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The atmospheric greenhouse effect is produced mainly by the __________________?
A. Absorption and re-emission of visible light by the atmosphere
B. Absorption and re-emission of ultraviolet radiation by the atmosphere
C. Absorption and re-emission of infrared radiation by the atmosphere
D. Absorption and re-emission of visible light by clouds
E. Absorption and re-emission of visible light by the ground
At what time of day is the relative humidity normally at a minimum ________________ ?
A. When the air temperature is highest
B. Just before sunrise
C. About midnight
D. When the air temperature is lowest
Water vapor is ______________?
A. A gas
B. A cloud droplet
C. A raindrop
D. A snowflake
Acid deposition causes ______________________?
A. the greenhouse effect to lessen
B. lakes and forests to die
C. acid indigestion in humans
D. all the above are correct
Salinization is ___________?
A. Accumulation of salts in water
B. Accumulation of salts in soil
C. Accumulation of salts in body
D. Accumulation of salts in animals
The gradual physiological adjustment to slowly changing new environmental conditions is known as _____________________?
Approximate age of the moon is _________?
A. 4.51 billion years
B. 4.55 billion years
C. 4.53 billion years
D. 4.57 billion years
A. 4.14 billion years
B. 4.64 billion years
C. 4.54 billion years
D. 4.34 billion years
Approximate age of the milky-way is ________?
A. 16.5 billion years
B. 15.5 billion years
C. 13.5 billion years
D. 14.5 billion years
Nearest galaxy to our milky way is ________?
A. Messier 81
One Astronomical unit is equal to how much Km in whole numbers?
A. 160 million km
B. 140 million km
C. 150 million km
D. 130 million km
The hard, solid rocks, whose composition or texture has been changed by heat or pressure in the Earth, are called____________?
A. Sedimentary rocks
B. Metamorphic rocks
C. Igneous rocks
D. All of the above
The atmospheric greenhouse effect is produced mainly by the?, One Astronomical unit is equal to how much Km in whole numbers?, Nearest galaxy to our milky way is, Approximate age of the milky-way is, Approximate age of the moon is