Page 43 - 新思维科学学生用书9 样章

1 Photosynthesis and the carbon cycle

Project: What happened to the dinosaurs?

You are going to work in a group to contribute to a display about the extinction of
the dinosaurs.

Choose one or more of these issues to research. Try to make sure that each group

researches a different issue.

Issues to research
• Who first developed the idea that there was an asteroid impact that killed the
dinosaurs? When did they put forward this theory, and what was their evidence?
• What do scientists think could have happened as a result of the asteroid
impact? What is their evidence?

• Scientists think that other events may have contributed to the extinction of the
dinosaurs. What are these events, and what is the evidence for them?
• How have the early theories changed over time? Why have they changed?

• Are dinosaurs really extinct? Some biologists think that a very familiar group of
animals that live on Earth today are really dinosaurs. What are they, and why do
biologists think this?

Doing your research
Use the internet to find information.

Before you begin, discuss in your group how you will choose the most trustworthy
websites.

Here are some possible search terms you could try:

• dinosaur extinction event
• asteroid in the Cretaceous period
• Luis Walter Alvarez
• asteroid impact

• living dinosaurs.

Making the display
Work with the rest of the class to decide how the
display will be made. For example, each group
could produce a poster containing the results of

their research. The posters could be displayed
on the wall together. Alternatively, you could
work together to create a multimedia class
presentation.

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