Unit4 space

Earth and the rest of the solar system are located in the galaxy ___________________.

• Milky Way

• star

• Andromeda

Which planet in the solar system is the largest？

• Jupiter

• Mercury

• Mars

• Earth

Inside our solar system

在我们的太阳系内部

• Earth

• Small star

• Venus

• Large star

How many planet are there in the solar system？（Including the sun，no Pluto冥王星）

• 4

• 8

• 6

• 9

Which three planets in the solar system are blue？

• Venus

• Neptune

• Uranus

• Earth

What is at the center of the solar system?

• Earth

• stars

• Mercury

• Sun

What planet is the hottest planet in our solar system?

• Jupiter

• Mars

• Mercury

• Venus

This diagram shows phases of the moon月相变化. What motion causes the phases to be visible from Earth？

是什么样的运动使这些相位在地球上可见

• Rotation 自转of the Earth

• The Rotation of the Moon

• The Revolution（公转 ）of the Moon

• The Revolution of the Earth

Select the phase of the Moon shown in the model

• 
• 
• 

How long does it take the moon to complete its orbit around the earth?

• one day

• one month

• one year

• one week