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External forces in the formation of relief
EduBook Organización
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3.1. External forces Relief is not only the result of movements inside the Earth. External forces, such as the effect of water or wind, can also change the shape of the planet's surface. The action…
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Internal forces in the formation of relief
EduBook Organización
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2.1. Internal forces Below the surface of the Earth, gases and compressed materials put pressure on the crust. They can deform it or make it crack. These internal forces are what cause earthquakes and…
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The Atmosphere
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The Earth is surrounded by a mixture of gases we call the atmosphere. The air we breathe is part of the atmosphere. The atmosphere is composed of a series of layers. The most important layer is the…
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Introduction - Rivers and seas
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The hydrosphere is made up of all the water on the Earth. This includes the water in the seas, oceans, rivers, lakes, polar ice caps, groundwater and the water vapour in the atmosphere. Water is the…
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End-of-unit evaluation - Rivers and seas
EduBook Organización
- 5545 visitas
The hydrosphere is made up of all the water on the Earth. This includes the water in the seas, oceans, rivers, lakes, polar ice caps, groundwater and the water vapour in the atmosphere. Water is the…
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End-of-unit activities - Rivers and seas
EduBook Organización
- 5451 visitas
The hydrosphere is made up of all the water on the Earth. This includes the water in the seas, oceans, rivers, lakes, polar ice caps, groundwater and the water vapour in the atmosphere. Water is the…
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Unit 7: Society and the environment
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- 1 lo usan
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Acid rain (n): contaminated rain that damages vegetation, is harmful to animals and pollutes lakes and rivers. carbon dioxide (n): a gas found naturally in the Earth's atmosphere. Its increase due…
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Activities - Water
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- 1 lo usan
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Water covers a lot of the Earth's surface. We can find water in oceans, seas and rivers. We can also find water in clouds and in snow on mountains. All living things need water. All animals need…
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Final Autoevaluation T12 03 - Waves. Light and sound
EduBook Organización
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Answer these questions: What do we use to see how white light is made up of many colours? Can a lunar eclipse happen if the sun is between Earth and the Moon? What is closer to the Earth in a solar…
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