Manipulated variable: the types of soil
Responding variable: how much t the plants grow
Run off
Explanation:
Run-off are the water sources that becomes polluted as they travel over the earth surface.
Surface run-off are water that moves on the earth surface. This water is a component of the water cycle which usually originate from precipitation.
- As the water moves through different terrain it comes into contact with different pollutants.
- Some of these run-off travels through mines, waste disposal sites among others.
- This leads to the contamination of this form of water as it moves through these earth materials.
- They are the most polluted water
Learn more:
Ocean water brainly.com/question/6760255
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Answer:
The equation for percent composition is (mass of element/molecular mass) x 100.
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Answer:
CH4 + 2 O2 - - - > CO2 + 2 H2O
Explanation:
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you can check by adding all the numbers on both sides
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Answer:
valency of an element is a combining power of an element.
for example oxygen has six valance electron but its valency is 2.
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