1. | The animal kingdom is formally classified into major groups known as |
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2. | The Earth is surrounded by an insulating blanket of gases which protects it from the light and heat of the Sun. This insulating layer is called the |
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3. | Which gas in the atmosphere protects us from harmful ultraviolet radiations? |
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4. | The three states of matter are solid, liquid and gas. |
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5. | Which rare element would you associate with Marie and Pierre Curie? |
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6. | The science that deals with the study of sound is known as acoustics. |
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7. | Who discovered Penicillin? |
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