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Water purification and treatment
EduBook Organización
- 2950 visitas
Water goes through a series of stages both before and after it is used for consumption. Water collected from a river or lake is purified for human consumption. After human use, contaminated water and…
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Answer. Worms and molluscs
EduBook Organización
- 2919 visitas
Remember what you have studied in this section and answer the questions: What do worms look like? What protects a mollusc's body? What three groups are molluscs classified into? Some worms live in…
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Listening (KET) - Mrs Warren’s Problem
EduBook Organización
- 2652 visitas
Listen to the first part of Chapter One and choose the best answer. Where is Sherlock Holmes? Mrs Warren has a problem with What does Mrs Warren hear from the room? The lodger came to Mrs Warren's…
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Services and industry
EduBook Organización
- 2762 visitas
The service sector has not replaced the industrial sector, but the two sectors have become increasingly interdependent. For industry to remain competitive, it depends on an increasing variety and number…
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Answer. Properties of matter: mass, volume and density
EduBook Organización
- 2707 visitas
Remember what you have studied in this section and answer the questions: What is mass? What is volume? What is density? What is matter? What two physical properties does matter have? How many kilograms…
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Comprehension check (KET)
EduBook Organización
- 2531 visitas
Are these sentences “Right” or “Wrong”? If there is not enough information to answer “Right” or “Wrong”, choose “Doesn’t say”. Matthew Cuthbert is Mrs Lynde’s friend. Marilla…
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Answer. The fruit. The dispersal and germination of seeds
EduBook Organización
- 2595 visitas
Remember what you have studied in this section and answer the questions: What happens to the pistil as the seed develops? Give two examples of fleshy fruits and two examples of dry fruits. How many…
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Experiment. Electromagnet
EduBook Organización
- 2613 visitas
Wrap a piece of copper wire around a steel nail and connect it to a battery so that electrical current flows through the wire. You have made a simple electromagnet. You can use your electromagnet to…
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Think about it. Energy transfer
EduBook Organización
- 2587 visitas
Remember what you have studied in this section and answer the questions: Which has more internal energy: a hot body or a cold body? Explain why. With a classmate, discuss why we can start a fire if we…