force
A force is a push or
pull upon an object
resulting from the
object's interaction
with another object.
pull
A pull is a force that
acts in the direction of
the origin of the force.
motion
Motion (physics), any physical
movement or change in
position or place.
gravity
Gravity is the force that
causes two particles to pull
towards each other.
position
The point or area occupied by a physical object
speed
Speed is the rate of motion, or
equivalently the rate of change
in position, often expressed as
distance traveled per unit of
time.
direction
The line or course on which
something is moving or is
aimed to move or along which
something is pointing or facing.
mass
lever
A lever is a simple machine
that makes work easier for
use; it involves moving a load
around a pivot using a force.
simple machines
A simple device, such as a
lever, pulley, or inclined
plane; a machine without
moving parts.
inclined
plane
pulley
wedge
screw
Wheel
and axle
Light
A range of electromagnetic radiation that
can be detected by the human eye
transparent
Allowing light to pass through
translucent
Allowing only some light to pass through
opaque
Not allowing light to pass through
Reflection
The bouncing of light off an object
Refraction
The bending of light as it moves from
one material to another
Convex lens
A lens that is thicker at the center than
it is at the edges
Concave lens
A lens that is thicker at the edges than it
is at the center
prism
A triangular piece of cut glass used to break
white light up into its constituent colors.
ROY G. BIV
The color seen in a rainbow: red, orange,
yellow, green, blue, indigo, and violet.
spectrum
The different colors of light that are
coming from a star
Color
The byproduct of the spectrum of light as
it is reflected or absorbed
rainbow
An arc of colored light in the sky caused
by refraction of the sun’s rays by rain
vibration
A quick back-and-forth motion;
a trembling motion
Sound wave
Waves formed by compression of the material (as
air) through which they travel regardless of whether
they can be heard.
pitch
How high or low a sound is
Loud
Marked by intensity or volume of sound
Soft
Not loud, harsh or irritating