This Science quiz is called 'Atoms and Elements 3' 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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Hydrogen and plutonium are just two examples of elements. Of the 118 known elements, the first 94 occur naturally on Earth. Of these, oxygen is the most abundant element in the Earth's crust (which is handy as we need oxygen to survive!).
Test your knowledge in our third Science quiz on Atoms and Elements.
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