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Minerals (I)
EduBook Organización
- 1610 visitas
2.1. What is a mineral? Minerals are solid and inorganic substances which have a particular chemical composition. They are formed naturally. Minerals are characterised by their perfectly ordered…
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Final self-evaluation 03 - The Earth's Crust
EduBook Organización
- 1606 visitas
Are the following sentences true or false? The Earth's outermost layer is called the crust. Ocean trenches are long, narrow depressions in the floor of the ocean. The most common elements in the…
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Sound and noise
EduBook Organización
- 1595 visitas
What is sound? Sound is produced by vibrating objects. We perceive sound because we use our sense of hearing. When an object produces a sound, it travels through the air or other objects (walls,…
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Moss and soil
EduBook Organización
- 1587 visitas
Mosses have a very important ecological role. They actively participate in forming the soil and prevent it from eroding and drying up: The rhizoids help to break down rock into small particles. When the…
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Past continuous and past simple
EduBook Organización
- 1632 visitas
While + the Past Continuous Look at these examples: Virginia (talk) to the Ghost (long action) + She (become) angry (sudden action) While Virginia was talking to the Ghost, she became angry. She (come)…
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Learn... Orientating ourselves
EduBook Organización
- 1549 visitas
Traditional methods The position of the Sun can help us find our location during the day. The Sun rises in the east and sets in the west. At midday, the Sun is at its highest point, and in the south.…
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True/false. Characteristics of Prehistory
EduBook Organización
- 1559 visitas
Decide if the following statements are true or false: Prehistory was the first period of humanity and lasted hundreds of years. ➝ All we know about Prehistory comes from written documents from the…
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Grammar check!
EduBook Organización
- 1605 visitas
Look at these sentences: Will Scarlett was a good archer, but Robin was the best. Robin and his men were the best archers of the region. Best is a superlative. Some superlatives are irregular. Look at…
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Learn. Do a population survey
EduBook Organización
- 1501 visitas
When we ask a series of questions to a group of people in order to get information, it is called a survey. Surveys can provide us with useful and interesting information. What do we do? To learn how the…
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