Term 4
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Questions and Answers

What is the main focus of Unit 1 regarding sustainable resource utilization?

  • Emphasizing the importance of passing a more preserved world to future generations (correct)
  • Encouraging excessive reliance on coal
  • Promoting the use of non-renewable energy sources
  • Advocating for increased resource consumption

Which types of resources are emphasized as sustainable options?

  • Gold and oil
  • Solar energy and wind power (correct)
  • Coal and natural gas
  • Water contamination and soil erosion

How have the resource bases of countries like the United States contributed to their economic development?

  • By facilitating higher standards of living (correct)
  • By advocating for exploitation of natural resources
  • By encouraging dependence on non-renewable energy sources
  • By depleting resources rapidly

What is a major concern related to resource exploitation?

<p>Resource depletion (D)</p> Signup and view all the answers

Why are renewable resources like wind and solar power considered sustainable?

<p>They need continuous replenishment (C)</p> Signup and view all the answers

How does the text suggest mitigating climate change and soil erosion?

<p>By reducing resource consumption and advocating renewable energy sources (D)</p> Signup and view all the answers

What property of soil describes how soil particles are aggregated, affecting water infiltration and root penetration?

<p>Structure (D)</p> Signup and view all the answers

What poses a challenge to soil quality and agricultural productivity by removing topsoil through natural forces?

<p>Wind and Water Erosion (A)</p> Signup and view all the answers

Which strategy involves implementing livestock limits to address soil erosion?

<p>Regulatory (C)</p> Signup and view all the answers

What is the primary source of electricity generation discussed in the text?

<p>Coal (C)</p> Signup and view all the answers

What environmental issue is associated with coal combustion by power plants?

<p>Air Pollution (B)</p> Signup and view all the answers

What is the most fertile layer of soil known as?

<p>A Horizon (D)</p> Signup and view all the answers

Which horizon of soil contains minerals leached from the A horizon and is less fertile?

<p>B Horizon (B)</p> Signup and view all the answers

What is the primary cause of resource depletion mentioned in the text?

<p>Population growth (D)</p> Signup and view all the answers

Which factor influences soil formation by dictating the mineral composition of soil?

<p>Parent Material (A)</p> Signup and view all the answers

What role does the O Horizon play in soil functionality?

<p>Composed of decaying plant matter transitioning into humus (B)</p> Signup and view all the answers

Which dimension is NOT included in the concept of sustainability mentioned in the text?

<p>Technological (C)</p> Signup and view all the answers

How does deforestation contribute to environmental problems according to the text?

<p>Exacerbates global warming through soil erosion and increased CO2 levels (D)</p> Signup and view all the answers

How many layers are typically found in a mature soil profile as described in the text?

<p>4 (B)</p> Signup and view all the answers

What makes the A Horizon distinct from other soil horizons?

<p>It is the most fertile layer rich in organic material. (C)</p> Signup and view all the answers

Which of the following activities aligns with sustainable practices as per the text?

<p>Recycling and organic farming (B)</p> Signup and view all the answers

What is the primary mechanism for converting solar power into electricity?

<p>Photovoltaics (A)</p> Signup and view all the answers

Which energy source is South Africa planning to increase to 14% in their energy mix by 2030?

<p>Hydroelectric power (D)</p> Signup and view all the answers

What major environmental issue is exacerbated by the clustering of power stations in Mpumalanga?

<p>Acid rain concentration (A)</p> Signup and view all the answers

Which project in South Africa is focused on developing wind power?

<p>Sere wind power (A)</p> Signup and view all the answers

What common element is used in the process of converting solar power into electricity?

<p>Silicon (D)</p> Signup and view all the answers

Which type of energy is not part of South Africa's 20-year plan for energy diversification by 2030?

<p>Biofuels (A)</p> Signup and view all the answers

What does the carbon footprint measure?

<p>Total greenhouse gas emissions caused directly and indirectly (C)</p> Signup and view all the answers

What does the primary footprint account for?

<p>Direct emissions from fossil fuel consumption (A)</p> Signup and view all the answers

Which approach is essential for ensuring a sustainable future for South Africa?

<p>Concerted efforts across government, business, and individual levels (D)</p> Signup and view all the answers

What is one of the goals of South Africa regarding its electricity supply?

