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Atoms and molecules
EduBook Organización
- 2152 visitas
3.1. Atoms The smallest units of matter are called atoms. All substances are made up of atoms. Atoms contain three types of particles: protons, neutrons and electrons. Protons and neutrons are located…
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Final Autoevaluation 1.01 - Plant nutrition
EduBook Organización
- 2136 visitas
J. van Helmont's experiment Van Helmont (1577-1644), a Flemish doctor and chemist, thought that in addition to water, air and substances in soil, other elements must be necessary for plant…
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Match. Rock types
EduBook Organización
- 2119 visitas
Match the definition to the different rock types: Rocks which are made up of grains of sand or mud that are held together by other mineral substances: Rocks which form when magma cools quickly on the…
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Final Autoevaluation 1.02 - Plant nutrition
EduBook Organización
- 2014 visitas
J. van Helmont's experiment Van Helmont (1577-1644), a Flemish doctor and chemist, thought that in addition to water, air and substances in soil, other elements must be necessary for plant…
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Self-assessment T8 01 - Nutrition, breathing and circulation
EduBook Organización
- 1868 visitas
Why does our body need food? Choose the correct sentences: Food helps us to control our weight. Food gives us energy to do our daily activities. Food helps us to grow and repair our body if we are ill…
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How mixtures are separated
EduBook Organización
- 1859 visitas
Evaporation. During evaporation, the liquid evaporates and the solid crystallises. Salt is separated from seawater at a salt factory using this method. Filtration. In filtration, the mixture is poured…
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Complete. The anomalous expansion of water
EduBook Organización
- 1816 visitas
Complete the text on the anomalous expansion of water: density – increase – expands – freezes – water– float – volume Almost all substances in size when they get hot and when they cool.…
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The geosphere
EduBook Organización
- 1813 visitas
What is the geosphere made of? The geosphere is made up of rocks. Rocks are natural materials. They are usually hard and dense, and are made up of chemical substances called minerals. For example,…
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Minerals (I)
EduBook Organización
- 1692 visitas
2.1. What is a mineral? Minerals are solid and inorganic substances which have a particular chemical composition. They are formed naturally. Minerals are characterised by their perfectly ordered…
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True / false. Main characteristics of soil
EduBook Organización
- 1544 visitas
Are these sentences true or false? Soil contains tiny fragments of rocks, minerals and the decomposed remains of plants and animals. The decomposed remains of plants and animals are called humus. Humus…
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