Acceleration- Increase in speed over time.

Deceleration- Decrease in speed over time

Escape Velocity- The amount of speed needed to break away from the gravity of a planet or moon.

Fins- The wings on the side of the rocket to help with flight direction and speed.

Force- A push or pull.

Friction- A force that lows down or causes an object to stop moving.

Gravity- The force of attraction between two items.

Inertia- The tendency for an object to stay at rest or in motion.

Launch Vehicle- The rocket that helps put the payload/orbiter into space.

Law of Motion (1^st)- Objects will continue at rest or in motion. Unless there is another force that acts on it.

Law of Motion (2^nd)- The more massive an object the harder it is to move it, or stop it.

Law of Motion (3^rd)- For every action there is a reaction.

Mass- The amount of matter in an object.

Matter- Anything that has weight and takes up space (gas, liquid, solid, plasma)

Motion- Movement of an object.

Nose Cone- The top/front of the rocket, which usually holds the payload.

Payload- The object that is to travel into space. It could be a satellite, human, animal, etc.

Pressure- Force acting on an area of a surface.

Propellant- An item used to push rocket engines forward (fuel).

Thrust- To push with a force.

Thrusters- The opening(s) at the bottom of a rocket to let the gas escape from the propellant tank.

Velocity- Speed in a specific direction.