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Things that move - Fire engine•Things that move - Train•Things that move - Aircraft•Things that move - Truck•Things that move - Car•Things that move - Police•Things that move - Bus•Things that move - Ambulance•Time to Be Confident•Time to Be Curious•Time to Be Mindful•Time to Be Patient
Earth, our home, is the third planet from the sun. It is the only planet known to have an atmosphere containing free oxygen, oceans of liquid water on its surface, and, of course, life. .. About a fifth of Earth's atmosphere is made up of oxygen, produced by plants.