The testable question in a science investigation reads: “how does the size of a motor affect the speed of the vehicle? ” what is the independent variable in the question?
a) the sizes of motors
b) the brands of motors
c) the varying speeds
d) the types of vehicles

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

What are the similarities of physical and chemical change ?