Mountains
The largest mountain range in North America.
What are the Rocky Mountains
Usually thought of as the longest river in the US, though now another river is said to be a few miles longer. It is arguable the most well known and runs to the Gulf of Mexico.
What is the Mississippi River?
The largest of the continents.
What is Asia?
This country has more people than any other continent on Earth.
What is India? (which has recently surpassed China at around 1.4-1.5 billion)
The season is it in Australia right now, assuming we are still in Spring.
What is Fall?
The highest mountain in the world.
What is Mount Everest?
The largest river in South America. It has a higher volume of water than any other river. The world's largest rainforest also has the same name.
What is the Amazon River?
The smallest of the continents.
What is Australia?
The South American country with the largest Portuguese speaking population outside of... Portugal.
What is Brazil?
The largest desert in the world.
What is the Sahara?
The highest and most famous Mountain in Japan; it is featured in many pictures and paintings.
What is Mount Fuji?
This is traditionally known as the longest river in the world. Some now challenge that notion. It runs through Egypt and nearly all of the 100+ million people live near to it.
What is the Nile?
Name a continent in the Western Hemisphere.
What is North or South America?
This country has the largest population in Africa.
What is Nigeria?
The name of the deepest part of the ocean, at more than 35,000' below the surface. Bonus for the ocean in which it is located.
What is the Mariana Trench? (the Pacific Ocean)
The highest mountain range in South America and second highest range in the world.
What are the Andes?
This large river in Africa also bears the name of the 2nd largest rainforest.
What is the Congo?
The coldest temperature on Earth happened on this continent.
What is Antarctica?
It's language is Dutch. It's capital of Amsterdam is known for its canals and waterways. They have a large area reclaimed from the sea using rock walls and pumps.
What is the Netherlands?
The most common religion in the world.
What is Christianity?
The highest mountain in the US.
What is Mount McKinley?
This river in China gets is name from the colored sediment it carries.
What is the Yellow River?
The second largest of the continents.
What is Africa?
Name the two countries (three for bonus) that make up the Iberian Peninsula.
What are Spain, Portugal... and Andorra.
The deepest lake in the world, and the one with the most fresh water in it.
What is Lake Baikal, Russia?