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Money
EduBook Organización
1902 visitas
Money in the form of coins had almost disappeared at the beginning of the Middle Ages. The coins' value depended on how much gold or silver they contained. When trade increased, money became more…
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Final evaluation 05 - The Middle Ages
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1907 visitas
Why were so many castles built during the Middle Ages?
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True/false. Viruses
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1906 visitas
Decide if the following statements are true or false: All viruses are microbes. ➝ All unicellular organisms are microbes. ➝ All viruses are unicellular organisms. ➝ Some microbes cause disease. ➝
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Answer. Arthropods
EduBook Organización
1901 visitas
Remember what you have studied in this section and answer the questions: What is a characteristic feature of arthropods? How many groups of animals are classified as arthropods? Which is the most…
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Look and answer. Gestation in animals
EduBook Organización
1907 visitas
Look at the table on the right and answer these questions. Which animal has the longest gestation? And the shortest? How does gestation relate to the number of young in a litter? And the number of…
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Chemical reactions
EduBook Organización
1905 visitas
What is a chemical reaction? Chemical reactions are processes that turn certain substances into other substances. These are the products of the reaction. Heat is sometimes a product of the reaction.…
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Answer. Heat
EduBook Organización
1913 visitas
Remember what you have studied in this section and answer the questions: What happens when an object heats up? And when it cools down? Why is it hotter in summer and colder in winter? Give two examples…
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Responsible energy consumption – we can all help
EduBook Organización
1902 visitas
We can all contribute to responsible energy consumption by: Consuming less electricity at home: switch off unnecessary lights, switch off the television when you leave the room, use low consumption home…
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Investiga. Especies de la fauna andaluza
EduBook Organización
1912 visitas
Elige, con un compañero o compañera, un animal de los citados en el apartado y, con ayuda de Internet o en una enciclopedia, buscad información. Luego, escribid un comentario acerca de las…
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Para saber más
EduBook Organización
1912 visitas
Durante el Paleolítico, los objetos se elaboraban tallando piedra, es decir, se golpeaba una piedra contra otra piedra más dura para darle la forma apropiada. En el Neolítico se aprendió a pulir la…
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