Aiden Gill, Heidi Foxford and, Dorothy Warren Solutions for Chapter: Energy, Exercise 1: Exercise 1
Aiden Gill Science Solutions for Exercise - Aiden Gill, Heidi Foxford and, Dorothy Warren Solutions for Chapter: Energy, Exercise 1: Exercise 1
Attempt the practice questions on Chapter 11: Energy, Exercise 1: Exercise 1 with hints and solutions to strengthen your understanding. Cambridge Lower Secondary Science Stage 9: Workbook solutions are prepared by Experienced Embibe Experts.
Questions from Aiden Gill, Heidi Foxford and, Dorothy Warren Solutions for Chapter: Energy, Exercise 1: Exercise 1 with Hints & Solutions
Hydrogen can be used to produce electricity.
Name the device in which hydrogen combines with another gas to produce electricity.
Hydrogen can be used to produce electricity.
What is the other gas that is combined with hydrogen to produce electricity?
Hydrogen can be used to produce electricity.
Explain why hydrogen is a renewable fuel.
Hydrogen can be used to produce electricity.
Explain why hydrogen must be stored very carefully.
The UK gets some of its energy from solar power.
Suggest why the UK meets more of its energy needs from solar power in the summer, compared to in the winter.
The UK gets some of its energy from solar power.
'A disadvantage of solar energy is that it is unreliable'. Explain what this statement means and why this is the case.
Switzerland is a country with many mountains but it is landlocked (surrounded by other countries).
Suggest and explain which methods could be used to generate electricity in Switzerland that use water. Why are other methods of electricity production that use water not appropriate?
Companies that extract coal from the ground have suggested a new technology, called 'clean coal', to reduce the harmful emissions from coal power stations. Read the article below from and answer the question that follows.
Coal provides per cent of the world's electricity. It is estimated that burning coal produces per cent of the total emissions of carbon dioxide gas across the world each year. Mined coal not only contains carbon, but also sulphur and nitrogen. 'Clean coal' technology is being developed to reduce the amount of solid carbon and the oxide gases of sulphur and nitrogen which are produced when coal is burned. It does not reduce the amount of carbon dioxide produced.
Burning coal can produce pollution. For example, in December , a thick layer of smog (a combination of smoke and fog) formed over London. It remained there for over three days before it started to clear. The smog contained gases including sulphur dioxide and nitrogen dioxide, as well as large amounts of floating, solid soot (carbon).
During , London had an outbreak of respiratory diseases including emphysema and asthma. Over people died from these diseases that year.
Use evidence from the article, as well as your own knowledge, to describe the possible advantages and disadvantages of developing 'clean coal' technology. Include comments on both human health and climate change.