<p>Increasing electricity supply sustainably (C)</p> Signup and view all the answers

What is highlighted as important in addressing contemporary global challenges?

<p>Green economies and sustainable living (A)</p> Signup and view all the answers

Which footprint encompasses indirect emissions associated with product lifecycles?

<p>Secondary footprint (A)</p> Signup and view all the answers

What is the main purpose of an 'artificial leaf' emulating photosynthesis?

<p>To convert sunlight into a chemical fuel (A)</p> Signup and view all the answers

Which renewable energy source in South Africa is expected to constitute a significant portion of new electricity generation?

<p>Solar power (C)</p> Signup and view all the answers

What is one of the key environmental concerns related to solar power in South Africa?

<p>Environmental impact during production, installation, and disposal (A)</p> Signup and view all the answers

How can South Africa address its dual electricity supply problem effectively?

<p>By promoting sustainable development and poverty reduction (B)</p> Signup and view all the answers

What does transitioning to a green economy in South Africa involve?

<p>Enhancing energy efficiency and promoting sustainable practices (C)</p> Signup and view all the answers

How can individuals contribute to environmental health according to the text?

<p>By adopting mindful consumption and sustainable living practices (D)</p> Signup and view all the answers

What role do governments play in promoting sustainability according to the text?

<p>Promoting environmental education and setting examples through sustainable practices (D)</p> Signup and view all the answers

'Underwater kites' are devices primarily used for:

<p>Generating energy in tidal currents (C)</p> Signup and view all the answers

'Solar buildings' involve innovations that integrate solar energy generation by using technologies such as:

<p>'Solar panel roof shingles' and 'spray-on thin film solar cells' (C)</p> Signup and view all the answers

What are the potential challenges faced by wind power according to the text?

<p>Noise and visual impact, opposition, potential harm to wildlife (A)</p> Signup and view all the answers

What is the main concern associated with resource exploitation according to the text?

<p>Resource depletion (B)</p> Signup and view all the answers

Why are renewable energy sources like wind and solar power considered sustainable?

<p>They have a limited impact on the environment (A)</p> Signup and view all the answers

What role do renewable resources play in resource sustainability?

<p>Enable continuous usage without depletion (A)</p> Signup and view all the answers

How do non-renewable resources differ from renewable resources?

<p>Renewable resources can be used continuously without depletion (C)</p> Signup and view all the answers

What is the essential characteristic of economic development associated with resource bases in countries like the United States and Britain?

<p>Higher living standards and quality of life (D)</p> Signup and view all the answers

Why is resource exploitation a concern in terms of depletion?

<p>Consumption surpasses replenishment rate (C)</p> Signup and view all the answers

What environmental challenges are posed by coal combustion in power plants?

<p>Smog, acid rain, and global warming (A)</p> Signup and view all the answers

Why is coal considered the most economical and energy-efficient source for electricity generation?

<p>It is abundant and cost-effective (D)</p> Signup and view all the answers

What is the primary consequence of coal mining on landscapes?

<p>Significant alteration of landscapes (D)</p> Signup and view all the answers

How does coal combustion contribute to air pollution?

<p>Through emissions leading to smog (D)</p> Signup and view all the answers

What key element is necessary in the process of converting solar power into electricity?

<p>Silicon (D)</p> Signup and view all the answers

Which action exacerbates soil erosion according to the text?

<p>Overgrazing and improper ploughing (A)</p> Signup and view all the answers

What is the primary impact of soil erosion on water bodies?

<p>Sedimentation in water bodies (D)</p> Signup and view all the answers

What factor restricts the placement of power stations in South Africa?

<p>Geographical limitations of coal fields (D)</p> Signup and view all the answers

What is a common risk associated with underground coal mining?

<p>Fatalities, injuries, and chronic health issues (B)</p> Signup and view all the answers

What poses a significant threat to ecosystems due to its production during coal mining?

<p>Sulfuric acid (C)</p> Signup and view all the answers

What is the primary goal in reducing the carbon footprint?

<p>Mitigating climate change (B)</p> Signup and view all the answers

Which footprint includes indirect emissions related to the lifecycle of products used?

<p>Secondary footprint (A)</p> Signup and view all the answers

What multifaceted approach is essential for ensuring a sustainable future for South Africa?

<p>Focusing on green economies (C)</p> Signup and view all the answers

How are the challenges of meeting South Africa's changing energy needs intertwined?

