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Think about it. Trophic relationships in ecosystems
EduBook Organización
- 2413 visitas
Remember what you have studied in this section and answer the questions: Are feeding relationships intraspecific or interspecific? Explain your answer. Why can there only be four or five trophic levels?…
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Final self-evaluation T11 05 - A bipolar world: the cold war and decolon...
EduBook Organización
- 2410 visitas
Complete the text with the missing words: Zedong – Kuomintang – 1935 – kilometres – socialist – March – Yenan Between 1934 and , the communists, led by Mao , were the protagonists of the…
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Complete. Inhaling and exhaling
EduBook Organización
- 2415 visitas
Complete this text with the correct words: Air is renewed in the pulmonary alveoli of the lungs when we and . We use a large muscle called the and the muscles. The diaphragm is located below the . It is…
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The Deterioration of water: a global problem
EduBook Organización
- 2394 visitas
The overexploitation of rivers and aquifers causes major changes to ecosystems, serious conflicts between states and health problems for the population. Some examples are: In the Bay of Bengal,…
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Video: Introduction to Vectors and Scalars
Khanacademy Organización
- 3400 visitas
This 8 minute tutorial explains the difference between vectors and scalars with practical examples. We can listen to specific vocabulary such as "magnitude", "size",…
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Analyse. Historic migrations
EduBook Organización
- 2374 visitas
The movement of populations People have been on the move since prehistoric times due to political, economic, social or religious factors. An example of migration motivated by economic factors was when,…
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Learn. Interpreting data
EduBook Organización
- 2382 visitas
The object of this exercise is to find out which factors are used to calculate the Human Development Index (HDI). By analysing the statistics, you can find out about the relationships between them and…
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Look at this photo of the past and answer the questions
EduBook Organización
- 2356 visitas
Look at this photo of the past and answer the questions: In which decade do you think it was taken? Is the photo of a village or a city? How do you know? What means of transport did people use? What…
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Minerals (II)
EduBook Organización
- 1 lo usan
- 2158 visitas
3.1. Mineral properties Mineralogy is the science of studying minerals. Minerals can be identified according to their physical and chemical properties. The most important properties are density,…
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End-of-unit evaluation - Society and the environment
EduBook Organización
- 2356 visitas
The human impact on the environment has intensified in recent years. There are lots of reasons for this, such as the growth of consumption and the expansion of cities and industry. Another reason is the…
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