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Activities - Energy
EduBook Organización
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We need energy to move. Humans get energy from food. Machines get energy from petrol or electricity. The Sun is a natural source of energy. We call the Sun a renewable energy source because it is…
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Introduction - Air and the atmosphere
EduBook Organización
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- 3690 visitas
Humans, plants and animals need air to breathe and live. Air is a mixture of gases. A layer of air covers the Earth and protects life on our planet. This layer of air is called the atmosphere. When air…
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Remember - Air and the atmosphere
EduBook Organización
- 3621 visitas
Humans, plants and animals need air to breathe and live. Air is a mixture of gases. A layer of air covers the Earth and protects life on our planet. This layer of air is called the atmosphere. When air…
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Find out more
EduBook Organización
- 2976 visitas
Energy can be converted from one form of energy to another. For example: Electrical energy is converted into heat energy by heaters and cookers, and into light energy by lamps. Electrical energy can…
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Introduction - Energy
EduBook Organización
- 2927 visitas
We need energy to move. Humans get energy from food. Machines get energy from petrol or electricity. The Sun is a natural source of energy. We call the Sun a renewable energy source because it is…
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We use machines
EduBook Organización
- 2919 visitas
Machines at home We use lots of different machines in our homes. Many of these machines need electricity. We call these machines electrical appliances. We use fridges to keep food cold so we can keep it…
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Answer. Human reproduction
EduBook Organización
- 2895 visitas
Remember what you have studied in this section and answer: What is a zygote? How is it formed? What is fertilisation? What route do sperm follow from when they leave the testicles to the moment they…
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The movements of the Earth and the seasons
EduBook Organización
- 2859 visitas
The planet Earth is round, like a ball. We call this shape a sphere. We use imaginary lines to study it. The Earth moves in two ways. It orbits (moves around) the Sun and it rotates on an imaginary line…
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Remember - Energy
EduBook Organización
- 2694 visitas
We need energy to move. Humans get energy from food. Machines get energy from petrol or electricity. The Sun is a natural source of energy. We call the Sun a renewable energy source because it is…
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