<p>With sustainable development and poverty reduction (D)</p> Signup and view all the answers

What is emphasized as important for increasing South Africa's electricity supply?

<p>Economic and environmental sustainability (B)</p> Signup and view all the answers

Why is reducing the carbon footprint important for environmental sustainability?

<p>To mitigate climate change (A)</p> Signup and view all the answers

What is the primary purpose of the Sere wind power and Upington solar power projects in South Africa?

<p>To reduce the country's reliance on coal for electricity generation (A)</p> Signup and view all the answers

Which renewable energy source has the potential to power the entire Earth for a year with just an hour of energy output?

<p>Solar energy (D)</p> Signup and view all the answers

What is the common element used in the process of converting solar power into electricity?

<p>Silicon (C)</p> Signup and view all the answers

What is the estimated annual energy consumption of humanity, which is significantly less than the energy potential from wind streams in the Earth's troposphere?

<p>$17$ terrawatts (D)</p> Signup and view all the answers

Which innovation for the future involves harnessing wind streams in the Earth's troposphere as a potential energy source?

<p>'High Altitude Wind Power' (A)</p> Signup and view all the answers

What is the main reason behind the debate surrounding biofuels' impact on commodity prices and affordability for the impoverished?

<p>Potential negative effects on agricultural land use (A)</p> Signup and view all the answers

What environmental issue is coal power particularly associated with due to its emissions?

<p>'Acid rain' formation (D)</p> Signup and view all the answers

What is the primary objective of South Africa's plan to diversify its energy mix by 2030?

<p>To achieve a balanced portfolio of various energy sources (C)</p> Signup and view all the answers

'Electricity Imports' from hydroelectric plants on the Congo and Zambezi rivers are seen as a potential solution for addressing what issue?

<p>'Electricity supply' challenges (D)</p> Signup and view all the answers

'Limited Hydroelectric Potential' in South Africa is primarily attributed to what geographical factor?

<p>Inadequate river flow for consistent power generation (C)</p> Signup and view all the answers

What percentage of all new electricity generation in South Africa is expected to come from renewable energy sources over the next two decades?

<p>42% (C)</p> Signup and view all the answers

Which country hosted the COP 17 conference in Durban, showcasing its commitment to addressing climate change globally?

<p>South Africa (D)</p> Signup and view all the answers

What is the main environmental concern related to solar power in South Africa during its operation?

<p>Visual impact (A)</p> Signup and view all the answers

What is a key challenge faced by wind power as mentioned in the text?

<p>Visual impacts (C)</p> Signup and view all the answers

What is one of the primary roles that governments play in promoting sustainability according to the text?

<p>Promoting environmental education (C)</p> Signup and view all the answers

Which layer of soil is described as containing minerals leached from above and being less fertile?

<p>B Horizon (C)</p> Signup and view all the answers

What is the primary focus of a green economy as defined by the United Nations?

<p>Minimizing environmental impact (C)</p> Signup and view all the answers

How can businesses contribute to sustainability according to the text?

<p>Adopting greener practices (B)</p> Signup and view all the answers

Which technological advancement emulates the photosynthesis process by transforming sunlight into chemical fuel?

<p>'Artificial Photosynthesis' (D)</p> Signup and view all the answers

What is the primary function of the O Horizon in soil functionality?

<p>Develops through the incorporation of water, air, and organic matter (B)</p> Signup and view all the answers

How does climate influence soil formation?

<p>Affects the rate of weathering and vegetation type (B)</p> Signup and view all the answers

Which factor plays a crucial role in enriching soil with organic matter and enhancing fertility?

<p>Presence of soil organisms like bacteria and earthworms (B)</p> Signup and view all the answers

In soil science, what does the B Horizon primarily consist of?

<p>Minerals leached from the A horizon (B)</p> Signup and view all the answers

What is one of the fundamental roles of soil organisms like bacteria and earthworms?

<p>Enriching soil with organic matter (humus) (D)</p> Signup and view all the answers

What distinguishes the A Horizon (Topsoil) from the other soil horizons?

<p>Most fertile layer rich in organic material (A)</p> Signup and view all the answers

Which environmental factor influences soil characteristics by affecting sunlight exposure and water runoff?

<p>Climate (C)</p> Signup and view all the answers

What is the primary concern when resource exploitation leads to depletion?

