Students progress at their own pace and you see a leaderboard and live results.
It takes the Earth _____ hours to rotate once.
Earth can complete an entire orbit around the sun in ______ days.
Earth, our home planet, is ________ largest planet in the Solar System.
Liquid water covers over ______% of the total surface of the Earth.
The Earth is the only planet in the Solar System to have _________ on its surface.
The atmosphere of the Earth is made up of 78% nitrogen, 21% __________ and other gases like carbon dioxide and argon.