2.12 Read and listen to the text.
Then answer the questions.
1 What are tectonic plates?
2 How many layers is the Earth made up
3 What is a hypocentre?
4 What does a seismograph measure?
5 How many earthquakes occur every year?

Mariya197819 Mariya197819    1   28.12.2020 12:21    1

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