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Tools and machines
EduBook Organización
- 2105 visitas
What is a tool? A tool is an instrument that we use to make our work easier. We operate tools using our hands. Humans used rocks, bones and sticks to make the first tools. These included axes, hammers…
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Complete. The anomalous expansion of water
EduBook Organización
- 2100 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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Effects of heat on bodies (II)
EduBook Organización
- 2085 visitas
4.1. Expansion The term expansion refers to the increase in a substance's volume. This causes a reduction in the substance's density. The opposite effect is called contraction. The particles…
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Respiration in plants
EduBook Organización
- 2055 visitas
How plants respire Like all living things, plants need energy to live. To obtain this energy, they absorb oxygen from the air and release carbon dioxide. This process is called respiration. Respiration…
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Understanding the text (KET)
EduBook Organización
- 2067 visitas
Are these sentences ‘Right’ or ‘Wrong’? If there is not enough information to answer ‘Right’ or ‘Wrong’, choose ‘Doesn’t say’. They can’t open the front door because they do not…
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Complete. Magnets
EduBook Organización
- 2041 visitas
Complete these sentences with the correct words: The force of attraction or repulsion of a magnet is strongest at the two . We call these two ends the . A magnet has two poles: a pole and apole. If we…
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Comprehension check
EduBook Organización
- 2062 visitas
Complete these sentences with a word. Number the events in the order you read about them in the story. Phileas Fogg became the of the ship they travelled in from New York. Phileas Fogg was taken to the…
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Tectonic plates
EduBook Organización
- 2038 visitas
The rocks that make up the geosphere are mainly solid, but they can change shape and move very slowly. These movements take place in the tectonic plates, which are on the outer surface of the geosphere.…
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