Sound as we know it does not exist in space. That’s because, on Earth, sound mainly travels to our ears via vibrating air molecules. Because space is a vacuum, meaning there is no matter at all ...

Get kids excited about protecting the Earth by showing them why they should love the Earth. Take some personality quizzes , tell some animal jokes, or play a recycling game .

A collection of down-to-Earth facts about our planet and its place in the solar system. This collection introduces the Sun as the main source of light and heat on Earth. It explains that the Earth ...