Deepak Divya lessons

1. What's our normal body temperature?   37 degrees celcius.
2. What causes tuberculosis? Germs in milk
3.  What do burning things use?  Oxygen
4. What cuts the oxygen supply in the fire extinguisher?The foam 
5. What is burnt in our body to give heat energy? food
6. What is used to measure the body temperature ? Thermometer.
7. Which energy is absorbed when Ice melts into water? heat
8. What are called conductors?Substances which allow heat to pass through them.
9. What does fuel on burning give? heat.
10. Which are the flammable substance?paper, cloth 
11. because they catch fire soon
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13. Pasteurization> the method of killing germs in milk by heating it to a very high temperature  and immediately cooling it to a very low temperature is called.
14. What is physical change?The change in which no new substances are formed  and are mostly reversible.
15. What are insulators? Substances which do not  allow heat to pass through them 
16. what is reversible process?
17. The newly formed products can be changed to its original sgate on changing the condition.Ex; melting of ice
18. solidification of coconut oil  or ghee.
19. What is irreversible process? The newly formed products cannot be changed into its original state.
20. Which animals are warm blooded?The animals which can maintain constant body temperature. throughout the year.
21. ex: Human beings,birds
22. Which animals are cold blooded?
23. Those animals that cannot maintain  a constant body temperature It varies with outside temperature.
24. It is dangerous to run when clothes catch fire
25. This will catch more fire flames big,bigger, and can cause more damage.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
26. Evaporation: Physical change where heat is absorbed.
27. Condensation: Physical change where heat is taken away or given out.
28. What change happens when cooking of rice?
29. chemical change.
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