<p>Resources being consumed faster than they can be replenished (D)</p> Signup and view all the answers

Which factor contributes significantly to the economic development of countries like the United States and Germany?

<p>Vast resource bases facilitating higher living standards (C)</p> Signup and view all the answers

What is the distinction between renewable and non-renewable resources primarily based on?

<p>Their ability to regenerate or be sustained without depletion (C)</p> Signup and view all the answers

Which type of resources offer a sustainable option due to their ability to regenerate or be used continuously without depletion?

<p>Renewable resources like solar energy and wind power (D)</p> Signup and view all the answers

What is the backbone of any society, constituting both the natural environment and economic assets that a country possesses?

<p>Resources (A)</p> Signup and view all the answers

Why is it imperative to pass a more preserved world onto future generations according to the text?

<p>To mitigate climate change and soil erosion (D)</p> Signup and view all the answers

What does the carbon footprint measure?

<p>Greenhouse gas emissions from various sources (C)</p> Signup and view all the answers

What is the primary focus of reducing the carbon footprint?

<p>Promoting sustainable living (B)</p> Signup and view all the answers

Which approach is highlighted as essential for South Africa to meet its energy needs sustainably?

<p>Implementing renewable energy solutions (D)</p> Signup and view all the answers

What is the primary relationship between South Africa's energy needs and sustainable development?

<p>Meeting energy needs is linked to sustainable development goals (D)</p> Signup and view all the answers

What is the multifaceted approach deemed essential for a sustainable future for South Africa?

<p>Promoting green economies and sustainable living (B)</p> Signup and view all the answers

How are the goals of sustainable development and poverty reduction linked to South Africa's electricity supply?

<p>Sustainable development relies on electricity supply adequacy (B)</p> Signup and view all the answers

What critical dimensions does sustainability encompass according to the text?

<p>Social, environmental, and economic sustainability (C)</p> Signup and view all the answers

Which factor plays a crucial role in determining the mineral composition of soil?

<p>Parent Material (C)</p> Signup and view all the answers

What horizon of soil comprises weathered parent material and contributes minerals to the soil?

<p>B Horizon (Subsoil) (B)</p> Signup and view all the answers

Which physical property of soil indicates the conditions under which soil was formed?

<p>Color (B)</p> Signup and view all the answers

How do organisms contribute to enriching soil with organic matter and enhancing fertility?

<p>By adding organic matter (humus) to the soil (D)</p> Signup and view all the answers

What role does climate play in influencing soil formation according to the text?

<p>Affecting the rate of weathering and organic matter content (B)</p> Signup and view all the answers

What is the primary source of energy for electricity generation in South Africa?

<p>Coal (D)</p> Signup and view all the answers

What is the common element used in the process of converting solar power into electricity?

<p>Silicon (B)</p> Signup and view all the answers

Which renewable energy source has the most significant untapped potential for electricity generation globally?

<p>Solar power (B)</p> Signup and view all the answers

What type of energy generation is expected to persist in the near term in South Africa despite efforts to diversify?

<p>Coal-based (D)</p> Signup and view all the answers

What was the significant initiative undertaken by South Africa in November 2011 to promote renewable energy?

<p>Sere wind power and Upington solar power projects (B)</p> Signup and view all the answers

'High Altitude Wind Power' aims to harness energy potential from wind streams at what location?

<p>Earth's troposphere (A)</p> Signup and view all the answers

Which element, when exposed to significant sunlight, generates an electrical charge as part of the solar power conversion process?

<p>Silicon (A)</p> Signup and view all the answers

'Electricity Imports' from hydroelectric plants on the Congo and Zambezi rivers are a potential solution for addressing what issue in South Africa?

<p>Energy shortages (A)</p> Signup and view all the answers

'Biofuels' stir debate primarily due to concerns over their impact on what aspect?

<p>Commodity prices (D)</p> Signup and view all the answers

Which energy source forms the cornerstone of available non-conventional resources alongside solar radiation?

<p>Biomass (B)</p> Signup and view all the answers

How does coal combustion impact the environment?

<p>It contributes to air pollution and global warming. (A)</p> Signup and view all the answers

What are some disadvantages of coal-based electricity?

<p>Geographical limitations in siting power stations. (B)</p> Signup and view all the answers

What is the purpose of contour ploughing in soil conservation?

