What percentage of earth’s water supply is fresh water___________?
What percentage of earth’s water supply is fresh water___________?
A. 3%
B. 5%
C. 21%
D. None of these
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Each day human body breathe in __________ liters of air.
Each day human body breathe in __________ liters of air.A. 5,000 to 10,000
B. 10,000 to 15,000
C. 15,000 to 20,000
D. 20,000 to 25,000
The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day.
The air that is inhaled is about 20-percent oxygen, and the air that is exhaled is about 15-percent oxygen, so about 5-percent of the volume of air is consumed in each breath and converted to carbon dioxide. Therefore, a human being uses about 550 liters of pure oxygen (19 cubic feet) per day.Water is a highly effective coolant for a car engine because _________?
Water is a highly effective coolant for a car engine because _________?
A. Water is good conductor of heat
B. Water has very high specific heat capacity
C. Water boils at a comparatively high temperature
D. Evaporation of water produces lot of coolingWhen our sun reaches the end of its red giant phase, it will turn into a___________?
When our sun reaches the end of its red giant phase, it will turn into a___________?
A. Supernova
B. White Dwarf
C. Black Hole
D. Neutron StarCelestial body that affects tides of Ocean is?
Celestial body that affects tides of Ocean is?A. Sun
B. Moon
C. Galaxy
D. MeteoritesA clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as________?
A clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as________?A. Glaucoma
B. Hemophilia
C. Cataract
D. DiphtheriaFrog Heart has how many chambers?
Frog Heart has how many chambers?A. 2
B. 3
C. 4
D. 5