2. What do you have to use in order to accomplish work with half the effort?
(a) Ten percent of the distance multiplied by one-third of the effort.
(b) Half the distance.
(c) One-third the distance.
(d) Twice the distance.

3. What is the result of a collision of molecules which break on impact forming new and different molecules?
(a) Combustion.
(b) Fusion.
(c) Radiation.
(d) Fission.

4. What causes increased heat in the process of conduction?
(a) Fission.
(b) Fusion.
(c) Electronic transfers.
(d) Increased movement.

5. What is electricity flowing through a wire?
(a) Watts.
(b) Resistance.
(c) Current.
(d) Ohms.

6. What does the inclined plane do?
(a) Decreases gravitational force.
(b) Increases effort.
(c) Extends the distance to a rise.
(d) Decreases effort.

7. What imparts movement into the air or water around them on a ship?
(a) Bits.
(b) Levers.
(c) Cams.
(d) Propellers.

8. What is the transfer of heat through infrared rays?
(a) Convection.
(b) Heat cannot transfer through infrared rays.
(c) Thermal radiation.
(d) Transmigration.

9. What happens if the edges of the two wheels touch?
(a) The one wheel will wear out faster than the other.
(b) The one will stop the other wheel.
(c) Nothing unless they have cams.
(d) The rotation of one will cause the other to rotate.

10. What is the resistance of an object to any change in its speed or direction?
(a) Lift.
(b) Gravity.
(c) Propulsion.
(d) Inertia.

11. What does increasing heat do to molecules?
(a) It slows them down.
(b) Nothing.
(c) It increases the movement of molecules.
(d) It makes them break apart.

12. What do the double walls of a thermos enclose?
(a) Oxygen.
(b) Nitrogen.
(c) Argon.
(d) A vacuum.

13. What is the term for the process of molecules moving further apart in convection?
(a) Expansion.
(b) Trajection.
(c) Inference.
(d) Acceleration.

14. What contains one element which is the detonator and another reactive element which acts as the propellant?
(a) Oscillators.
(b) Explosives.
(c) Engines.
(d) Propellants.

15. What is the principle that states energy is neither created nor destroyed?
(a) The principle of the conservation of energy.
(b) The principle of energy change.
(c) The principle of energy loss.
(d) The principle of energy gain.