- (A) Aphelion
- (B) Perihelion
- (C) Apoapsis
- (D) Periapsis
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- (A) January – July
- (B) June – December
- (C) July – January
- (D) December – June
- (A) Always upright
- (B) May be upright or invented
- (C) Always inverted
- (D) Always Circle
- (A) Cirrostratus
- (B) Stratocumulus
- (C) Altocumulus
- (D) Cirrus
- (A) asbestosis
- (B) asthma
- (C) allergy
- (D) sinusitis
- (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
- (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
- (A) Selection
- (B) Introduction
- (C) Acclimatization
- (D) Quarantine
- (A) Accumulation of salts in water
- (B) Accumulation of salts in soil
- (C) Accumulation of salts in body
- (D) Accumulation of salts in animals
- (A) the greenhouse effect to lessen
- (B) lakes and forests to die
- (C) acid indigestion in humans
- (D) all the above are correct
