Force and Motion
Engines do what for man?
Make work easier
What causes electrically charged object either to attract or repel each other?
electric force
All work involves what?
energy
When water heats up, the molecules do what?
Move faster
In a steam engine is heated up in what?
A boiler
Forces are important in our world because we need them to...
produce motion
Electric charges are either ___________ or ___________.
positive or negative
A type of energy that we feel
heat
When water freezes the molecules form what?
Hexagon shapes
In a steam engine what is cooled in what?
A condenser
A force is described as what?
A push or pull
Men dug up this kind of rock from the ground to form a compass.
What is lodestones
energy in motion
kinetic
Three states of matter are
solid, liquid, and gas
Steam is pushed into ________ to cause the piston to move?
A cylinder
The force of attraction that exist between any pair of objects is what?
Gravity
Like charges ___________ and opposite charges___________
repel and attract
stored energy
potential
was as a gas is called
steam
Because its molecules are farther apart, steam takes up much more space than what?
Liquid
Matter
The north pole and south seeking pole are how we describe what?
Magnetic forces
Moving energy from one object to another
Transfer of energy
As water turns to ice it becomes
more dense
What causes the teakettle to whistle?
The expanding steam inside of the container needing a place to go.