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The Earth, a Living Planet
EduBook Organización
- 8548 visitas
The existence of water and a protective atmosphere were key elements for the appearance of life on Earth. The first cells appeared 3.5 billion years ago. From these early forms of life, different groups…
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Asexual reproduction in plants
EduBook Organización
- 7325 visitas
2.1. Types of asexual reproduction Asexual reproduction is common in plants. New plants are mainly produced from stems, leaves or roots. The new plants are identical to the originals. This is because…
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Air and the atmosphere
EduBook Organización
- 6145 visitas
What is air? Air is a mixture of gases. It forms the atmosphere around us. Air is made up of two main gases: nitrogen and oxygen. It also has other gases, including water vapour and carbon dioxide.…
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Self-assessment T8 10 - Nutrition, breathing and circulation
EduBook Organización
- 5480 visitas
Are these sentences true or false? The urinary system consists of the kidneys and the ureters. The circulatory system transports nutrients to all the cells in our body. The kidneys extract water and…
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Test the properties of air
EduBook Organización
- 4723 visitas
What is air? Air is a mixture of gases. It forms the atmosphere around us. Air is made up of two main gases: nitrogen and oxygen. It also has other gases, including water vapour and carbon dioxide.…
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Before you start - Energy
EduBook Organización
- 1 lo usan
- 4492 visitas
Didactic objectives Define what energy is and recognise the main energy sources. Identify the main forms of energy. Describe how energy is converted from one form to another. Explain what renewable and…
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From zygote to birth
EduBook Organización
- 4433 visitas
After fertilisation, the zygote starts to divide and grow into an embryo. The embryo develops until it is ready to survive externally, and then it is born. Oviparous animals Animals that are born from…
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Summaries - Matter and Materials
EduBook Organización
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1. The states of matter and their properties All things in nature are made of matter. Matter is made of different substances with different properties. Matter exists in three different forms or physical…
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Complete a summary. Energy
EduBook Organización
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Complete the sentences with the correct words: temperature hot changes renewable volume cold Non-renewable heat energy sources artificial The most common forms of energy are electrical and . The Sun,…
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Our planet Earth
EduBook Organización
- 3938 visitas
Most of the Earth is made up of the geosphere. This is a large sphere of rock with a diameter of 13000 km. A large part of the geosphere is covered by the hydrosphere. This is a layer of liquid water…
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