The key answer of exercise 4
The key to exercise solutions in chapter 11 - Did you know ...? for the textbook Outcomes Pre-Intermediate - Student's Book with authors Hugh Dellar and Andrew Walkley from National Geographic Learning
Question
Work in groups. Compare your ideas using the words in Exercise 2 and your notes.
Answer
- Yes and no: there are some genetic factors, but other factors are due to the environment.
- Their feet are covered in hairs, which are covered in other hairs. The electric charge on the hairs makes the spider stick to the ceiling.
- Graphene is a very thin layer of graphite, it’s the world’s thinnest material, but incredibly strong.
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