Matter
to mix completely with a liquid
dissolve
the movement of energy from one object to another
energy transfer
an imaginary line through Earth from the North Pole to the South Pole
axis
a device that produces an electric current due to changes to the materials inside it
Battery
the process through which layers of sediment are squeezed together by the weight of sediment above, removing water or air from spaces between particles of sediment
compaction
measure of how much space an object take up
volume
a force between surfaces that slows objects or stops them from moving
friction
the repeating pattern of day and night that occurs every 24 hours
day/night cycle
the flow of electricity through a conductor
electric current
a rock that forms when small bits of materials are pressed together in layers
sedimentary rock
a state of matter that has a definite volume but no definite shape
liquid
a noncontact force that pulls objects toward the center of Earth
gravity
the star closest to Earth
Sun
a form of energy that makes it possible for the eye to see
Light energy
the condition of the sky and air at a given place and time
weather
the amount of material in an object
mass
forces that act together on an object without changing its motion
equal forces
a dark shape that is made when a source of light is blocked
Shadow
the bouncing of light off of a surface
reflection
a source of energy made from the remains of ancient, once-living things
fossil fuel
to cover or surround with a material that reduces or stop the flow of energy
insulate
to have contact with something through touch or actions
interaction
when an object in space seems to move even though it is Earth that is moving
apparent motion
the bending of light as it passes from one transparent material into another
refraction
the process through which a gas changes into a liquid
condensation