Weather
Gravity
Simple machines
Forces and Motion
Body systems
100
What is created when a warm front when a cold front moves over it?
Warm front
100
What does Earth's gravity do?
Keeps things from floating away from Earth.
100
What type of simple machine is a doorknob?
Wheel and Axle
100
What is the force that defies motion?
Friction
100
What is the system with the red blood cells?
Circulatory system
200
What is the most commonly sighted cloud?
Cumulus cloud
200
The amount of matter in an object is known as...
Mass
200
What class lever is a wheelbarrow?
2nd class.
200
What are forces?
A push or a pull.
200
Skeletal system
Provides support for body and organs.
300
What is the cloud that thunderstorms form on?
Cumulonimbus
300
The pull that planets and other objects have on each other is called what?
Gravitational pull
300
What tool would be best to use to lift a heavy load, like a washing machine?
Lever
300
Can balanced forces move?
No
300
Respitory system
Takes in Oxygen and removes Carbon Dioxide.
400
What forms a stationary front?
Cold air pushing on warm air.
400
The rise and fall of water on earth is caused by...
Moons Gravity
400
A screw is a(n) _____________ wrapped around a central cylinder.
Lever
400
What is motion?
A change in position relative to a reference point, measured by distance and time.
400
Nervous system
Recieves and sends electrical messages throughout the body.
500
How does an occluded front form?
When two cold fronts push on a warm front.
500
The force of gravity pushes objects away from the center of the earth.
False
500
What is an example of a wedge?
Door stop
500
What is net force?
Combination of all forces acting on an object.
500
Forms a barrier between you and your surroundings.
Epithelial Tissue
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