1 Scientists believe that Earth’s early atmosphere changed in composition as a result of

(1) the appearance of oxygen-producing organisms
(2) the drifting of the continents
(3) the changes in Earth’s magnetic field
(4) a transfer of gases from the Sun

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2 Which atmospheric conditions would cause smoke from a campfire on a beach to blow toward the ocean?

(1) warm air over the land and cool air over the ocean
(2) humid air over the land and dry air over the ocean
(3) low-density air over the land and high density air over the ocean
(4) high air pressure over the land and low air pressure over the
ocean

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3 Which characteristics of a building material would provide the most energy-absorbing exterior covering for a house?

(1) dark colored and smooth textured
(2) dark colored and rough textured
(3) light colored and smooth textured
(4) light colored and rough textured

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4 When the time of day for a certain ship at sea is 12 noon, the time of day at the Prime Meridian (0° longitude) is 5 p.m. What is the ship’s longitude?

(1) 45° W     (3) 75° W
(2) 45° E      (4) 75° E

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5 The occurrence of parallel scratches on bedrock in a U-shaped valley indicates that the area has most likely been eroded by

(1) a glacier (3) waves
(2) a stream (4) wind

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