Page 10 - My FlipBook

atmosphere: The mixture oxygen: The most common
of gases that surrounds a planet element found on or in Earth
or celestial body. that makes up air and part
aurora: A luminous phenomenon of Earth’s atmosphere.
that consists of light appearing particles: Extremely small
in the upper atmosphere of a pieces of something.
planet’s magnetic polar regions. solar system: The sun together
core: The central part of Earth with the planets, many moons,
that is very hot. asteroids, and comets that move
energy: Power from a source in orbit around it.
that produces light and heat. solar wind: The continuous flow
equator: An imaginary line of charged particles that ejects
around the middle of Earth from the sun’s surface and into
that is an equal distance from outer space.
the North and South Poles.
magnetic field: The part of space
in which magnetic forces can be
found. It extends from Earth’s
core and into outer space, where
it interacts with the solar wind.

nitrogen: A gas that makes
up much of the air in Earth’s
atmosphere.

Northern Hemisphere: The half of
Earth that is north of the equator.