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Science Ch 4

Treasures of Earth - Questions

QuestionAnswer
What is soil? loose earth containing humus and tiny pieces of weathered rock
Name two ways in which physical weathering breaks or wears down rock. Extreme temperature changes can break rock; water/wind can cause weathering; germinating seeds can put roots into small cracks, causing rocks to break; glaciers can slowly wear away soft rock.
What are the two types of weathering? Physical and chemical weathering
How does quartz get its color? impurities
What is the name for plant and animal remains that have turned to stone? petrified fossils
Name the famous geyser in Yellowstone National Park Old Faithful
How is a cave formed? Acid in rainwater dissolves some of the rock, especially limestone, underground
Why are rocks found near a river delta usually sedimentary rocks? because rivers deposit sediment at their basins and the sediment builds up layer by layer to form sedimentary rock
How does a geyser work? Water from surrounding rock fills a channel running from the surface to hot rock below. Water at the bottom of the channel becomes superheated and turns to steam, forcing some of the column of water out of the channel and erupt into the air.
You are looking at pictures of a volcan erupting. What rocks would you expect to find when the lava cooled? pumice and obsidian
You notice a beautiful granite monumeynt. How was the granite for the monument formed? magma slowly cooled underground
Why are the textures and weights different in a piece of limestone and marble although you know that the marble was at one time limestone? Marble is a metamorphic rock which has been changed from limestone by pressure and heat deep in the earth's crust.
Created by: Studycards23
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