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Daniel [21]
3 years ago
5

(14 points) What nationwide step that greatly reduced dangerous automobile emissions was mandated by the U.S. Clean Air Act?

Biology
2 answers:
kirill [66]3 years ago
8 0

Using electricity instead of fossil fuels

vampirchik [111]3 years ago
3 0

Answer: a

Explanation:

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Answer:

c. Magma composition and cooling rate.

Explanation:

A rock cycle can be defined as a concept used to describe the continuous process that leads to a rock's creation, formation, transformation from one form to another, destruction and reformation over a specific period of time. The natural phenomenons that influences the rock cycle are weathering, plate tectonic activity, erosion, etc.

Basically, the three (3) main types of rocks are; metamorphic rock, sedimentary rock and igneous rock.

All igneous rocks are produced from magma (lava) and formed at the Earth’s surface, thereby, causing them to have a coarse texture and dark colors.

Generally, the cooling and solidification of magma (lava) leads to the formation of an igneous rock, either when the melted rock is still inside the continental crust of the Earth or at volcanoes on the Earth's surface.

Hence, magma composition and cooling rate determines the type of igneous rock that forms from magma. Some examples of an igneous rock are granite, obsidian, tuff, basalt, rhyolite, andesite, pegmatite, dacite, scoria, pumice, etc.

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2 years ago
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I think Earth’s atmosphere plus atmosphere. So, 23+48=71. So, the answer is A
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2 years ago
I need the answer of this please .
Sonbull [250]

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picture one

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Which type of mutation occurs only in reproductive cells
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Explanation:

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Please help thank you
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