Answer:
Oil, natural gas, and coal are considered nonrenewable resources because their formation processes take thousands of years, whereas water can be reused after processing and the wind never stops blowing. This is why the latter two are also much more sustainable ways of generating renewable energy.
Answer:
19, 28
You see, every time you add 9, according to the pattern of this equation.
10 + 9 = 19.
19 could be the next term.
Add 9 to 19.
19 + 9 = 28.
28 could be the following term.
Relative dating is used to identify what things existed before or after another. This is usually seen in fossils in which layers of new fossils are laid on top of each other.
Absolute dating uses scientific techniques to identify the actual date of when a fossil or animal existed
Filling in the gaps of absolute dating with that of relative dating, these methods made the geologic time scale.