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Summaries - Society and the environment
EduBook Organización
- 2605 visitas
1. The Earth is an ecosystem The Earth is a complex ecosystem because it is made up of closely interrelated elements. These elements are: Lithosphere, or the Earth’s surface. Hydrosphere, or all of…
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End-of-unit evaluation - The representation of the Earth: maps
EduBook Organización
- 2576 visitas
In the past, cartography (or map making) was a very slow process. It involved observation and complex calculations and drawings. Modern maps are made using aerial photos and images from satellites…
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Introduction - Water
EduBook Organización
- 2579 visitas
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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End-of-unit evaluation - The Hydrosphere
EduBook Organización
- 2550 visitas
The hydrosphere is the part of the Earth where water can be found. This water includes oceans, seas, rivers, lakes, snow, ice, groundwater and water vapour in the atmosphere. The Earth is the only…
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Self-evaluation 2 - Weather and climate
EduBook Organización
- 2529 visitas
Which concepts do the following definitions refer to?: It is the degree of warmth in the air due to solar radiation. It is a gaseous layer more than 1 000 kilometres thick that surrounds the Earth. It…
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Ocean dynamics
EduBook Organización
- 2527 visitas
3.1. How oceans and seas move The water in oceans and seas is always moving because of waves, tides and ocean currents. Waves Waves are caused by wind moving the water on the surface of the sea. The…
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Calculate. Force and pressure
EduBook Organización
- 2507 visitas
Remember what you have studied in this section and answer the questions: What pressure is exerted on the ground by a person with a mass of 80 kg wearing skis with a total surface area of 0.6 m2? We have…
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The beginning of life
EduBook Organización
- 2496 visitas
1.1. The Earth, our planet The Earth is the only planet in the Solar System that has all of the conditions for life to develop. These conditions are the following: Its size, which allows the force of…
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End-of-unit activities - The representation of the Earth: maps
EduBook Organización
- 2480 visitas
In the past, cartography (or map making) was a very slow process. It involved observation and complex calculations and drawings. Modern maps are made using aerial photos and images from satellites…
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True / False. The cerebrum
EduBook Organización
- 2410 visitas
Are these sentences true or false? The cerebrum is the most important nervous centre in our body. It contains nearly one million neurons. The outer surface, which is 1.5 to 4 millimetres thick, is…
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