Grade 6 Study Guide: Space: Test Date: Friday, February 20th
TERM
DEFINITION
Astronaut
Someone who travels in space
Mars
Our closest neighboring planet
Stars
A huge ball of burning gas held
together by its own gravity
Lunar
Used to describe anything of or
relating to the moon
The moon
Orbits the Earth once every 28 days
Milky way
The name of our galaxy
Neptune
Is the 8th planet from the sun
Space Station
This orbits the Eat 16 times a day
Earth
Our home planet
Venus
The second planet from the Sun
Energy
The ability to do work
The Sun
Is the center of our solar system
Research
Is to study and observe something to
learn more about it
Everything that exists anywhere on
Earth or in space
The universe
Solar system
Contains the sun and all the planets
that orbit the sun
Mercury
Is the planet closest to the sun
Saturn
Is the 6th planet from the sun and is
known for its rings
Technology
Space
Is science as it is put to use in the work
of everyday life
Everything beyond the Earth’s
atmosphere, where the sun, stars and
other planets are
Galaxy
Stars and solar systems grouped
together
Dust
The dust coming off a comet which
forms a dust tail
Meteor showers
Occur when Earth passes through a
comet’s orbital debris
Comet
Is a small body of ice, rock and
cosmic dust orbiting the sun
Phases of the moon
Occur when the moon is between the
sun and Earth
Satellite
A natural or artificial body revolving
around a planet
A meteoroid that reaches Earth’s
surface
Meteorite
Asteroid
A small, rocky body revolving around
the sun
Asteroid belt
Lies between the orbits of Mars and
Jupiter
Terrestrial planets
Are the rocky planets of the inner
solar system
Astronomical unit
Is the average distance between
Earth and the sun
Ellipses
All orbits are ellipses which are
stretched out circles
Comets
Small bodies of ice and dust
Titan
Is the largest moon in our solar system
Oort cloud
A huge collection of comets that
completely surrounds the solar system