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True/false. The Earth
EduBook Organización
- 1358 visitas
Are the following sentences true or false? Water on Earth exists in three different states. The size of the Earth has nothing to do with its capacity to sustain life. The atmosphere is essential for…
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End-of-unit evaluation - Our planet Earth
EduBook Organización
- 1353 visitas
Most of the Earth is made up of the geosphere. This is a large sphere of rock with a diameter of 13000 km. A large part of the geosphere is covered by the hydrosphere. This is a layer of liquid water…
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Sound and noise
EduBook Organización
- 1320 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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Danger in the Lagoon
EduBook Organización
- 1368 visitas
Peter, Wendy, John, Michael and the Lost Boys often go to the Mermaids’ Lagoon. The water is blue and beautiful. They like swimming and playing in the blue lagoon. Beautiful mermaids live here, and…
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Comprehension check (PET)
EduBook Organización
- 1351 visitas
Read these sentences about Chapter Eight. Decide if each sentence is correct or incorrect. Hans managed to save only the food from the water. Axel and his uncle found some shells of prehistoric…
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Moss and soil
EduBook Organización
- 1252 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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The Lost City
EduBook Organización
- 1315 visitas
Everything in the Lost City is very old. There is a big palace on a hill and a water fountain near the King’s garden. The houses don’t have any roofs1 and trees are growing inside them. The Monkey…
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Think and answer. Spermatozoids
EduBook Organización
- 1232 visitas
Look at the diagram on the right. It shows the sexual reproduction of Sargasso seaweed, found in the Atlantic Ocean. Each spermatozoid has two small tails to help it swim to the ovules. What do the…
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