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Stages in the germination of a seed
EduBook Organización
- 1943 visitas
Which organ becomes visible on the 4th day? Which organ is formed on the 6th day? At which point does the plant come to the surface? What day does this happen on? Why have the cotyledons reduced in size…
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Classify. Interaction in animals
EduBook Organización
- 1927 visitas
Indicate what type of stimulus is taking place in each case: physical or chemical. Sound: volume, pitch. Touch: pressure, intensity. Smell: different compounds, intensity. Vision: colour, shape,…
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Think about it. The responses of plants
EduBook Organización
- 1932 visitas
Remember what you have studied in this section and answer the questions: Discuss whether a plant would respond to light if the tips of the stem were cut off. Explain why poinsettias are typical…
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True or false. States of matter
EduBook Organización
- 1937 visitas
Answer true or false: The particles are less tightly bound together in a solid. The particles in a gas move very quickly. All systems are composed of material particles. Liquids are compressed and…
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Non-renewable sources of energy
EduBook Organización
- 1937 visitas
4.1. Coal Coal is a solid, black rock. It is the fossilised remains of huge masses of vegetation buried under the ground millions of years ago (figure 1). It is used mainly as fuel in coal-fired power…
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True/False. Waves and oscillations
EduBook Organización
- 1928 visitas
Answer true or false: Waves transport matter and energy. Electromagnetic waves do not need a natural medium to travel through. A wave is the transmission of an oscillatory or vibratory motion and of…
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Analyse. Symbols of liberal revolution
EduBook Organización
- 1934 visitas
Discuss the painting with a partner: What social groups appear? What does the figure of the woman represent? What do the people on the ground represent? What does the scene represent?
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Describe. Growth of urban population
EduBook Organización
- 1932 visitas
Describe the trend in population growth: 1851-1911.
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Unit 3: The industrialisation of european societies
EduBook Organización
- 1932 visitas
Anarchism (n): a doctrine saying that there should be no government and that people should work together. Bessemer's converter (n): a type of furnace, patented in 1855, used to convert pig iron into…
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The fall of Russia's Tsarist Empire
EduBook Organización
- 1939 visitas
5.1. The empire of the Tsars At the beginning of the 20th century, the Russian Empire had the following characteristics: It was an autocratic regime supported by a loyal bureaucracy, a powerful army and…