give any one sign of syphilis.
12. How is the habit of bees visiting the flowers important to plants?
13. Suggest any one reason why dew is usually formed at night but not during day time.
14. What is the importance of mineral salts in the diet of a child?
15. How do the human actions which are controlled by the spinal cord different from those which are controlled by the brain?
16. Give any one example of the Ball and Socket joint in a human being.
17. Give any one way in which friction is a disadvantage.
18. State any one function of the human kidney.
19. What is the importance of the nursery bed to a vegetable farmer?
20. Give any one reason why you think that a plant is living thing.