Why is it important for a scientist to think about their sample size if they are going to extrapolate their data? (Hint: Think about predicting the rainfall this coming March based on only last year, as compared to predicting it based on the past 30 years.) How might a scientist determine if they have enough samples?

the answer to your question is b

which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.

i think the answer is composed of atoms