Answer:
sound waves travel.faster through materials that are more dense
Answer:
There are millions of organic compounds but only thousands of inorganic compounds because:
a. organic compounds were formed by living things.
b. there is more carbon on Earth's surface than any other element.
c. atoms of elements other than carbon never combine with themselves.
d. carbon atoms can combine with up to four other atoms, including other carbon atoms.
The scientist observes at what rate is the concentration increasing or decreasing.
By circle fraction additional number for the number
