Questions 1
What happens when opposite poles or charges are brought together?
They attract
What happens when like poles or charges are brought together?
They repel
What are the three states of matter?
Solid, liquid, gas
A push or pull on an object; necessary for motion
Force
Anything that has weight and takes up space
Matter
What is the temperature at which a solid changes into a liquid?
The melting point
What is the temperature at which a liquid changes into a solid?
The freezing point
What is the melting and freezing point of water?
32 degrees Fahrenheit
The force of attraction that exists between any pair of objects
Gravity
The result of a force moving an object
Work
What is the temperature at which a liquid changes into a gas?
Boiling point
What is the temperature at which a gas changes into a liquid?
The condensation point
What is the boiling point and condensation point of water?
212 degrees Fahrenheit
A force that resists motion
Friction
Energy of motion
Kinetic energy
What type of engine carries its own supply of oxygen?
Rocket
What type of internal combustion engine produces no sparks?
Diesel
What are oxidants?
Oxygen-rich compounds
A disk that moves back and forth inside a hollow cylinder
Pistin
A device that converts gases or vapors to a liquid state
Condenser
What is produced when oxidants and chemical fuels are mixed together?
Propellant
What type of rocket uses propellants?
Solid-fuel rockets
What device was developed to harness the power of moving water?
A number indicating the antiknock quality of a gasoline
Octane number
A guided military rocket
Missile