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The chemical composition of living things
EduBook Organización
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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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Final Autoevaluation 1.07 - Plant nutrition
EduBook Organización
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Answer true and false: The raw sap consists of water and mineral salts. The xylem is a tissue shaped like hollow tubes and is made up of dead cells. The elaborated sap is absorbed through the root…
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Cafè de Comerç Just a Chiapas
Tiching explorer Organización
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Documental sobre la producció de cafè orgànic i de comerç just; una alternativa de la producció especulativa de grans inversors. Unes compres que fan que el preu del cafè pateixi grans…
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Unit 8: Energy and industry
EduBook Organización
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Biomass (n): organic material used as a fuel that releases energy when burned. craftsperson (n): a person who makes products using basic tools and manual labour. Craftspeople were very common before the…
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Fertilisers
EduBook Organización
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Fertilisers are mixtures of chemical substances, including many biolelements. They are used to enrich the soil and improve plant growth. They usually contain nitrogen, phosphorus, potassium and…
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Match. Traditional sources of energy 02
EduBook Organización
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Look at the characteristics of the fossil fuels and match them with the correct energy source: It is a liquid formed over millions of years through the decomposition of organic matter. It also takes…
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Interpret. A table
EduBook Organización
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In order to analyse the amount of humus in the soil, we react a sample of it with hydrogen peroxide. The carbon in the organic material reacts with this compound and as a result, the reaction gives off…
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Final self-evaluation 10 - The Diversity of Life
EduBook Organización
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Complete the sentences with the missing words: bacteria live on decomposing organic material. live in association with other organisms, so that both organism benefit. Trypanosomes are parasitic that…
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Identify. Alternative energy 02
EduBook Organización
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Identify which energy source each definition refers to: It uses the Sun's radiation. It uses the movement of waves and currents. It is obtained from burning or fermenting organic material. It uses…
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Final self-evaluation 04 - Energy and industry
EduBook Organización
- 1350 visitas
Are the following sentences true or false? Industrialised countries buy minerals from large companies that extract them from other, usually poorer, countries. Oil is a fossil fuel that comes from the…
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