Can you correctly answer these questions?

1. What is a period?
2. What do you do to the first letter of every sentence?
3. What is four multiplied by nine then divided by three?
4. How far from the Earth is the sun?
5. What is the official language of the US?
6. How many continents are there?
7. What is a primary color? What is a secondary color?
8. What is the opposite of blue?
9. How many planets are there? What are their names?
10. What was the first constitution of the United States?

No Googling or Wikipedia-ing.