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Arthropods (I): characteristics
EduBook Organización
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4.1. Arthropods Arthropods are the most numerous and diverse group of invertebrates. They have adapted to all kinds of environments. The body of an arthropod has three parts: the head, thorax and…
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Think about it. Energy transfer
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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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Answer. Worms and molluscs
EduBook Organización
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Remember what you have studied in this section and answer the questions: What do worms look like? What protects a mollusc's body? What three groups are molluscs classified into? Some worms live in…
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Complete. Cellular respiration
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Complete this text with the correct words: lungs - cellular - bloodstream - carbon dioxide - energy - exhale - blood vessels - heart Blood containing oxygen passes from the to the . The heart pumps the…
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End-of-unit evaluation - Machines and structures
EduBook Organización
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In this unit we will look at electrical circuits, generators and motors that work by magnetism. We will also look at the machines and tools which help us do our work. Finally, we will look at…
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Summaries - Obtaining and using energy
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1. Forms of energy Energy is a property of matter which gives it the ability to produce change in its own physical and chemical properties and in those of other bodies... The main forms. of energy are:…
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End-of-unit activities - Machines and structures
EduBook Organización
- 2799 visitas
In this unit we will look at electrical circuits, generators and motors that work by magnetism. We will also look at the machines and tools which help us do our work. Finally, we will look at…
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Match. The formation of the USSR
EduBook Organización
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Match each definition with a concept: A federal state that brought together all the nationalities of the old Russian Empire. The highest authority (legislative power), elected by indirect universal…
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Introduction - Machines and structures
EduBook Organización
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In this unit we will look at electrical circuits, generators and motors that work by magnetism. We will also look at the machines and tools which help us do our work. Finally, we will look at…
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