which is the of these their statements correctly describes a key difference between aerobic activity and anaerobic activity

Answers

Answer 1

Answer: aerobic uses oxygen to liberate heat while anaerobic is in the absence of oxygen.

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Polaris, the North Star, is almost always visible in the same location because A) it is the brightest star in the sky. B) it is gravitationally attracted to our sun. C) it is the closest star to the earth, besides our sun. Eliminate D) the axis of the earth passes directly through the North Star.

Answers

The north end of the Earth's axis points almost exactly toward Polaris.
The only time when Polaris is not visible at the same place in the sky
at night is when that part of the sky is cloudy.

Answer D, The axis of the earth passes directly through the north star.

Explanation: I did it on usatestprep

What causes rocks to change composition when reacting with oxygen?
Please help!!

Answers

Acid reactions and oxidation

Light____.-requires a medium to travel
- is refracted when it bounces off a shiny surface
-is created by vibrations in electric and magnetic fields
-moves in longitudinal waves

Answers

Light is created by vibrations in electric and magnetic fields because the light is an electromagnetic wave, therefore the correct answer is option C

What is an electromagnetic wave?

The oscillation of an electric field and a magnetic field produces electromagnetic waves, which are waves. In other words, electromagnetic waves (EM waves) are made up of vibrating magnetic and electric fields that are orthogonal to one another.

It is undeniable that we experience solar radiation, which is an electromagnetic wave that originates from the sun and can travel through space to the planet.

Light is a form of electromagnetic which is made up of the electric and magnetic filed that are orthogonal to each other, light can travel without any medium.

Thus, Light is created by vibrations in electric and magnetic fields, because the light is an electromagnetic wave, therefore the correct answer is option C

Learn more about Electromagnetic waves from here

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Answer:

Explanation:

light does not need a medium

it is refracted

Light is made up of little packets of energy called photons.

electromagnetic waves

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