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Remember - Heat and temperature
EduBook Organización
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Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. Thermal energy is involved in many processes in our daily life, like cooking food, making a hot…
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Investigate - Heat and temperature
EduBook Organización
- 3714 visitas
Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. Thermal energy is involved in many processes in our daily life, like cooking food, making a hot…
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The Earth's oceans, seas, rivers and lakes
EduBook Organización
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2.1. Water on the earth's surface The Earth's largest oceans are the Pacific Ocean, the Atlantic Ocean and the Indian Ocean. The three oceans meet in the south to form the Antarctic Ocean. The…
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End-of-unit evaluation - Heat and temperature
EduBook Organización
- 3705 visitas
Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. Thermal energy is involved in many processes in our daily life, like cooking food, making a hot…
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Pure substances and mixtures
EduBook Organización
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4.1. Pure substances and mixtures Pure substances are substances made up of a single type of element or compound. Two examples of pure substances are iron and salt. A mixture is made up of different…
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Summaries - Society and the environment
EduBook Organización
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1. The Earth is an ecosystem The Earth is a complex ecosystem because it is made up of closely interrelated elements. These elements are: Lithosphere, or the Earth’s surface. Hydrosphere, or all of…
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Air and life
EduBook Organización
- 3653 visitas
We need air to breathe Humans and other animals that live on land need air to live. When we breathe, we take oxygen from the air. With this oxygen and with the food we eat, our body has the energy it…
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Pure substances: elements and compounds
EduBook Organización
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3.1. Pure substances and mixtures Pure substances are substances which have a fixed composition and properties which allow us to identify them. Mixtures are made up of two or more pure substances. 3.2.…
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Check. Test yourself
EduBook Organización
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Remember what you have studied in this unit and answer the questions: Are average velocity and instantaneous velocity the same? When? Why? What effects do forces produce? Give several examples of these…
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Renewable energy sources
EduBook Organización
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Energy sources that will not run out are called renewable energy sources. Some examples are the Sun, water and wind. The energy that we obtain from renewable sources is called clean energy because it…
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