This Science quiz is called 'Respiration 1' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
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When breathing (respiration) takes place, oxygen is taken in from the air and carbon dioxide and water vapor are breathed out. But there is much more to it than that!
See how well you understand the finer points of respiration in the following Science quiz - and don't forget to breathe!