Difficult Round Quizebee

The famous scientist who developed the theory of relativity?

In what year did the Berlin Wall fall, symbolizing the end of the Cold War?

What is the largest desert in the world ?

Which gas makes up the majority of Earth's atmosphere?

What is the process by which plants make their own food using sunlight?

If 90% of a given number is 18, then what is 50% of the given number?

Who is the first Filipino female leader of the revolutionary movement against the Spanish colonizers?

Who is the forgotten President of the Philippines?

The first Republic of the Philippines was established during a war. Which one?

What was the first book published during the Spanish period in the Philippines?