Gr7 - Renewable Energy Quiz

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Questions and Answers

What is potential energy?

Energy from the sun

Energy associated with motion

Energy used in electrical devices

Energy stored in an object due to its position or state (correct)

What is kinetic energy?

Energy stored in an object due to its position or state

Energy used in electrical devices

Energy associated with motion (correct)

Energy from the sun

What type of energy can be changed to allow you to see?

Electrical energy (correct)

Solar energy

Potential energy

Kinetic energy

What type of energy can be changed to enable you to feel?

Kinetic energy Signup and view all the answers

What type of energy can be changed so that you can hear?

Sound energy Signup and view all the answers

Name three uses of electrical energy in your house.

Refrigeration, lighting, and electronic devices Signup and view all the answers

What is an energy system?

A system that stores and releases energy Signup and view all the answers

What is the definition of potential energy?

Energy that is stored in a system Signup and view all the answers

Which of the following is an example of potential energy?

A book balanced on the edge of a table Signup and view all the answers

What gives an object gravitational potential energy?

Its position above the ground Signup and view all the answers

How do electrical cells produce an electric current?

By reacting chemicals to produce electrical energy Signup and view all the answers

Where does the energy in petroleum fuel come from?

Ancient sunlight Signup and view all the answers

What is the main source of energy used by the human body?

Carbohydrates Signup and view all the answers

What is the unit of measurement for energy?

Joule Signup and view all the answers

What is the standard unit of measurement of energy?

Joule Signup and view all the answers

What is the definition of kinetic energy?

Energy which causes a change or movement Signup and view all the answers

Which renewable energy source is mentioned as being expensive to set up and less efficient on cloudy days?

Solar energy Signup and view all the answers

What is the largest hydro power scheme in South Africa mentioned in the text?

Drakensburg Pumped Storage Scheme Signup and view all the answers

What is a disadvantage of using wind turbines as a renewable energy source?

They can be noisy and pose a threat to birds Signup and view all the answers

Which renewable energy source is mentioned as being produced from certain plants and can lead to deforestation and habitat loss?

Biofuels Signup and view all the answers

What is a potential consequence of uncontrolled wood gathering for fuel?

Deforestation and greenhouse gas emissions Signup and view all the answers

Which type of energy source is mentioned as non-renewable and producing harmful greenhouse gases and pollution?

Fossil fuels and nuclear fuels Signup and view all the answers

What is a defining characteristic of renewable energy sources mentioned in the text?

They can be continuously replaced and are environmentally friendly Signup and view all the answers

What is a non-renewable source of energy?

Coal Signup and view all the answers

Why are coal and oil considered to be non-renewable sources of energy?

They are formed from dead plants and animals over millions of years Signup and view all the answers

What is nuclear fission?

The process of splitting the nucleus of an atom Signup and view all the answers

Which of the following is an advantage of coal as a source of energy?

Relatively cheap Signup and view all the answers

What is a disadvantage of natural gas as a source of energy?

Highly toxic contaminated water from fracking Signup and view all the answers

Which of the following is a disadvantage of nuclear power?

Production of harmful radioactive waste Signup and view all the answers

Which of the following is a renewable energy source?

Hydropower Signup and view all the answers

Which of the following is a disadvantage of nuclear power mentioned in the text?

Production of radioactive waste Signup and view all the answers

What environmental issue is associated with natural gas extraction through fracking?

Water contamination Signup and view all the answers

What is the primary reason for opposition to fracking in South Africa's Karoo region?

Water scarcity Signup and view all the answers

Which renewable energy source utilizes water stored in dams to generate electricity?

Hydropower Signup and view all the answers

What is the main reason for the government seeking alternative energy sources, as mentioned in the text?

Significant environmental harm from fossil fuel consumption Signup and view all the answers

What is a defining characteristic of renewable energy sources, as mentioned in the text?

They can be reused and are sustainable Signup and view all the answers

What is a major environmental concern associated with the reliance on coal for electricity generation in South Africa?

Significant greenhouse gas emissions Signup and view all the answers

Study Notes

Renewable Energy Sources and Their Advantages and Disadvantages

Hydroelectric power is generated by using water to turn turbines, and it is renewable and environmentally friendly, but dams disrupt the natural flow of rivers.
South Africa has several hydro power schemes, with the largest being the Drakensburg Pumped Storage Scheme using water from the Thukela River.
Wind turbines use wind energy to produce electricity and are renewable, but they can be noisy, spoil landscapes, and pose a threat to birds.
Solar energy is collected using photovoltaic cells and is environmentally friendly and renewable, but it is expensive to set up and less efficient on cloudy days.
Biofuels, produced from certain plants, are renewable but can lead to deforestation and habitat loss, and require engine conversion for vehicles.
Wood, used as a fuel by low-income families, is renewable if trees are replaced, but uncontrolled wood gathering can lead to deforestation and greenhouse gas emissions.
Non-renewable energy sources include fossil fuels like coal and natural gas, and nuclear fuels like uranium, which produce harmful greenhouse gases and pollution.
Renewable energy sources, such as water, wind, sun, and biofuels, can be continuously replaced and are environmentally friendly.
The use of wood as a fuel can lead to greenhouse gas emissions and deforestation when not gathered sustainably.
Energy is needed to make things work, and there are two types of energy sources: non-renewable and renewable, each with their own advantages and disadvantages.
Fossil fuels and nuclear fuels are non-renewable sources of energy that produce harmful greenhouse gases and pollution.
Most renewable sources of energy, such as water, wind, sun, and biofuels, are environmentally friendly and can be continuously replaced.

Non-Renewable and Renewable Sources of Energy

Non-renewable sources of energy are those that cannot be replaced once used, such as fossil fuels like oil, coal, and natural gas.
Fossil fuels were formed millions of years ago from dead plants and animals and are extracted from the earth.
South Africa heavily relies on coal for electricity generation and liquid fuels, but this has resulted in significant greenhouse gas emissions.
Oil and natural gas, also fossil fuels, pose similar environmental and pollution issues, and natural gas extraction through fracking is particularly destructive and contaminates water.
Nuclear power, while a clean energy source, produces radioactive waste and poses safety concerns from the risk of nuclear meltdown.
Advantages and disadvantages of coal, oil, natural gas, and nuclear power as energy sources should be considered in a table format.
Overseas oil companies are lobbying for fracking in South Africa's Karoo, leading to opposition due to water scarcity in the region.
Renewable energy sources, such as hydropower, wind, sunlight, and biofuel, can be reused and are sustainable.
Hydropower, also known as hydroelectricity, utilizes water stored in dams to generate electricity.
South Africa has a nuclear power plant at Koeberg, but nuclear power has not fully lived up to its early promise of replacing fossil fuels.
Fossil fuel consumption has led to significant environmental harm, and the government is seeking alternative energy sources.
The text emphasizes the need to understand the issues surrounding fracking and encourages research and consideration of renewable energy sources.

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Description

Test your knowledge of renewable energy sources and their advantages and disadvantages with this informative quiz. Explore the benefits and drawbacks of hydroelectric power, wind turbines, solar energy, biofuels, and wood as fuel, as well as the environmental impact of non-renewable energy sources.