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Think about it. The natural environment
EduBook Organización
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Remember what you have studied in this section and answer the questions: Why does water exist in a liquid state on Earth but not on other planets? What functions does water have for living things?…
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Observe. The periodic table and chemical formulas
EduBook Organización
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Look at the photos and answer the questions: Look at figures 1-3. Say which elements are present in each compound and how many atoms there are of each. Which of these compounds is used as fuel?
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Look at some illustrations. Matter and its properties
EduBook Organización
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Look at these illustrations of molecules and write down in your notebook which are: chemical elements, chemical compounds.
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True/False. Polluting substances
EduBook Organización
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Answer true or false: Thermal power plants, vehicles and heaters expel pollutants into rivers. Secondary pollutants are formed from primary and other substances. Acid rain is a result of the formation…
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Analyse. A text
EduBook Organización
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Analyse a text: Sound and noise Spain is the second noisiest country in the world after Japan. Especially in big cities, people live surrounded by noise from traffic and construction work. This…
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Final evaluation T01 10 - The 18th century: the Ancien Régime in crisis
EduBook Organización
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To what extent did the economic reforms of King Charles III improve the social and economic situation in Spain?
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Choose. A stratified society
EduBook Organización
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Match the following definitions with the correct society or social group: Society of the Ancien Régime in which social position was established by birth. New social system adopted during the industrial…
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¿De dónde viene el miedo de los niños?
Mundo Primaria Organización
- 2896 visitas
El miedo en los niños es algo común y puede llegar a suponer un problema. ¿A qué se debe realmente que los niños tengan terrores nocturnos?
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Figuras semejantes. Actividad 3
EduBook Organización
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Razona por qué dos polígonos regulares de igual número de lados son semejantes. Dos polígonos regulares de igual número de lados son semejantes si los correspondientes son y los correspondientes son .
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Autoevaluación 8 - Proporcionalidad geométrica
EduBook Organización
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En un dibujo a escala 100 000 000:1 el diámetro de una bacteria es de 2,5 mm. ¿Cuál es el diámetro real de la bacteria? El diámetro real de la bacteria es de ·10 mm.