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Fittoniya [83]
3 years ago
5

The distribution of blood to various tissue areas is controlled mainly by the constriction and dilation of

Biology
1 answer:
olya-2409 [2.1K]3 years ago
6 0
<span>Constriction and dilation of blood vessels controls the distribution of blood to various tissue areas</span>
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D. 6 CO 2 , 6 H 2O , and sunlight

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The reactant are the substances are going under a reaction. They are the "items" needed for a product to form. In which in this case, 6 CO 2 , 6 H 2O , and sunlight are needed to make C 6H 12O 6 + 6 O 2 .

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For the complete encyclopedic entry with media resources, visit: http://www.nationalgeographic.org/encyclopedia/weathering/

Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.

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Weathering and erosion constantly change the rocky landscape of Earth. Weathering wears away exposed surfaces over time. The length of exposure often contributes to how vulnerable a rock is to weathering. Rocks, such as lavas, that are quickly buried beneath other rocks are less vulnerable to weathering and erosion than rocks that are exposed to agents such as wind and water.

For example, certain kinds of air pollution increase the rate of weathering. Burning coal, natural gas, and petroleum releases chemicals such as nitrogen oxide and sulfur dioxide into the atmosphere. When these chemicals combine with sunlight and moisture, they change into acids. They then fall back to Earth as acid rain.

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