This force explains why a rolling ball eventually stops on flat ground.
What is friction?
To clearly explain or make understandable.
What is clarify?
This country has the longest coastline in the world.
What is Canada?
This document formally ended British rule over the American colonies.
What is the Declaration of Independence?
This number is both even and prime.
What is 2?
This type of energy is stored in a stretched rubber band.
What is potential energy?
A temporary stop or break in action.
What is a pause?
This mountain range separates Europe and Asia.
What are the Ural Mountains?
This invention helped spread information quickly in the 15th century.
What is the printing press?
The value of a triangle’s interior angles always equals this.
What is 180 degrees?
Sound travels faster through this state of matter than through air.
What is a solid?
To officially cancel or end something.
What is abolish?
This capital city sits on the River Thames.
What is London?
This empire was ruled by Julius Caesar before becoming an empire.
What is the Roman Republic?
This term describes a number divisible only by 1 and itself.
What is a prime number?
This organelle is responsible for energy production in cells.
What is the mitochondrion?
Something that exists only in theory, not in reality.
What is hypothetical?
This desert is the largest hot desert on Earth.
What is the Sahara?
This war followed the assassination of Archduke Franz Ferdinand.
What is World War I?
The square root of 144 equals this number.
What is 12?
This law states that every action has an equal and opposite reaction.
What is Newton’s Third Law?
To examine carefully for accuracy or truth.
What is scrutinize?
This canal drastically shortened sea travel between Europe and Asia.
What is the Suez Canal?
This agreement officially ended World War I.
What is the Treaty of Versailles?
This mathematical constant begins 3.14
What is pi?