Unit2 vocabulary

1. The________of Earth is similar to the diameter of Venus.

• Surface

• Distance

• Diameter

• Gravity

2. The plants that are closer to the Sun have smaller _________, so they take less time to go around it.

• Matter

• Unique

• Orbit

• Distance

3. The stone rolled down the hill by______________.

• Core

• Gravity

• Orbit

• Distance

4. The_____________uses the advanced telescope to study the surface of Mars.

• Matter

• Space probe

• Observatory

• Astronomer

5. 5. Fingerprints are___________to every individual.

• Uniqlo

• Uncertain

• Unique

• Important

6.Mercury and our Moon both have__________on their surface.

• Astronomer

• Craters

• Gravity

• Space probe

7.There is a big__________between the Sun and earth.

• Orbit

• Diameter

• Space

• Distance

8.The structure of the earth is divided into three chemical layers: the crust, the mantle, the _______.

• Inside

• Surface

• Center

• Core

9.Planets and stars are full of__________.

• Matter

• Meteorite

• Galaxy

• Universe

10.A___________is a device sent to explore space and gather scientific information.

• Observatory

• Telescope

• Astronomer

• Space probe