In chemistry, current refers to the rate at which electric charge flows past a point in an electric circuit. It's measured in amperes (A).
Voltage (V): A measure of electric potential energy per unit charge; essentially 'electrical pressure' that pushes electrons around a circuit.
Resistance (R): A property that describes how much an object opposes the flow of electricity; akin to rocks or obstacles in our river analogy above.
How well a substance allows electricity to flow through it; similar to how wide and unobstructed our imaginary river is.