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Everyday Science Questions & Answers Section 159

Ques No.1: _________ is A telecommunication link between the rulers of countries.

Ans: Hotline

Ques No.2: Sparkling red colour after the blast of fire cracker is due to the presence of _______.

Ans: Sulphur

Ques No.3: Bat has the highest upper limit of ___________.

Ans: audible range

Ques No.4: The process of elimination of water from any system is called _________.

Ans: Dehydration

Ques No.5: An iceberg is floating in sea. _________ of its mass will remain above the surface of water.

Ans: One tenth

Ques No.6: _________ is commonly used in balloons and airships.

Ans: Helium gas

Ques No.7: The Sun remains visible for some time after it actually sets below the horizon. This happens due to ___________.

Ans: Atmospheric Refraction

Ques No.8: Radioactivity was first discovered by _________.

Ans: Henry Becquerel

Ques No.9: A lake starts freezing because of the cold atmosphere. It will first __________.

Ans: freeze at the top surface

Ques No.10: ________ is present in the largest amount in terms of per cent by mass in the earth‘s crust.

Ans: Oxygen

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