Light and Sound
Magnets and Electricity
Motion
Force, Matter and Motion
Shaping the Earth
100
What is sound that reflects off the surface of another material.
an echo
100
What is the fourth form of matter
plasma
100
what is the top of a wave called
crest
100
What is the amount of matter in an object called
mass
100
What is the process of washing rock and dirt away from the Earth's surface called
erosion
200
Who is the inventor of the light bulb
Thomas Edison
200
What is another name for the northern lights
aurora borealis
200
What is a push or pull called
force
200
What is the simple machine that developed into the drill bit
the screw
200
What is an opening in the Earth's crust that allows liquid rock to come to the surface called
a volcano
300
What is something that allows light to pass through called
transparent
300
What are eyeglasses called wit two types of lenses, one for distance and one for reading
bifocals
300
What is the force that slows down or stops an object called
friction
300
Who is the scientist that discovered the three laws of motion
Sir Isaac Newton
300
What is liquid rock called before it reaches the surface
magma
400
What type of matter does sound travel faster through
solid
400
to push away means what
repel
400
What is the force that pulls objects toward the earth called
gravity
400
What is just one of the six simple machines
lever, inclined plane, screw, wedge, pulley, or wheel and axle
400
What is someone who has knowledge of the Earth called
a geologist
500
to bend light is to
refract
500
the area where the force of a magnet is felt is a magnetic___________
field
500
That is the speed of motion called
velocity
500
What animal can produce enough push or pull to set a whole heap of wood chips or dead trees into motion
A woodchuck
500
What is the layer of Earth called that contains mostly water
hydrosphere
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