General knowledge
The largest ocean on Earth
Pacific
The civilization that built Machu Picchu.
Inca
The largest continent by land area.
Asia
The sport in which players compete for the Wimbledon title.
Tennis
The force that pulls objects toward Earth.
Gravity
The hardest naturally occurring mineral
Diamond
The wall that fell in 1989, symbolizing the end of the Cold War.
Berlin
The capital of Australia.
Canberra
The swimmer who has won the most Olympic gold medals.
Phelps
The process by which plants make food using sunlight.
Photosynthesis
The mountain range that separates Europe and Asia.
Urals
The explorer who reached the Americas in 1492.
Columbus
The highest waterfall in the world
Angel
The NBA player nicknamed "King James."
LeBron
The largest organ in the human body.
Skin
The deepest ocean trench on Earth.
Mariana
The king whose tomb was discovered nearly intact in 1922.
Tutankhamun
The river that forms much of the border between the United States and Mexico
RioGrand
The only country to have appeared in every FIFA World Cup.
Brazil
The galaxy that contains our Solar System
MilkyWay
The supercontinent that existed about 300 million years ago.
Pangaea
The explorer who reached India by sea for Portugal in 1498
Gama
The largest island in the Mediterranean Sea.
Sicily
The country that invented the sport of basketball.
Canda
The branch of physics that studies light.
Optics