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End-of-unit evaluation - Living things
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There are a great variety of living things on the Earth. Some are microscopic and very simple, like bacteria, and others are very big and complex, like elephants. Even though they are different, all…
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Introduction - Living things
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There are a great variety of living things on the Earth. Some are microscopic and very simple, like bacteria, and others are very big and complex, like elephants. Even though they are different, all…
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Reading
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I was happy with the farmer and his family, and the days passed quickly. There were always a lot of visitors to the house. They came to see me. They were all interested in the little man that the farmer…
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Answer. The nervous system
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Answer these questions in your notebook: Which organs make up the central nervous system? What is the difference between the spinal cord and the spinal column? Which organs make up the brain? There are…
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Summaries - Matter and Materials
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1. The states of matter and their properties All things in nature are made of matter. Matter is made of different substances with different properties. Matter exists in three different forms or physical…
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Check. Test yourself
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Remember what you have studied in this unit and answer the questions: Why is it easy to compress a gas, but not a solid? What is the difference between chemical elements and chemical compounds? Are…
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Answer. Pre-Roman tribes: the Celts
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Remember what you have studied in this section and answer the questions: Who were the Celts? Where in the Iberian Peninsula did the Celts live? Where did they come from? What were Celtic villages…
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End-of-unit activities - The Animal Kingdom (II). Vertebrates
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There are around 50000 species of vertebrates, classified into five main groups: fish, amphibians, reptiles, birds and mammals. Fish are the most primitive group and they have the highest number of…
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Introduction - Energy
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We need energy to move. Humans get energy from food. Machines get energy from petrol or electricity. The Sun is a natural source of energy. We call the Sun a renewable energy source because it is…
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Reading
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Bill and Michelle woke up early on Sunday morning. This was a very important day for them and Nick. They left their house at half past nine and met Nick in the park. “Hi, Nick!” said Bill, looking…
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