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Science
History
200

This is the name for the process by which plants make their food. 

What is photosynthesis? 

200

The fourth president of the United States.

What is James Madison?

300

This type of rock, such as marble, is formed by heat and pressure.

What is metamorphic?

300

This ancient Greek city-state was known for its powerful army.

What is Sparta?

400

This is the study of birds.

What is ornithology?

400

The United States bought Alaska from this country.

 What is Russia?

500

This is the study of mushrooms and other fungi.

What is mycology?

500

The first woman to make a million dollars in the United States.

What is Madam C.J. Walker?

1000

This instrument is used to measure radiation.

What is a Geiger counter?

1000

The Declaration of Independence was signed in this year. 

What is 1776?

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