Vocabulary
What do you call a change in position?
Motion
________ is how fast an object is moving.
Speed
To calculate speed, divide the distance traveled by _________.
time
Light travels in a ___________ line until it strikes an object.
straight
When an object _________ it produces sound.
vibrates
The rate of change in an object's position increases.
Acceleration
When a force such as a push is applied to an object in the direction that the object moves, its speed __________.
accelerates or increases
60 Miles traveled in 2 hours
Determine the speed
30 miles per hour
A prism ______ light into a rainbow of colors.
bends
Sound waves travel through ________ such as air or water.
mediums
A push or pull of an object
Force
When a force is applied in the opposite direction that the object is moving, the object ____________.
90 Miles in 2 hours
Determine the speed
45 miles per hour
A red apple appears red because the red light that strikes the apple is _______. Other colors of light are absorbed.
reflected
________ is the highness or lowness of a sound.
Pitch
When two forces act on an object with equal strength.
Balanced Force
_________ is when one force acting on an object is stronger than another force and it causes an object to move.
Unbalanced force
150 miles in 3 hours
Determine the speed
50 miles per hour
A material that allows NO light through is called _____.
opaque
Objects that vibrate slowly produce _____ pitched sounds such as a tuba.
low
Law of Inertia
_________ is a force that pulls all objects toward Earth.
Gravity
1990 miles traveled in 5 hours
Determine the speed
398 miles per hour
A lens that is curved outward and makes object look bigger is called a _________ lens. It is used in a microscope, telescope, and binoculars.
convex
What do you call sound that bounces off of a hard surface?
An echo