 | Term | Definition |
| |
force |
a push or pull that acts on an object. |
| |
compound |
a pure substance made up of two or more elements that are chemically combined. |
| |
gravity |
a force that causes objects with mass to be attracted, or pulled, toward one another. |
| |
auroras |
colored lights that appear in the Northern and Southern skies. They are caused because of the magnetic lines of force that are closest together at the magnetic poles. |
| |
motion |
a cghange in an objects position. |
| |
potential energy |
is energy that is stored in an object. |
| |
speed |
a measure of the distance the object moves in a given amount of time. |
| |
transverse wave |
when particles move perpendicular to the direction of the waves. |
| |
lodestones |
mostly iron, are able to attract or repel certain metals-(magnetic rocks). |
| |
sounds |
are longitundinal mechanical waves in air or another medium. |
| |
acceleration |
a change in an objects velocity-(speed + direction). |
| |
longitundinal wave |
when particles move parellel to the direction in which the waves travel. They form compressions are rarefactions, transferring energy away from the source. |
| |
energy |
is the ability to do work. Energy and work are measured by the same unit, the joule. |
| |
sound waves |
they are produced by vibrations traveling through a medium, such as air or water. |
| |
mechancial energy |
Mechancial energy = (PE) Potential Energy + (KE) Kinetic Energy. |
| |
density |
the mass per unit volume of matter (or substance). |
| |
mechancial waves |
from when energy moves through matter, can not travel through empty space. |
| |
newton |
is a force required to accelerate a mass of 1 kg. at 1 m/s per second. |
| |
kinetic energy |
any object that is motion has kinetic energy. Kinetic energy is the energy of a moving object. |
| |
pitch |
is how low or high you percieve a sound to be. The strength of a vibration causes the sound to be loud or soft. |
| |
vibrations |
sound waves are produced by vibrations which are rapid back and forth movements of an object. |
| |
velocity |
a measure of both an objects speed and its direction. |
