Space & Astronomy
Inventions/ Discoveries
Sports & Games
Nature & Environment
Brain Teasers
100

This is the closest star to Earth.

What is the Sun?

100

This American inventor is credited with the light bulb.

Who is Thomas Edison?

100

This sport uses a bat, a ball, and bases.

What is baseball?

100

These tall plants are common in tropical rainforests and have large leaves.

What are palm trees?

100

This shape has exactly three sides.

What is a triangle?

200

This planet is famous for its rings.

What is Saturn?

200

Alexander Fleming discovered this antibiotic in 1928.

What is penicillin?

200

In chess, the only piece that can “jump” over others.

What is the knight?

200

The process by which plants make their own food from sunlight.

What is photosynthesis?

200

What 5‑letter word becomes shorter when you add two letters?

What is short?

300

The Milky Way is this type of galaxy.

What is a spiral galaxy?

300

This device, invented by Gutenberg, changed how books were made.

What is the printing press?

300

This country has won the most FIFA World Cups.

What is Brazil?

300

The world’s largest coral reef system.

What is the Great Barrier Reef?

300

A palindrome reads the same forward and backward. This is one example.

What is “racecar”?

400

This force keeps planets in orbit around the Sun.

What is gravity?

400

Marie Curie discovered two radioactive elements: polonium and this.

What is radium?

400

The Olympic Games began in this ancient civilization.

What is Ancient Greece?

400

These animals, like salmon, return to their birthplace to reproduce.

What are migratory species?

400

If you rearrange the letters in “listen,” you get this word meaning to stay quiet.

What is “silent”?

500

This is the name of the point where nothing can escape a black hole.

What is the event horizon?

500

This mathematician invented calculus independently at the same time as Isaac Newton.

Who is Gottfried Leibniz?

500

In poker, this hand is made up of five consecutive cards of the same suit.

What is a straight flush?

500

This biome is characterized by frozen ground known as permafrost.

What is the tundra?

500

This term refers to a puzzle where you fill in words based on numbered clues.

What is a crossword?