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Reproduction in mammals
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3.1. Reproduction in mammals Mammals reproduce by internal fertilisation. They are viviparous. Males have a penis that they use to introduce sperm into the female's body. Fertilisation then takes…
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Think about it. Coordination systems
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Remember what you have studied in this section and answer the questions: When you first learn to do something, you are very slow, but with practice you get faster. With a classmate and then your class,…
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Check. Metamorphic rocks
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Remember what you have studied in this section and answer the questions: How are metamorphic rocks formed? ➞ Metamorphic rocks are formed by... Where are metamorphic rocks formed? What characteristic…
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Summaries - Matter and its properties
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1. Matter Matter is anything which has mass and volume. For example, the Sun, the Earth, and human beings are all made up of matter. A physical system is any part of the Universe which is made up of…
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Disadvantages of non-renewable energies
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5.1. Pollution of the environment The production, transport and use of nonrenewable sources of energy generates environmental pollution. Power stations, factories, vehicles and heating systems all emit…
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Waves
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1.1. Vibratory motion If we hold one end of a sheet of steel and then move or hit the free end, the sheet will vibrate from one side to the other from its initial position (figure 1). We can compare…
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Unit 8: Matter and its properties
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Binary compound (n): a chemical compound which is made up of two elements. bind (v, past and past participle bound): to stick together or cause to stick together, for example through chemical bonding.…
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In recognition of the right to equality
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Have not all men violated the principle of equal rights by thoughtlessly depriving one half of the human race of the right to take part in the formation of laws, that is to say, by the exclusion of…
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True/false. The social and economic consequences of the war
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Are the following sentences about the economic and social consequences of the war true or false?: The war caused the deaths of around 10 million soldiers and left many more wounded and mutilated. The…
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Check. The Reformist Biennium (1931-1933)
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Remember what you have studied in this unit and answer the questions: Talk about Republican reforms. → Name one of the ... reforms and summarise its goal. Make a table to summarise the people and…
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