Abeka 4th Grade Science Test 3
crest
Highest point of a wave
Be able to tell the colors of the spectrum
ROY G BIV
wavelength
The distance between two crests of a wave
what has less mass than the elephant?
a horse
molecules
all matter is made of this
unbalanced forces
allow work to be done
what type of pyramid is the most stable?
an upright pyramid
Opposite poles of a magnet
attract each other
foundation
base of a building
potential energy
coal and other fuel sources are an example of this
converted energy
energy that has changed from one kind to another
A __________________________ happens when energy is moved from one place to another?
energy transfer
Light and Sound
examples of kinetic energy
frame
gives a building its shape
luminous
giving off light
magnet
has polarity because of its magnetic field
friction___________________ with a rough surface
increases
The property of matter that resists changes in motion is called?
inertia
opaque
not letting light through
machine
A device that makes work easier
current electricity
A flow of electric charge along a path.
conductor
A material that allows heat and electricity to pass through it.
insulator
A material that does not conduct heat or electricity well
kinetic energy
energy of motion
atoms
particles that make up molecules
balanced force
prevents work from being done
Like poles of a magnet _______________?
repel
translucent
scatters light
an object at rest will __________________ unless acted upon by an unbalanced force
stay at rest
potential
stored or waiting energy
Energy
the ability to do work
Sound is a type of energy that is released when something ___________________.
vibrates
a machine that helps overcome friction is _____________________________?
wheel and axle
transparent
Allowing light to pass through
mass
the amount of matter in an object
reflection
the bouncing back of a ray of light
pitch
the highness or lowness of a sound
volume
the loudness or softness of a sound
