Earth and Space

This is a rocky mass up to several km wide that rotates around the sun.

• comet
• dust
• asteroid
• moon

A spacecraft that gathers data without a crew.

• spaceship
• space station
• space probe
• rocket

This is the force of attraction that exists between two objects.

• gravity
• volume 
• mass
• density

A frozen mass of ice orbiting the sun is called a_________________.

• planet
• comet
• Milky Way
• glalxy

This is the imaginary center line which the earth rotates.

• sphere
• equator
• axis
• gravity

A____________________ is a complete spin of an object on its axis.

• revolution
• rotation
• remark
• revolve

The sun and all the bodies make up the ___________________.

• satellite
• sunshine
• solar system
• planets

An object in orbit with another object is called a __________________.

• satellite
• comet
• space probe
• sun

____________________ is an indication of the fraction of the moon that is illuminated as seen from Earth.

• man in the moon
• moon phase
• moon time
• galaxy

A full orbit of an object around another object is called a__________________

• rotation
• revolution
• rotate
• remake