What is the tallest mountain in the world?

Which ocean is the deepest?

Which natural wonder is located in Arizona, USA?

Which animal has the longest migration of any mammal?

Which layer of Earth is just below the crust?

Which polar region has penguins as native inhabitants?

Which mountain range separates Europe and Asia?

What is the name of the process by which plants make their food?

What is the primary gas found in Earth’s atmosphere?

Which country has the most volcanoes in the world?