<p>Reducing wind and water erosion. (A)</p> Signup and view all the answers

Why is coal considered cost-effective for electricity generation?

<p>It is economical and energy-efficient compared to other sources. (A)</p> Signup and view all the answers

How does acid mine drainage affect ecosystems?

<p>It poses a threat by acidifying soils and water bodies. (A)</p> Signup and view all the answers

What is the main reason for considering soil as a non-renewable resource?

<p>Slow formation rate. (A)</p> Signup and view all the answers

Which factor primarily restricts the siting of coal-fired power stations?

<p>'Geographical Limitations'. (C)</p> Signup and view all the answers

How does coal mining affect landscapes?

<p>'Landscape Alteration' is significant. (D)</p> Signup and view all the answers

What primary environmental issue arises from poor farming practices?

<p>'Poor Farming Practices' exacerbate erosion. (B)</p> Signup and view all the answers

What is a key challenge posed by soil erosion accelerated by human activities?

<p>Decrease in agricultural productivity. (A)</p> Signup and view all the answers

Why is renewable energy considered crucial for mitigating global warming?

<p>It reduces the environmental impact of fossil fuels. (A)</p> Signup and view all the answers

What is a key challenge faced by wind power according to the text?

<p>Potential harm to wildlife (B)</p> Signup and view all the answers

What distinguishes a green economy according to the United Nations?

<p>Efficient resource use and low carbon emissions (A)</p> Signup and view all the answers

Why is South Africa aiming to shift towards cleaner electricity sources?

<p>To address poverty effectively (B)</p> Signup and view all the answers

What is highlighted as important in transitioning South Africa to a green economy?

<p>Investing in renewable energy sources (A)</p> Signup and view all the answers

How do individuals contribute to promoting environmental health according to the text?

<p>By reducing personal carbon footprints (D)</p> Signup and view all the answers

What is a primary responsibility of governments in promoting sustainability?

<p>Setting examples through sustainable practices (D)</p> Signup and view all the answers

'Solar Buildings' involve innovations that integrate solar energy generation using technologies such as:

<p>'Spray-on thin film solar cells' (A)</p> Signup and view all the answers

'Underwater Kites' are devices anchored to the seafloor that:

<p>'Navigate' in tidal currents to generate energy (A)</p> Signup and view all the answers

'Artificial Photosynthesis' involves creating an 'artificial leaf' for:

<p>'Transforming sunlight into a chemical fuel' (B)</p> Signup and view all the answers

Why is it crucial to reduce resource consumption according to the text?

<p>To prevent depletion of resources faster than they can regenerate (B)</p> Signup and view all the answers

What is the primary factor driving economic development in countries like the United States and Britain according to the text?

<p>Significant resource bases (D)</p> Signup and view all the answers

What is the main concern associated with resource exploitation according to the text?

<p>Depletion leading to a scarcity of resources (D)</p> Signup and view all the answers

Why are renewable resources like solar energy and wind power considered sustainable options?

<p>They offer continuous use without depletion (D)</p> Signup and view all the answers

What distinguishes renewable resources from non-renewable resources primarily?

<p>Ability to regenerate without depletion (D)</p> Signup and view all the answers

In what way do renewable resources contribute to sustainability according to the text?

<p>By offering continuous use without depletion (B)</p> Signup and view all the answers

What does the O Horizon of soil primarily consist of?

<p>Decaying plant matter transitioning into humus (C)</p> Signup and view all the answers

Which factor significantly influences soil formation and quality by dictating the type of underlying rock?

<p>Parent Material (B)</p> Signup and view all the answers

What physical property of soil can provide insights into the conditions under which the soil was formed?

<p>Colour (B)</p> Signup and view all the answers

What is the primary role of organisms like bacteria and earthworms in soil?

<p>Enrich the soil with organic matter (C)</p> Signup and view all the answers

In the context of soil erosion, what is influenced by factors such as sunlight exposure and water runoff?

<p>Soil characteristics (B)</p> Signup and view all the answers

How is soil impacted by the climate in terms of vegetation type and weathering rate?

<p>Climate affects vegetation type and rate of weathering (D)</p> Signup and view all the answers

What distinguishes the A Horizon (Topsoil) from the B Horizon (Subsoil) in terms of fertility?

