Light
speed
Motion
Simple Machines
More Simple Machines
100
the bouncing of light from a surface.
What is reflextion
100
both the speed and the direction of an object
What is velocity
100
force that pulls things toward Earth
What is gravity
100
force to move an object over a distance.
What is work
100
changes the amount of force needed, and it changes the direction of the force.
What is an inclined plane
200
This bending of light as it moves from one material to another
What is Refraction
200
any change in the speed or direction of an object’s motion.
What is Acceleration
200
a force that acts between all masses and causes them to attract one another.
What is gravitation
200
bar that pivots on a fixed point.
What is a lever
200
post with threads wrapped around it.
What is a screw
300
Materials that allow some light to pass through
What is Translucent
300
are measured in newtons (N).
What is force
300
gravitational force acting on it.
What is weight
300
The fixed point
What is fulcrum
300
two inclined planes placed back to back.
What is a wedge
400
material allows most of the light that hits it to pass through it.
What is Transparent
400
mass × velocity
What is momentum
400
about the weight of an apple, or just under a quarter of a pound.
What is one newton
400
wheel with a line around it
What is Pulley
400
change the way work is done.
What is work simple machines
500
Materials that don’t allow any light to pass through them
What is Opaque
500
the property of matter that keeps it moving in a straight line and keeps unmoving matter at rest.
What is Inertia
500
a force that resists the motion of objects, relative to each other, when the objects are touching.
What is friction
500
on wheelbarrows and on skateboards,
What is a wheel and axle
500
can make a job much easier
What is Changing the direction of the force
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