What essential characteristic(s) does a good experiment have? A. A control group is given the experimental treatment.

B. A single variable is tested.

C. A control is used.

D. Both b and c

About 140,000 japanese died in this japanese city when americans dropped an atomic bob at the end of world war ii

East asia is considered a less developed nation. true or false

All of the following are reasons why deserts extremely susceptible to wind erosion except a. they lack major root systems b. they contain thin, dry soil c. they have very few plants and trees d. they are extremely hot and lack water