<p>A Horizon is less fertile than B Horizon (C)</p> Signup and view all the answers

'Regolith' refers to what specific layer associated with the formation of soil?

<p>'O' horizon (B)</p> Signup and view all the answers

'Humus' is primarily associated with which horizon of mature soil profiles?

<p>'O' horizon (D)</p> Signup and view all the answers

'Topsoil' is characterized by being rich in what specific material compared to subsoil layers?

<p>'A' horizon organics (D)</p> Signup and view all the answers

What is the primary difference between the primary and secondary carbon footprint?

<p>Primary footprint includes direct emissions, while secondary footprint encompasses indirect emissions. (B)</p> Signup and view all the answers

How does South Africa plan to increase its electricity supply sustainably?

<p>Through a multifaceted approach involving government, business, and individual efforts. (A)</p> Signup and view all the answers

Why is reducing the carbon footprint important for climate change mitigation?

<p>To mitigate greenhouse gas emissions that contribute to climate change. (B)</p> Signup and view all the answers

What role do soil organisms like bacteria and earthworms play in soil fertility?

<p>Enhancing soil fertility by breaking down organic matter. (A)</p> Signup and view all the answers

Why is meeting energy needs in South Africa intertwined with sustainable development goals?

<p>To balance increased electricity supply with environmental and economic sustainability. (C)</p> Signup and view all the answers

What is the main focus of green economies as highlighted in the text?

<p>Balancing economic growth with environmental conservation. (C)</p> Signup and view all the answers

What is the primary environmental impact of coal combustion by power plants?

<p>Air pollution (A)</p> Signup and view all the answers

Which factor poses a threat to ecosystems due to its interaction with water in coal mining?

<p>Sulfuric acid (B)</p> Signup and view all the answers

What is a key challenge faced by wind power according to the text?

<p>Geographical limitations (D)</p> Signup and view all the answers

Which energy source is South Africa planning to increase to 14% in their energy mix by 2030?

<p>Renewable energy (C)</p> Signup and view all the answers

What is the primary concern when resource exploitation leads to depletion?

<p>Resource scarcity (C)</p> Signup and view all the answers

What is emphasized as important for increasing South Africa's electricity supply?

<p>Enhancement of wind power generation (C)</p> Signup and view all the answers

'Artificial Photosynthesis' involves creating an 'artificial leaf' for:

<p><strong>Solar energy conversion</strong> (D)</p> Signup and view all the answers

Which common element is found in coal combustion emissions?

<p>Sulfur (D)</p> Signup and view all the answers

What is a key feature of a green economy, according to the United Nations?

<p>Efficient resource use (B)</p> Signup and view all the answers

Why is opposition encountered by wind power despite being a clean energy source?

<p>Noise and visual impact (D)</p> Signup and view all the answers

What is a primary challenge faced by solar power in terms of environmental impact?

<p>Issues related to installation and disposal (A)</p> Signup and view all the answers

What is a crucial aspect of transitioning to a green economy in South Africa?

<p>Enhancing energy efficiency (B)</p> Signup and view all the answers

How can individuals contribute to environmental health based on the text?

<p>Reducing personal carbon footprints through mindful consumption (D)</p> Signup and view all the answers

Why is renewable energy crucial for mitigating global warming?

<p>Reduces carbon emissions (C)</p> Signup and view all the answers

What characterizes sustainable living according to the text?

<p>Reducing carbon footprint (D)</p> Signup and view all the answers

What is the process through which solar power is converted into electricity known as?

<p>Photovoltaics (A)</p> Signup and view all the answers

What is the energy potential from wind streams in the Earth's troposphere estimated at?

<p>Over 850 terrawatts (D)</p> Signup and view all the answers

What is the primary focus of South Africa's long-term energy plan for 2030?

<p>Diversify energy sources (C)</p> Signup and view all the answers

Which country embarked on a significant initiative by developing renewable energy projects in November 2011?

<p>South Africa (C)</p> Signup and view all the answers

What issue stirs debate over biofuels regarding their impact on commodity prices and affordability?

<p>Impact on commodity prices (B)</p> Signup and view all the answers

Which renewable energy source holds immense potential but is currently underutilized globally?

<p>Solar radiation (A)</p> Signup and view all the answers

What material generates an electrical charge when exposed to sunlight in the process of converting solar power into electricity?

<p>Silicon (B)</p> Signup and view all the answers

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