Answer:
The air at higher altitudes is colder, less dense, and contains fewer oxygen molecules. This means that you need to take more breaths in order to get the same amount of oxygen as you would at lower altitudes. The higher the elevation, the more difficult breathing becomes
Explanation:
To find the answer, you will need to take 525 mL and multiply it by 20 mg/mL. The mL units cancel each other out so you will be left with an answer in mg.
525 mL x 20 mg/mL = _____
Answer:
b
Explanation:
because humans are the reason. They cut down trees and uses more machines oil and gasses by which they create a gas global warming.
The way the understanding of the solar system has changed is through the knowledge of the Hadean Era when the solar system was still in its formative stage.
<h3>What is the Solar System?</h3>
This refers to the planetary system that contains the sun and the nine planets that revolve around each other.
Hence, we can see that the Hadean Era happened about 4.6 billion years ago when the clouds of dust and gas formed a solar nebula which brought about asteroids, moons, planets, etc.
Read more about the solar system here:
brainly.com/question/1286910
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