Available Answers

1. 1.

   Choose the best answer.

   1. The number of bones in the human body is
      1. 165
      2. 206
      3. 300
      4. 650
   2. The force that pulls things towards the Earth is called
      1. pulley
      2. heat
      3. energy
      4. gravity
   3. India is one of the few countries in the world with the ability to produce this energy.
      1. neat
      2. nuclear
      3. sound
      4. electrical
   4. Injecting a person with a small dose of the germs that cause a disease is called
      1. ventilation
      2. inoculation
      3. pasteurisation
      4. pollution
   5. When you pull your foot away automatically from a thorn it is called
      1. voluntary action
      2. reflex action
      3. nervous action
   6. Malaria is caused by the bite of a female
      1. flea
      2. larva
      3. fly
      4. mosquito
   7. The energy given off by the sun is called
      1. solar energy
      2. mechanical energy
      3. nuclear energy
   8. The force that slows moving objects down is called
      1. motion
      2. gravity
      3. friction
      4. weight 
2. 2.

   Fill in the blanks.

   1. In science, work means using __________ to move an __________.
   2. __________ __________ was the first scientist to understand about gravity.
   3. Wheels that have teeth are called __________.
   4. It is easy to pull water from apart a well by using a __________.
   5. A screw is really an __________ __________ in the form of a spiral.
   6. Things can be forced apart or cut by using a simple machine called a __________.
   7. Air is made up of different __________.
   8. Some factory-packed foods have chemical __________ in them.
   9. The __________ can burrow through human skin.
   10. Fungi can grow on the body and cause __________.
   11. Diseases that are passed from person to person are called __________ diseases.
   12. Vaccination was given for the first time by __________.
3. 3.

   Mark the sentences √ or x.

   1. The bite of a male mosquito causes malaria.
   2. Anaemia is a disease of the blood.
   3. The ankle has a ball and socket joint.
   4. Germs cannot breed easily in frozen food.
   5. The triceps is a bone in the arm.
4. 4.

   When in the body would you find the cardiac muscles? What is its function?
5. 5.

   Which bones protect the spinal cord? What shape are they?
6. 6.

   In what ways may germs enter your body? How can one reduce the numbers entering here?