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Matter and materials
EduBook Organización
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Artificial. We use natural materials to make artificial materials. Plastic is an artificial material. Mineral. Minerals are natural materials. We find them under the ground and in rocks. Material.…
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Summaries - The nervous system
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1. The nervous system The nervous system has two main parts: The central nervous system which consists of nervous centres which are all connected to each other: the cerebrum, the cerebellum, the brain…
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Investigate - Matter and its properties
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All the objects you can see around you are made up of matter. However, they are made up of different types of matter. These are called substances. Objects, which are made up of matter, can be physically…
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Plant groups. Mosses and ferns
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2.1. Plant groups Plants can be classified into two groups: Vascular plants. Plants which have vessels for transporting sap from the roots to the leaves and vice versa. Examples are ferns and…
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Answer. Cells
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Remember what you have studied in this section and answer the questions: What is a cell? What are living things made up of? How many cells are there in the human body? What are the three parts of a…
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Answer. Animal reproduction
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Remember what you have studied in this unit and answer: In which group of animals does the embryo develop inside the mother? In which group does it develop inside an egg? In which animals does it…
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Mr Craven’s Surprise
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When they go back home in the evening Colin’s doctor is waiting for him and Mary. ‘Don’t stay outside for a long time,’ says the doctor. ‘You must be careful, Colin, because you’re very…
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Comprehension check (PET) (II)
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Now correct the incorrect sentences. St John went to see Jane to tell her that Diana was ill. Jane didn’t agree that Mr Rochester was a bad man. Mr Briggs was looking for someone called Jane Eyre. St…
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Before you start - Heat and temperature
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Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. Thermal energy is involved in many processes in our daily life, like cooking food, making a hot…
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Unit 7: Society and the environment
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Acid rain (n): contaminated rain that damages vegetation, is harmful to animals and pollutes lakes and rivers. carbon dioxide (n): a gas found naturally in the Earth's atmosphere. Its increase due…