The earth revolves around the sun once every , year, month , we called the movement of earth around the sun : , rotation , revolution , The position of the earth facing the sun has : , daylight, night, The position of the earth facing away the sun has:, night, light, Examples of artifical sound : , dog sound, musical instruments, part of ear has three tiny bones : , middle ear, outer ear, sounds come into our : , inner ear, outer ear, its protect the middle and inner ear:, eardrum, inner ear, Sounds can travel through solid faster than liquid ? , No, Yes, The movement of sounds called:, Vibration, natural sounds, sounds cant travel through gas material ?, Yes, No, inner ear is a tiny tube filled with liquid and hair : , inner ear, middle ear, Example of natural sounds:, boy shouting , teacher voice, A&b, "It results from the Earth's rotation around the Sun.", four seasons , day and night .

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