Download Vocabulary # 1

Science Vocabulary Words/Definitions
Attract: To pull toward one another, as opposite poles of two magnets pull toward one another
Repel: To push away, as similar poles of two magnets push away from one another
Compass: An instrument that uses a freely moving magnetic needle to indicate direction (needle
will point to magnetic north on Earth)
Force: A push or a pull
Lodestone: A form of the mineral magnetite that is naturally magnetic or has become
magnetized
Magnet: An object that sticks to iron or steel
Magnetism: A property of certain kinds of materials that causes them to attract iron or steel.
Pole: Either of two opposing forces or parts, such as the poles of a magnet
Photosphere- the outside part of the sun that can be seen where the atmosphere of the sun
becomes clear to visible light
Chromosphere- a layer of the sun that is ten times hotter than the photosphere
Corona- a layer of a star that escapes the star’s gravity and extends millions of miles into space
as solar wind
Magnetic Field- a region around a magnetic material within which the force of magnetism acts
Surface- the outermost layer of something
Atmosphere- a layer of gases surrounding the Earth or another celestial body
Sun- is a middle-aged yellow star that is more gigantic than the normal star. It helps and takes
care of life on Earth.
Solar flare- tremendous explosions on the surface of the Sun that release energy
Solar wind- a stream of charged particles ejected from the Sun constantly in all directions
Coronal Mass Ejection (CMEs)- a massive burst of solar wind
Sun spot- a relatively dark, cool spot on the Sun’s photosphere caused by intense magnetic
activity; most solar flares originate from sunspots
Concepts:
-The Earth is a big magnet, with a north and south pole.
-Magnetism is a fundamental force of our Universe. A magnetic field is a bubble-shaped force
that attracts or repels magnetized materials, such as iron or steel.
-The Sun constantly ejects charged particles in all directions in the form of solar wind. Some of
these particles hit the Earth’s magnetic field. This can disrupt telecommunications and satellites,
and we can see the particles on Earth in the form of an Aurora.