Astudent is conducting an experiment to determine how far a ball will roll down a ramp based on the angle of incline. what are three possible controls for this experiment?

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Where are the strongest jet streams located?

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.