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Remember - The five senses
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We use our senses to find out information about the world around us. Human beings have five senses: touch, sight, hearing, taste and smell. We use different parts of our body for each sense. These body…
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Arthropods (I): characteristics
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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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End-of-unit evaluation - Nutrition, breathing and circulation
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Our body needs nutrients and oxygen to live and grow. We obtain nutrients from food, and oxygen from the air. In our body, the digestive system gives us the nutrients that we need, and the respiratory…
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Summaries - The skeletal-muscular system
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1. The skeleton The skeleton is made up of bones, joints and cartilage. The skeleton supports our body and gives it shape. It also helps us to move and it protects our internal organs. Our bones are the…
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Answer. Worms and molluscs
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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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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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The skeleton
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Our skeleton is made up of bones, joints and cartilage. The skeleton's main functions are: To support our body and give it shape. To help us to move, because our muscles are connected to our bones.…
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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
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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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