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Week30 index - PowerPoint PPT Presentation

Quiz/Review

Quiz/Review. Get out a small piece of paper and put your name on it. When the bell rings, the quiz will begin. Question 1. How many major mass extinctions have there been?. Question 2. How many species were alive that are now extinct?. Question 3. What could cause a mass extinction?.

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Week30 index - PowerPoint PPT Presentation

Quiz/Review