1. What is included in the universe?

2. What do scientists call the part of the universe they can see?

3. True or False: The universe is expanding at a faster and faster rate.

4. What percentage of the universe is made up of atoms?

5. What do scientists believe fills up the 'empty space' in the universe?

6. What do scientists call matter that can't be seen with our current instruments?

7. How fast is the edge of the universe expanding?

8. What do scientists call the big explosion that started the universe?

9. What shape do scientists think that the universe is?

10. What is the most abundant element in the universe?