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Recursos educativos
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Final self-evaluation 1.6 - Matter and Materials
EduBook Organización
- 1927 visitas
Complete the following sentences with the missing words: A group of atoms is called a . move around the nucleus of an atom. are made up of two or more different chemical elements. The formula for is…
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Check. The Earth's relief
EduBook Organización
- 9441 visitas
Review what you have studied in this section and answer the questions: What are the names of the largest mountain ranges on the American continent? What mountain ranges are there in Asia? Which is the…
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Villages, towns and cities
EduBook Organización
- 7927 visitas
We live in communities called villages, towns and cities. Villages are small. Few people live in them. Towns are bigger than villages. Many people live there. Cities are bigger than towns. Some cities…
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Activities - Villages, towns and cities
EduBook Organización
- 1 lo usan
- 5915 visitas
We live in communities called villages, towns and cities. Villages are small. Few people live in them. Towns are bigger than villages. Many people live there. Cities are bigger than towns. Some cities…
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Introduction - Villages, towns and cities
EduBook Organización
- 5294 visitas
We live in communities called villages, towns and cities. Villages are small. Few people live in them. Towns are bigger than villages. Many people live there. Cities are bigger than towns. Some cities…
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Remember - Villages, towns and cities
EduBook Organización
- 4891 visitas
We live in communities called villages, towns and cities. Villages are small. Few people live in them. Towns are bigger than villages. Many people live there. Cities are bigger than towns. Some cities…
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AIDS | Educational Video | HIV: ethical aspects
Xplore Health Organización
- 3981 visitas
What are the difficulties associated with treatments for AIDS? What shortfalls do prevention campaigns suffer from? Why are there so many people who are infected but don't know they are? Do you…
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The chemical composition of living things
EduBook Organización
- 1 lo usan
- 3708 visitas
2.1. Bioelements Bioelements are the chemical elements that form part of all living matter. There are around 70 bioelements, although not all of them are present in all organisms. Bioelements can be…
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Learn. Some optical instruments - Waves. Light and sound
EduBook Organización
- 3843 visitas
Some optical instruments Most optical instruments, like microscopes or telescopes, consist of lenses, mirrors and prisms. Lenses Lenses are disc-shaped, and one or both sides are curved. They are made…
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Changing states of matter
EduBook Organización
- 3732 visitas
5.1. States of matter You have already learnt that there are three states of matter in nature: solid, liquid and gas. Remember that solid particles have low mobility as they are in a fixed position.…
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