# Ultimate Science Knowledge Quiz

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| By Anshul
A
Anshul
Community Contributor
Quizzes Created: 1 | Total Attempts: 590
Questions: 5 | Attempts: 590

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Welcome to my science quiz. . . . May be a liitle hard. . . .
Hope you njoy it!

• 1.

### The time interval between two beats of a normal human heart is..

• A.

2 sec

• B.

1 sec

• C.

0.5 sec

• D.

3 sec

B. 1 sec
Explanation
The time interval between two beats of a normal human heart is 1 second. This is because the average resting heart rate for adults is typically around 60-100 beats per minute, which translates to 1 beat per second. The heart contracts and relaxes in a rhythmic pattern, with each beat representing a complete cardiac cycle. Therefore, the correct answer is 1 sec.

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• 2.

### The isotope of crbon used for radio carbon dating is....

• A.

Carbon 12(C-12)

• B.

Carbon 11(C-11)

• C.

Carbon 14(C-14)

• D.

Diamond(C-90)

C. Carbon 14(C-14)
Explanation
Carbon 14 (C-14) is the isotope of carbon used for radio carbon dating. This is because C-14 is a radioactive isotope that is present in the atmosphere and is incorporated into the carbon dioxide that plants consume during photosynthesis. When animals consume these plants, they also incorporate C-14 into their bodies. As C-14 is radioactive, it undergoes radioactive decay over time. By measuring the amount of C-14 remaining in a sample, scientists can determine the age of organic materials, such as fossils or artifacts, through a process called radio carbon dating.

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• 3.

### Liquids flow from a higher level to a lower level.But,which liquid can climb walls of the container in which it is kept?

• A.

Liquid helium(He)

• B.

Alcohol

• C.

Water(H2O)

• D.

Liquid Nitrogen(N2)

A. Liquid helium(He)
Explanation
Liquid helium (He) can climb walls of the container in which it is kept because it is a superfluid. Superfluidity is a state of matter where the liquid can flow with zero viscosity, allowing it to climb walls and escape containers due to capillary action. This unique property of liquid helium is a result of its extremely low temperature, close to absolute zero.

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• 4.

### This is caused by blockage of blood vessel by a blood clot..

• A.

Arteriosclerosis

• B.

Thrombosis

• C.

Heart Failure

• D.

Embolism

B. Thrombosis
Explanation
Thrombosis is the correct answer because it refers to the blockage of a blood vessel by a blood clot. This condition occurs when a clot forms in a blood vessel, obstructing the normal flow of blood. It can happen in any part of the body and can lead to serious complications if not treated promptly. Arteriosclerosis is the hardening and narrowing of the arteries, which can contribute to the development of thrombosis. Heart failure is a condition where the heart is unable to pump blood effectively, and embolism refers to the blockage of a blood vessel by a foreign substance, such as a blood clot that has traveled from another part of the body.

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• 5.

• A.

• B.

Copper

• C.

Mercury

• D.

Iron