10.4.1 What other possible explanations can you think of for the extinction of the dinosaurs?
10.4.2 What evidence would support or refute the possibilities you envisaged in 10.4.1?
10.4.3 Assume that what the passage says is true; how strongly does it support the explanation it offers?
10.4.4 Assume that what the passage says is true and bring in anything else you know about the death of the dinosaurs to produce the best argument you can to explain their extinction.
10.4.5 Suppose we discovered in the fossil record that some species of plants which require very little light did not die out at the same time as the dinosaurs. What does that tell us?
10.4.6 Suppose we discover that in fact different species of dinosaurs died out at different times separated by intervals of hundreds of thousands of years. What does that tell us?
10.4.7 Suppose we discover that there have been other mass extinctions of species at other periods in the Earth’s history. What does that suggest?
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