Science!

5. This force allows things to be stretched and then returns to its original form.
6. The flow of heat through solids.
8. Birds that have a layer of fat under their skin to keep them warm.
9. What force pulls things down to Earth?
12. The muscles in our body can exert _______.
13. The two sources of electricity are ________ and electric cells.
15. Special liquids that can kill germs and clean floors and toilets.
16. A poisonous liquid that can be found in the thermometer.

1. To save ____________ at home, we use a fan instead of air conditioner.
2. This gas is needed for burning.
3. The appearance of the Moon changes at different times of the month, these are called ____________ of the Moon.
4. What part of the teeth we use to grind and crush our food into pieces?
7. Parents pass on their _________________ to their young.
10. Drugs that are useful to relieve pain and cure/prevent sickness.
11. To 'switch on' means to __________ a circuit.
14. This protects the flower in the bud stage.