The luster of diamond is due to_________?
The luster of diamond is due to_________?
A. Reflection
B. Total internal reflection
C. Refraction
D. None of these
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What are the names of the two stars in the Big Dipper used to locate Polaris?
What are the names of the two stars in the Big Dipper used to locate Polaris?
A. The North Seekers
B. The Pointer Stars
C. The Pointer Sisters
D. None of theseWe always see the same face of the moon, because?
We always see the same face of the moon, because?A. It is smaller than the earth
B. It revolves on its axis in a direction opposite to that of the earth
C. It takes equal time for revolution around the earth and rotation on its own axis
D. It rotates at the same speed as the earth around the sunIn Space, our Body_______?
In Space, our Body_______?
A. Gains Weight
B. Loses Weight
C. No Change
D. Little ChangePrimary cosmic rays are composed largely of very fast__________?
Primary cosmic rays are composed largely of very fast__________?A. Protons
B. Neutrons
C. Electrons
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The light of distant stars is affected by __________ ?A. The earth’s atmosphere
B. Interstellar dust
C. both A and B
D. None of theseThe Sun produces most of its energy by_____________?
The Sun produces most of its energy by_____________?A. Nuclear fusion
B. nuclear fission
C. Burning hydrogen
D. None of these