I believe true because the Precambrian is the first geologic time, going back 4600-570 years ago, meaning it should contain the earliest of things.
I think it’s B
Hope that’s right
The answer is B) <span>Nuclear power has far less environmental impact than using coal or natural gas to produce electricity.</span>
14. compound
15. the concentration cannot be increased.
16. heterogenous mixtures
17. chocolate chip cookies
18. vegetable soup
19. a mixture is a pure substance a compound is not
20. Tastes sour
