Force and Motion
Electromagnetic Forces
Gravity & Inertia
Machines and Structure Concepts
Other
100
What kind of force allows work to be done?
Unbalanced Forces
100
Opposite poles of a magnet do what?
Attract
100
Does the moon have more or less gravity than the Earth? Why?
Less gravity, because it has less mass.
100
What type of machine is this?
A Pulley
100
Name an example of a lubricant.
Oil, grease, or wax
200
Two objects bumping into each other is called what?
Collision
200
What has a magnetic field because of its polarity?
A magnet
200
What is the part of an object where the pull of gravity is the strongest?
Center of Gravity
200
What type of structure is this?
A dome
200
True or False: Friction decreases with a rough surface.
False, friction increases with a rough surface.
300
Who discovered the Laws of Motion?
Sir Isaac Newton
300
True or False: An electromagnet can generate gravity.
False - it can generate electromagnetic force.
300
What is the most stable shape and has a low center of gravity?
A pyramid
300
What is the base of a building called?
Foundation
300
Mass, speed, and direction are all parts of an objects what?
Moving Energy
400
An object in motion will _________ unless acted upon by an unbalanced force.
Stay in motion
400
What acts as a giant electromagnet?
The Earth
400
True or False: A bear has greater mass and inertia than a cat.
True
400
What part of a lever holds and balances weight?
The Fulcrum
400
True or False: A screw is a type of inclined plane.
True
500
What is the movement resulting from force?
Work
500
True or False: Same poles in a magnet attract.
False
500
What is the property of matter that makes is resist a change in motion?
Inertia
500
What type of machine was designed to overcome weight and make lifting easier?
A Pulley
500
Sound and heat are examples of what kind of energy in a collision?
Converted