Acceleration: The rate of change at which the velocity of an object increases per unit of time.
Atoms: The elementary particles in the universe that make up all matter. They consist of
protons (+) and neutrons (neutral) charges in its nucleus, and orbiting electrons(-)
Batteries: Two or more cells in series. Primary batteries are those which can only used once,
where as secondary cells are those which can be used again by recharging the battery.
Cell: A source or power and voltage to a electron(s).
Gravity: The force exerted by the Earth to hold us down.
Kinetic Energy: The energy an object has due to its motion. Such an example is the energy a
car possesses when it is moving.
Potential Energy: The energy as a result of gravity or a form of acceleration
Velocity: The distance travelled by an object in a specified time.