Unit 8
Lesson 1
Student’s Book pages 62-63
Earth
The text talks about:
- Glaciers that cover much of Earth’s surface during several ice ages.
- Disasters that caused the climate to become cold and dark.
- What geologists discover from the number of layers of rock.
- What archaeologists have found in Antarctica and what does this prove.
- There will probably be more extreme climate changes in the future.