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Remember - Obtaining and using energy
EduBook Organización
3538 visitas
Energy drives the Universe and is part of all the changes which take place on Earth. The Sun is our main source of energy. Without it, there would be no life and most other sources of energy would not…
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Investigate - Obtaining and using energy
EduBook Organización
3362 visitas
Energy drives the Universe and is part of all the changes which take place on Earth. The Sun is our main source of energy. Without it, there would be no life and most other sources of energy would not…
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Find out more. The Rif war in Morocco and the Tragic Week
EduBook Organización
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After losing the Spanish-American War in 1898, Spain sought out new territories in Africa. The Algeciras Conference (1906) established a Spanish-French territory in Morocco, with Spain controlling the…
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Light
EduBook Organización
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Why can we see objects? We can see objects because of light. It can come from natural sources such as the Sun or stars. It can also come from artificial sources such as candles and light bulbs. Light…
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Summaries - Energy
EduBook Organización
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1. Energy Energy is the power that causes change in things and allows us to carry out work. Energy is produced by energy sources. The main source of energy on Earth is the Sun. Energy exists in several…
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Sound
EduBook Organización
3162 visitas
6.1. What is sound? Sound is the propagation of vibrations and energy in a straight line and in all directions. It travels from the source of sound to the receptors. Unlike light, sound needs a material…
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Check. Women and the French Revolution
EduBook Organización
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Remember what you have studied in this section and answer the questions: Which social reforms introduced during the Revolution benefited women? Make a list of the social classes and professions of the…
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Unit 10: Obtaining and using energy
EduBook Organización
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Acid rain (n): rain which is acidic due to the presence of pollutants. balanced (adj): distributed evenly. biomass (n): organic matter used as a source of energy. blade (n): the arm which makes a wind…
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Overfishing
Laia Docente
2 lo usan

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Over three quarters of our planet are covered by the oceans. Their biodiversity is unmatched and they contain over 80 percent of all life on earth, mostly unexplored. Millions of people worldwide are…
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Heat and temperature
EduBook Organización
2783 visitas
What is heat? Heat makes an object hotter. It always travels from hot objects to cold objects. Sources of heat Sources of heat produce heat. There are artificial sources and natural sources. Some…
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