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kykrilka [37]
3 years ago
12

Ella is interested in combining substances to form a new material. What does she need to know before she combines the substances

to create a specific material?
Geography
1 answer:
Ganezh [65]3 years ago
8 0

Answer: Things to note are the physical and chemical reaction of the substances.

Explanation:

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Answer:

B. local water contamination

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Explanation:

The mining, be it a surface one or underground one, has several negative impacts on the surrounding area. Two common negative impacts of both types of mining are contamination of the local waters, as well as the destruction of ecosystems.

The waters get heavily polluted with toxic chemicals pretty much always ad everywhere where there is mining. The main reason for this is that the nus-products from the mining are released into the waters. This causes high level pollution of the waters, thus making it not good for anything, and the aquatic life in the waters dies out rapidly.

The fact that the waters are heavily polluted means that everything that comes in touch with them becomes heavily polluted as well. Also, apart from releasing chemicals in the waters, the mining requires space, so the area is cleared out, and after that lot of toxic material is disposed on it. The majority of the plants can sustain that, so they die out, and since they are the basis of the ecosystems, the animals die out as well.

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Paleontologists study the remains of organisms that lived in the past. Many of these remains are preserved in rocks.
Mariana [72]
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Hope this helps :)
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How did Islam initially spread to North Africa?
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They went down the yarmuk river an took over
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