What evidence of their passage do glaciers leave on bedrock? What will be an ideal response?
Bedrock is eroded by abrasion, since the glaciers carry sediments at their base (this is like sandpaper
rubbing against the bedrock). Abrasion causes glacial polish, a smooth surface that glistens in reflected
light. Abrasion also leaves glacial striations, nearly straight scratches in the rock that point in the
direction the glacier went. Abrasion pulverizes rock and leaves behind rock flour
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The movement of water up the xylem of a plant
A. occurs due to active transport. B. requires cohesion but not adhesion. C. occurs as a result of the movement of sugars in the phloem. D. requires no energy input from the plant.
Earthquakes may occur along
A) transform boundaries. B) convergent boundaries. C) divergent boundaries. D) plate boundaries.
Why did the United States refuse to ratify the Kyoto Protocol under both the Clinton and Bush administrations?
Undamaged coral reefs can grow and keep pace with a natural rise in sea level.
Answer the following statement true (T) or false (F)