OD4 Unit 2 Vocabulary

1. What is this?

• astronomer

• diameter

• surface

• space probe

2. What is this?

• diameter

• bodies

• space probe

• core

3. What is this?

• space probe

• core

• bodies

• diameter

4. What is this?

• unique

• explore

• core

• gravity

5. What is this?

• gravity

• astronomer

• orbit

• explore

6. What is this?

• matter

• surface

• astronomer

• inner

7. What is this?

• explore

• distance

• crater

• matter

8. What is this?

• core

• unique

• diameter

• crater

9. What is this?

• surface

• orbit

• outer

• astronomer

10. What is this?

• inner

• crater

• unique

• distance