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Forces in everyday life. Equilibrium
EduBook Organización
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5.1. Motive force Motive force, Fm, is the force which makes an object move. For example, the force exerted by the engine of a plane which allows the plane to fly. 5.2. Friction Friction, Ffrict, is the…
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Changes in matter
EduBook Organización
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6.1. Changes in matter Matter is not immutable, as both the form it adopts and its composition can change. Physical changes A physical change takes place when the nature of matter is unchanged, this is…
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Direct and indirect speech
EduBook Organización
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Change the following sentences from indirect to direct speech. There is an example at the beginning. Dorian told Basil that he didn’t know what he was saying. ‘You don’t know what you’re saying,…
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Pure substances and mixtures
EduBook Organización
- 4280 visitas
4.1. Pure substances and mixtures Pure substances are substances made up of a single type of element or compound. Two examples of pure substances are iron and salt. A mixture is made up of different…
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Find out more
EduBook Organización
- 4163 visitas
Energy can be converted from one form of energy to another. For example: Electrical energy is converted into heat energy by heaters and cookers, and into light energy by lamps. Electrical energy can…
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Pure substances: elements and compounds
EduBook Organización
- 4171 visitas
3.1. Pure substances and mixtures Pure substances are substances which have a fixed composition and properties which allow us to identify them. Mixtures are made up of two or more pure substances. 3.2.…
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Analyse. Cell cultures
EduBook Organización
- 4121 visitas
Cell cultures Cell cultures consist of cultivating cells, both animal and plant, in the laboratory. We do this to obtain cell tissue. The tissues obtained from animal cells can repair or substitute…
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End-of-unit activities - Matter: Mass, Volume and Density
EduBook Organización
- 4038 visitas
All objects are made up of matter. As a consequence of this, they have mass, occupy a certain volume and have a certain density. Mass, volume and density are magnitudes. This means they have values…
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End-of-unit evaluation - Matter: Mass, Volume and Density
EduBook Organización
- 4036 visitas
All objects are made up of matter. As a consequence of this, they have mass, occupy a certain volume and have a certain density. Mass, volume and density are magnitudes. This means they have values…
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Listening - Childhood
EduBook Organización
- 3700 visitas
Listen to the first part of Part One. You will hear about Jane Eyre’s childhood. For each question, fill in the missing information. There is an example at the beginning. Jane Eyre’s Childhood…
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