What is the approximate age of the Earth?

What causes seasons on Earth?

What is the Earth's outermost layer called?

Which layer of Earth is made mostly of molten rock?

Which force keeps everything on Earth pulled toward its center?

What is the name of the supercontinent that existed millions of years ago?

What is the study of Earth called?

What is the line that divides Earth into Eastern and Western Hemispheres?

Which layer of the atmosphere is closest to Earth?

What phenomenon occurs when the Moon blocks sunlight from reaching Earth?

What causes earthquakes?

What are large moving pieces of Earth's crust called?

Which ocean is the deepest on Earth?

What protects Earth from meteoroids burning up before reaching the surface?

What percentage of Earth's surface is land?

Which continent has the most countries?

What is the Earth's diameter approximately?

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

What is the imaginary line around Earth tilted at about 23.5°?

Which instrument is used to measure earthquakes?