Exercise answers
A. State the following statements are true or false:
1. LASER is an abbreviation of Light Amplification by Stimulated Emission of Radiation.
- True
- False
Ans. True
2. The energy that is obtained from food is measured in grams.
- True
- False
Ans. False
3. The chemical symbol for iron is Fe.
- True
- False
Ans. True
4. Nagasaki was the place where an atom bomb exploded for the first time.
- True
- False
Ans. True
5. The colour of red litmus paper changes to Blue in the presence of an acid.
- True
- False
Ans. False
6. Carbon dioxide in the solid form is called as dry coal.
- True
- False
Ans. False
7. According to World health organisation (WHO) the smallpox disease was declared as eradicated and hence non existent in 1979.
- True
- False
Ans. True
8. To test a person for night blindness, the Ishihara test is used.
- True
- False
Ans. False
9. It is common to see high tides on a full moon night.
- True
- False
Ans. True
10. Greenhouse gases mainly methane are said to be present in paddy fields.
- True
- False
Ans. True
11. At room temperature, mercury is the only metal that will be in a liquid state.
- True
- False
Ans. True
12. Isobar is a word used for a line that connects places on a map that have the same temperature.
- True
- False
Ans. False
13. Ungulates is the name given to hooved animals.
- True
- False
Ans. True
14. The logo of the LINUX operating system is a puffin.
- True
- False
Ans. False
15. An alcohol thermometer is used to measure the temperature in the Arctic region.
- True
- False
Ans. True
DO YOU KNOW: (Supporting G.K)
• According to scientist the chicken came before the egg. The evidence given to support this claim is that the protein present in the egg shell is produced only by chickens!
• The US Airforce dropped pamphlets in Hiroshima warning people of bombing before dropping the Atom bomb.
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