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Los géneros literarios
EduBook Organización
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La literatura en la edad media (II)
EduBook Organización
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The removal of cell waste
EduBook Organización
- 2112 visitas
4.1. What does excretion consist of? Cell activity produces waste products like carbon dioxide or urea. These substances are toxic for the organism if they accumulate. The function of excretion is…
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Analyse a text
EduBook Organización
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Pollen for human consumption Pollen is one of the many health foods or miracle foods that are sold as a food supplement for people with nutritional deficiencies. This plant-based product contains water,…
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Did you know?
EduBook Organización
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In a hermaphrodite animal, the same individual produces eggs and sperm. Cross-fertilisation usually takes place in these animals: two individuals mate and each one behaves like a male and a female at…
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Think about it. Reproduction in mammals
EduBook Organización
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Remember what you have studied in this section and answer the questions: What are the advantages of a) a long gestation period, and b) being born in the spring or summer? Describe the new-born offspring…
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Classify. Metals and non-metals
EduBook Organización
- 2109 visitas
Look at the diagram and answer the questions: Classify the elements in the table into metals and non-metals. Oxygen Nitrogen Chlorine Bromine Zinc Sulphur Sodium Iron Copper Gold Say what the physical…
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Write names and formulas. Matter and its properties
EduBook Organización
- 2107 visitas
Escribe las formulas correspondientes sin subíndice. Por ejemplo CO2 se escribe CO2. Remember what you have learnt about the formulas and names of binary compounds and do the following activities: Give…
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Match. Origins of heat
EduBook Organización
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Choose the correct answer: What other words do we use to describe heat? What is a heat source? How is the Sun a heat source? Why when we rub two sticks of wood together do we generate fire?
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Analyse. Learn to build and calibrate a thermometer
EduBook Organización
- 2110 visitas
To build a simple alcohol thermometer you can use a conical flask containing alcohol (mercury is toxic), and a capillary tube. Equipment A container to boil water, two beakers, ice cubes, a capillary…