How many known moons are there in our solar system?

• 178

• 150

• 100

• 200

What is the Milky Way?

• A galaxy

• A star

• A solar system

• A planet

Tags

NGSS.MS-ESS1-2

What is the sun made of?

• Burning gases

• Ice

• Rock

• Water

Tags

NGSS.MS-PS1-1

What is a light-year?

• A year on the sun

• Distance light travels in a year

• A year on Earth

• A year on the moon

Which of the following is NOT a requirement for a planet?

• Must clear its orbit

• Must orbit a sun

• Must be made of gas

• Must be spherical