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Answer. The reproductive system
EduBook Organización
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Remember what you have studied in this section and answer the questions: What are the two main functions of the female reproductive system? Which organs make up this system? What are the two main…
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What is sound?
Maria Pallarés Docente
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What is sound? Sound is a form of energy, just like electricity and light. Sound is made when air molecules vibrate and move in a pattern called waves, or sound waves. Think of when you clap your hands,…
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Reflect. Prepare for a trip
EduBook Organización
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Imagine that next summer you are taking a long holiday to visit these places: Iquitos (Peru), Auckland (New Zealand) and Crete (Greece): Make a list of essential items that you will need in each place.…
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Urban activities: artisan workshops and trade
EduBook Organización
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2.1. Guilds Medieval cities became production centres of artisan products. Artisans that made the same products lived on the same street, which was named after them (tanners, weavers, etc.). Artisans…
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Think about it. Energy transfer
EduBook Organización
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Remember what you have studied in this section and answer the questions: Which has more internal energy: a hot body or a cold body? Explain why. With a classmate, discuss why we can start a fire if we…
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True / false. The continental landscape
EduBook Organización
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Which of these statements about the continental landscape are true or false?: The abundance of coniferous forest is thanks to the abundance of rainfall. Temperatures are high because of the distance…
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Complete. Atmospheric conditions
EduBook Organización
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Choose the best word to complete the following sentences: is the weight of the air on the planet's surface. Atmospheric pressure depends on and . Warm air weighs less and is less dense, which makes…
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Restriction Digestion and Gel Electrophoresis of DNA
Tiching explorer Organización
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In sub-cloning biochemists take a gene from a genome and paste it into a plasmid for use in the lab. Restriction endonucleases are used to cut DNA at specific sequences. Electrophoresis is a process in…
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Self-evaluation 3 - The Earth's relief
EduBook Organización
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Which concepts do the following definitions refer to?: The part of a volcano made of the materials it expels. Strong tremors originating inside the Earth that can cause the crust to rupture. An…
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Unit 14: The world today
EduBook Organización
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Armed conflict (n): fighting between armies in which weapons are used; known as war. Arab Spring (n): a series of demonstrations, protests, riots and civil wars which occurred in several Arab countries…
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