Inner Planets
What are the four inner planets of our solar system in order from closest to farthest from the Sun?
Mercury, Venus, Earth, Mars
Which statement about outer planets is NOT TRUE?
a. They are made of ice and gases
b. They have solid surfaces
c. They rotate more quickly than inner planets
d. They each have rings
b. They have solid surfaces
Where is the asteroid belt located?
Between Mars and Jupiter
What is the International Space Station used for?
An orbiting research laboratory
What is the smallest dwarf planet?
Ceres
________________________ gather and focus light from space objects
telescopes
_______________________ is the average distance between Earth and the Sun
astronomical units (AU)
A ______________ is a meteoroid that strikes a planet or moon
meteorite
How many planets are in our solar system?
8
Inner planets are made of ______________ and _________
Inner planets have no _____________
rock and metals
no rings
What are comets primarily made of?
rock, ice and dust
A ______________________ is chunks of rock and ice that never clumped together to form a planet
asteroid
the outer planets are made up of _____________ and ______________
ice and gases
What happens to a planet's speed as it orbits closer to the Sun?
it increases
What is the largest dwarf planet?
Eris
A _________________ is a round depression formed by meteorite impact
impact crater
____________________ is the US government agency responsible for most space missions and space-flight technology
NASA
Inner planets are _______________ than outer planets
smaller
the __________________________ is a reflecting telescope that orbits earth
Hubble Space Telescope
Which of the following is NOT a part of our solar system?
Stars
Planets
The Sun
Moons
Stars
Moon are kept in orbit around planets by _____________
gravity