Explain the difference (in respect to the central nervous system) between a stimulant and a depressant. What are some of the differences you would see between overdoses with each?

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements

you know they are heterozygous for a trait because they have it as jj or jj.