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Remember - Matter and materials
EduBook Organización
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Everything around us is made of matter. Matter can be solid, like a table, liquid, like milk, or gas, like the air. All matter is made of different materials. Some things are made of wood, like a…
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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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Dhaka: fastest growing megacity in the world
Maria Pallarés Docente
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Video about Dhaka, the capital of Bangladesh. With its current population of 15 million people, Dhaka is the city with the highest population growth in the world. Between 1990 and 2005, the city doubled…
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Forces in everyday life. Equilibrium
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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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The nervous system
EduBook Organización
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The nervous system has two main parts: the central nervous system and the nerves. The central nervous system The central nervous system consists of four nervous centres which are all connected to each…
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From zygote to birth
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After fertilisation, the zygote starts to divide and grow into an embryo. The embryo develops until it is ready to survive externally, and then it is born. Oviparous animals Animals that are born from…
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Read a population pyramid - The Earth's Population
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A population pyramid is a graph that shows the structure of a population by age and gender. A population pyramid includes the following elements: Age groups. Each age group covers five years, beginning…
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Activities - The earth and the Moon
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We live on the planet Earth. The Earth has one satellite. It is called the Moon. The Earth and the Moon are part of the Solar System. The Solar System is made up of the Sun, the planets, satellites and…
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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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End-of-unit evaluation - The tertiary sector
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The tertiary sector is the largest economic sector in MEDCs. It includes a wide variety of services, such as healthcare, trade, transport and tourism. Trade (the buying and selling of goods) is an…
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