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 Smithsonian: Building Up, Breaking Down
further fracturing. Some chemical weathering is a consequence of acids produced by living things growing on the rock. The deterioration of structures such as bridges and statues has increased dramatically in the last few decades, how- ever, because of chemical changes that produce acid rain. Polluti...
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further fracturing. Some chemical weathering is a consequence of acids produced by living things growing on the rock. The deterioration of structures such as bridges and statues has increased dramatically in the last few decades, how- ever, because of chemical changes that produce acid rain. Pollution from automobiles and industrial plants adds sulfur dioxide, carbon dioxide, and other gasses to the natural carbon dioxide in the air. 4 Sand is used in glass, concrete, asphalt, bricks, and the mortar that holds
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http://www.smithsonianeducation.org/educators/lesson_plans/building.pdf#page=4
www.smithsonianeducation.org/educators/lesson_plans/building.pdf#page=4
further fracturing. Some chemical weathering is a consequence of acids produced by living things growing on the rock. The deterioration of structures such as bridges and statues has increased dramatically in the last few decades, how- ever, because of chemical changes that produce acid rain. Pollution from automobiles and industrial plants adds sulfur dioxide, carbon dioxide, and other gasses to the natural carbon dioxide in the air. 4 <span class="highlight">Sand</span> is used in glass, concrete, asphalt, bricks, and the mortar that holds
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