Matter
the amount of matter in a given space
density
when one or more substances are changed into a new substance
chemical change
All __________have wavelength, frequency, amplitude and speed.
waves
_______________equals mass times acceleration
force
Magnetic force is strongest at a magnet's ____.
poles
a unique type of gas made of particles that have an electric charge
plasma
a characteristic that helps identify a substance
property
The height of a wave's crest
amplitude
the tendency of an object at rest to stay at rest; object in motion to continue moving at
inertia
The strength of two magnets' attraction or repulsion depends on
how far apart they are
matter that has a set number of parts and set properties
pure substance
a change in one or more physical properties of substance
physical change
The distance between corresponding parts of a wave is its
wavelength
called the law of inertia
Newton's First Law
a tool that uses a magnet to determine direction
compass
the amount of space something takes up
volume
the smallest unit of a substance that has all of the properties of that substance
molecule
____________ light causes sunburns
ultraviolet
Electricity is a form of ____that is all around us.
energy
A current-carrying coil of wire with many loops wrapped around a magnetic rod is called a/an_
electromagnet
Protons have a ____________ charge.
proton
matter made up of only one kind of atom
element
Humans see different wavelengths of light as different
color
According to Newton's 3rd Law for every action force
there is an equal and opposite reaction force
How can you magnetize a piece of iron?
by rubbing it with a magnet
by holding it close to a very strong magnet