With a telescope, you can easily see _______ on the moon.
craters
gravity
astronomer
space probe
An ________ knows a lot of information about the solar system.
astronomer
core
craters
distance
The moon has weaker __________ than the Earth, so astronauts weigh less there.
astronomer
surface
gravity
matter
It takes Earth one year to complete one _______ around the sun.
distance
craters
surface
orbit
Earth and Venus are close in size. They have similar ________ .
diameters
matter
craters
surface
The _________ from Earth to the moon is about 384,000 kilometers.
gravity
diameter
core
distance
________ travel through space and send information to Earth.
Space probes
Matter
Craters
Astronomers
The moon's ________ is very gray, rocky, and full of craters.
crater
gravity
core
surface
The sun has the most _______ in the solar system.
gravity
core
matter
craters
It is very hot in Earth's ______ .
gravity
orbit
surface
core
Each planet in the solar system is _______ in different ways.
distance
surface
matter
unique
The ________ between Chiang Mai and Bangkok is 692km.
diameter
core
distance
gravity
