Kuo Kang Chen Books
Sound
By Terry Cash
Introduces the principles of sound and includes instructions for a variety of experiments examining such topics as echoes, acoustics, and the speed of sound.
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Sun moon and stars
Answers questions such as 'What is the sun made of?" and "How did astronauts get to the moon?" plus others on what's out in space. What is the Sun made of? How did astronauts get to the Moon and wh...
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