Which of the following is true about density? it changes constantly
it cannot be used to identify a substance
it stays the same no matter how much of the substance that you have
it changes depending on how much of the substance that you have

i believe the answer is c

answer: c

explanation:

explanation:

the sun shines white and black light to our planet. the white light has all the colors in it. in our upper atmosphere, we have dust particles and oxygen molecules. the white light meaning all of the colors in a rainbow shines through the upper levels of the atmopshere and the blue light scatters across the entire planet. that is why our sky is blue.

answergaba;