A. Star
B. Planet
C. Asteroid
D. Meteor
0
The gas used in a refrigerator to cool water is___________?
1
The average adult has a blood volume of about __________ liters.
A. Nitrogen
B. Carbon dioxide
C. Methane
D. Tetrafluoroethane
Updated by: NoumaN
3
The most abundant element in the universe is __________.
A. 4
B. 5
C. 6
D. 7
17
The most abundant element in the Earth’s crust is __________?
A. Oxygen
B. Hydrogen
C. Carbon Dioxide
D. Silicon
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3
Each day human body breathe in __________ liters of air.
A. Oxygen
B. Hydrogen
C. Carbon Dioxide
D. Silicon
16
Deficiency of Vitamin-D results in __________?
A. 5,000 to 10,000
B. 10,000 to 15,000
C. 15,000 to 20,000
D. 20,000 to 25,000
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