Available Answers

1. 1.

   State True or False.

   1. Simple machines make our work difficult.
   2. A pulley is a type of wheel and axle.
   3. Cough can be spread through air.
   4. Plastic is a biodegradable waste.
   5. A set of practices performed especially through cleanliness for a healthy life is called hygiene.
   6. Butterfly is an example of a vector.
   7. In a lever, the weight of the body on which the work is to be done is called effort.
   8. Trachoma is an eye disease.
   9. We should skip our meals to stay healthy.
   10. A knife is an example of a fixed pulley.
   11. Vectors carry and transmit germs.
   12. We should clean our tongue only once a month.
   13. We should wash our hands before and after meals.
   14. In class-three levers, the effort is applied in between the load and the fulcrum.
   15. Typhoid is caused through air.
   16. A wedge is a type of an inclined plane.
   17. WHO stands for World Health Organization.
   18. Conjunctivitis is spread through direct contact.
   19. A nutcracker is an example of class-one lever.
   20. A movable pulley moves with the load.