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Atoms and molecules
EduBook Organización
- 1849 visitas
3.1. Atoms The smallest units of matter are called atoms. All substances are made up of atoms. Atoms contain three types of particles: protons, neutrons and electrons. Protons and neutrons are located…
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Inhaling and exhaling
EduBook Organización
- 1850 visitas
Air is renewed in the pulmonary alveoli of the lungs when we inhale and exhale. When we inhale, our lungs expand and when we exhale, our lungs contract. We use a large muscle called the diaphragm and…
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Observe. The skeletal-muscular system
EduBook Organización
- 1839 visitas
Look at the photos and answer the questions: Which parts of their bodies are these children using to move? Explain the movements that the athlete is making to throw the weight. What is the doctor using…
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Going beyond GDP
EducaMadrid Organización
- 2827 visitas
Does money buy happiness? Can wellbeing be measured? Does growth equal progress? These may sound like esoteric questions, but they are at the heart of efforts to move beyond GDP to develop more accurate…
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The propagation of heat
EduBook Organización
- 1806 visitas
Heat transfers from a hot object to a cold object by means of three mechanisms: conduction, convection and radiation. 6.1. Conduction Heat is transmitted through solid substances by conduction (figure…
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The modernisation of Spanish society
EduBook Organización
- 1790 visitas
4.1. Demography and migration The improvement in people's living conditions caused an increase in Spain's birth rate and a fall in the death rate, leading to a significant rise in population…
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Sabías que...
EduBook Organización
- 1784 visitas
A enerxía mareomotriz é a que provén das mareas. Aínda que non está moi explotada, a partir dela pódese obter electricidade. Para transformar esta enerxía en enerxía eléctrica, débese…
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Complete. Plants
EduBook Organización
- 1720 visitas
Complete the sentences by putting these words in the correct spaces: Spermatophytes move chlorophyll algae water ferns food photosynthesis The main groups of plants are , mosses, and spermatophytes.…
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Effects of heat on bodies (II)
EduBook Organización
- 1711 visitas
4.1. Expansion The term expansion refers to the increase in a substance's volume. This causes a reduction in the substance's density. The opposite effect is called contraction. The particles…
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Self-assessment T13 10 - Science and technology
EduBook Organización
- 1693 visitas
Complete these sentences with the correct words: We use the to move around the computer screen easily. A is a group of interconnected computers in which people share information and resources. The…
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