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Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
What describes organisms that can use carbon dioxide and energy from sunlight to produce oxygen?   show
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What does GFP stand for   show
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What describes a species that has completely died out?   show
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show Oceans  
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show Estuaries  
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show Activities  
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show Water Pollution  
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What is harvesting a resource at an unsustainable level?   show
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show Artificial Reefs  
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show Invasive Species  
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show  
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