Q. What is the boiling point of water at sea level in degrees Celsius?
-
A.
90
-
B.
100
-
C.
110
-
D.
120
Solution
The boiling point of water at sea level is 100 degrees Celsius.
Correct Answer:
B
— 100
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Q. What is the main gas found in the air we breathe?
-
A.
Oxygen
-
B.
Carbon Dioxide
-
C.
Nitrogen
-
D.
Argon
Solution
Nitrogen is the main gas found in the air we breathe, making up about 78% of the atmosphere.
Correct Answer:
C
— Nitrogen
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Q. What is the powerhouse of the cell?
-
A.
Nucleus
-
B.
Ribosome
-
C.
Mitochondria
-
D.
Endoplasmic Reticulum
Solution
Mitochondria are known as the powerhouse of the cell because they produce energy in the form of ATP.
Correct Answer:
C
— Mitochondria
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Q. What planet is known as the Red Planet?
-
A.
Earth
-
B.
Mars
-
C.
Jupiter
-
D.
Venus
Solution
Mars is known as the Red Planet due to its reddish appearance, which is caused by iron oxide on its surface.
Correct Answer:
B
— Mars
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Q. Which gas do plants absorb from the atmosphere during photosynthesis?
-
A.
Oxygen
-
B.
Carbon Dioxide
-
C.
Nitrogen
-
D.
Hydrogen
Solution
Plants absorb carbon dioxide from the atmosphere during the process of photosynthesis.
Correct Answer:
B
— Carbon Dioxide
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