Rockets Science Vocabulary & Crossword Puzzle

3. For every force acting on one object, there is an equal but opposite force acting on a different object (also called action and reaction forces).
6. The action of pulling something forcefully or with difficulty.
7. A vehicle or missile that produces thrust in one direction by ejecting high-speed gases in the opposite direction. Rockets carry all of their own propellant.
11. Force = mass x acceleration (also stated as acceleration = force divided by mass). An object accelerates more quickly if there is a greater force pushing it. Also, it is harder to accelerate an object if it has more mass (kilograms).
13. Water or air contains strong currents which change direction suddenly.
15. An American engineer, professor, physicist, and inventor who is credited with creating and building the world's first liquid-fueled rocket.
16. Means takeoff, especially the vertical takeoff of a rocket or helicopter.
17. The reaction force that pushes a rocket in one direction as propellant is pushed in the opposite direction.

1. The material that is used to create a pressurised gas that creates thrust when released. For a chemical rocket, the propellant is the fuel and oxidiser.
2. Uninterrupted flow in a fluid near a solid boundary in which the direction of flow at every point remains constant.
4. An object will remain at rest or keep moving at a constant speed in a straight line unless there is an unbalanced force.
5. A small rocket engine on a spacecraft, used to make alterations in its flight path or altitude.
8. The average location of the weight of an object.
9. A German aerospace engineer and space architect and champions of space exploration in the twentieth century.
10. Is the point where the total sum of a pressure field acts on a body, causing a force to act through that point.
12. Is the rate of motion in a specific direction.
14. A measure of the maximum momentum that a given reaction engine and fuel supply can impart to a vehicle.