Math in Nature
World Geography
Famous Scientists
Cool Chemistry
Space and Beyond
100

This sequence, starting with 0 and 1, where each number is the sum of the two preceding ones, appears frequently in nature.

the Fibonacci sequence

100

This is the smallest country in the world, located entirely within the city of Rome.

Vatican City

100

This physicist developed the theory of relativity and is famous for the equation E = mc^2.

Albert Einstein

100

This common kitchen substance, when mixed with vinegar, produces carbon dioxide gas, causing a fizzy reaction.

baking soda

100

This is the closest planet to the Sun in our solar system.

Mercury

200

This shape, often seen in beehives, is the most efficient for packing the maximum amount of space with minimal material.

a hexagon

200

This river is the longest in the world, flowing through northeastern Africa.

the Nile River

200

This scientist is known as the father of modern physics and discovered the law of gravity when an apple fell on his head (according to legend).

Isaac Newton

200

This element, represented by the symbol H2O, is essential for all life on Earth.

water

200

This is the name of our galaxy, which contains billions of stars, including our Sun.

the Milky Way

300

This spiral, seen in galaxies and seashells, follows the Fibonacci sequence and is also known as the "golden spiral."

the logarithmic spiral

300

This is the only continent that is also a country.

Australia

300

This female scientist won two Nobel Prizes, one in Physics and one in Chemistry, for her work on radioactivity.

Marie Curie

300

The process by which plants convert sunlight into energy, producing oxygen as a byproduct.

photosynthesis

300

The largest planet in our solar system, known for its Great Red Spot.

Jupiter 

400

The number approximately equal to 3.14159, which represents the ratio of a circle’s circumference to its diameter.

pi   

400

This is the largest desert in the world, which isn’t hot but cold.

Antarctica

400

This naturalist developed the theory of evolution by natural selection after studying finches in the Galápagos Islands.

Charles Darwin

400

This element, used in balloons, is lighter than air and causes balloons to float.

helium

400

This dwarf planet was once considered the ninth planet of our solar system.

Pluto

500

These patterns, found in clouds, mountains, and coastlines, are self-similar at different scales and are described by fractal geometry.

fractals

500

This is the name of the world's highest waterfall, located in Venezuela.

Angel Falls

500

This astronomer was the first to propose that the Earth and other planets revolve around the Sun, rather than the other way around.

Nicolaus Copernicus

500

This type of reaction absorbs heat from its surroundings, making the environment cooler.

an endothermic reaction

500

The force that keeps planets in orbit around the Sun.

gravity

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