Unit 9 Vocabulary Flashcards
Master the vocabulary of Unit 9
space
The area beyond Earth’s atmosphere
stars
Huge glowing balls of gas
telescope
A long tube with a lens at each end to collect light
satellite
An object that orbits another object in space
space probes
Uncrewed vehicles that are used to collect information to send back to Earth
astronomical unit
The average distance from the sun to Earth
inner planet
Small and rocky planet (like Earth)
outer planet
Huge and made mostly of gases
asteroid belt
A band of asteroids that orbit together in this part of the solar system
asteroid
Chunk of irregularly shaped rock that orbit the Sun between a planet
dwarf planet
Round bodies that orbit the Sun
comet
Small bodies made of lumps of rock, metal and dust covered with ice
crater
Formed when asteroids or meteorites strike its surface
