Universe - Section 1

21:

Thesunspots cause

A.	aurora borealis and aurora laustralis
B.	magnetic storms on the surface of the sun
C.	polar auroras
D.	all of these
	Answer Report Discuss
	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

22:

'Parsec' is the unit of measurement of

A.	density of stars
B.	astronomical distance
C.	brightness of heavenly bodies
D.	orbital velocity of giant stars
	Answer Report Discuss
	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

23:

What are Sun spots?

A.	Regions on earth without winter clirnate
B.	Desert areas on the Sun
C.	Dark patches on the surface of the Sun which are cooler areas
D.	Dark patches on the surface of the Sun resulting from a localised fall in the temperature to about 4000"K
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	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

24:

The strongest evidence that comets are members of our solar system comes from

A.	their composition
B.	their effecl on the lives of man
C.	the shape of their orbits
D.	the shape and length of their tails
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	Option: C Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

25:

Stars which ~ppear single to the naked eye but are double stars when observed· by a telescope are known as

A.	Cosmic stars
B.	Quasars
C.	Binaries
D.	Novae and supernovae
	Answer Report Discuss
	Option: C Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

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