A. deforestation
B. water pollution
C. acid rain
D. forest fire
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A. Always upright
B. May be upright or invented
C. Always inverted
D. Always Circle
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A. Cirrostratus
B. Stratocumulus
C. Altocumulus
D. Cirrus
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A. asbestosis
B. asthma
C. allergy
D. sinusitis
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A. The scattering of sunlight by air molecules
B. The presence of water vapor
C. Absorption of blue light by the air
D. Emission of blue light by the atmosphere
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A. Conduction of heat upward from a hot surface
B. Convection from a hot surface
C. Absorption of infrared energy that has been radiated from the surface
D. Heat energy from the earth’s interior
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A. Selection
B. Introduction
C. Acclimatization
D. Quarantine
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A. Accumulation of salts in water
B. Accumulation of salts in soil
C. Accumulation of salts in body
D. Accumulation of salts in animals
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A. the greenhouse effect to lessen
B. lakes and forests to die
C. acid indigestion in humans
D. all the above are correct
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A. A gas
B. A cloud droplet
C. A rain drop
D. A snowflake
Submitted by: Mansoor Ul Haque
