Answer:
Most stars are rather simple things. They come in a variety of sizes and temperatures, but the great majority can be characterized by just two parameters: their mass and their age. (Chemical composition also has some effect, but not enough to change the overall picture of what we will be discussing here. All stars are about three-quarters hydrogen and one-quarter helium when they are born.)
Answer:
Yes
Explanation:Like wax crayons but they can dissolve in water.
<span>Concentration of a chemical in a solution refers to how many of the chemical's molecules are sitting in a small volume of the solution. Concentration could be measured in molecules per liter, although molecules are so small compared to a liter that we usually use different units (just like we wouldn't want to measure the distance between the earth and the sun in inches). A gradient is a measurement of how much something changes as you move from one region to another. So a concentration gradient is a measurement of how the concentration of something changes from one place to another.
If this doesn't help here's a Khan Academy video </span><span>https://www.khanacademy.org/...and.../concentration-gradients</span>
True
the answer is true, but brainly requires a long answer, so here is me rambling. hope you have a great day/night, be sure to eat and drink some water :)
<em><u>ANSWERS</u></em><em><u> </u></em><em><u>:</u></em><em><u>-</u></em>
<em>1</em><em>)</em>

<em>2</em><em>)</em>

<em>3</em><em>)</em>
<em>
</em>
<em>4</em><em>)</em>
<em>
</em>
<em>5</em><em>)</em>
<em>
</em>
<em>(</em><em>mark</em><em> </em><em>me</em><em> </em><em>brainliest</em><em> </em><em>please</em><em> </em><em>I</em><em> </em><em>need</em><em> </em><em>3</em><em> </em><em>more</em><em> </em><em>:</em><em>)</em><em>)</em>
<em>
</em>