. Yazmin is watching her teacher do an experiment. As she is observing, what should she be looking for to identify the experiment as a chemical reaction?

A. A gas being produced

B. Color change

C. Temperature change

D. Any of the above

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline.which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

Which identifies the main purpose of biological taxonomy?

Which of the following human activities resulted in the growth of the north american deer population?