1. How many continents are there, most commonly taught?
2. Which river is usually considered the longest in the world, flowing through Egypt to the Mediterranean Sea?
3. Which invention, made practical by Thomas Edison and others in the late 1800s, gave people electric light in their homes?
4. The Amazon River flows mainly through which continent?
5. What is the correct term for the huge collection of stars, including our Sun, that we belong to?
6. Roughly when was the World Wide Web invented, making the internet easy for ordinary people to use?
7. Which desert, found along the coast of Chile, is often called one of the driest places on Earth?
8. Ancient Greece is often credited with developing an early form of what system of government, where citizens could vote?
9. What is the term for a large object, smaller than a full planet, that orbits the Sun but has not cleared its orbital path of other objects, like Pluto?
10. Which river, flowing through China, is Asia's longest river?
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