Energy Resources and Environmental Impact

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Questions and Answers

Which of the following energy resources can be naturally replaced?

  • Coal
  • Oil
  • Solar energy (correct)
  • Natural gas

What is the main disadvantage of using coal?

  • It produces high levels of energy.
  • It leads to global warming. (correct)
  • It is not readily available.
  • It is easy to distribute.

How is natural gas formed?

  • From wind erosion of rocks.
  • From marine animals and algae under high temperatures. (correct)
  • From the decomposition of terrestrial plants.
  • From solar energy conversion.

Which energy resource is classified as nonrenewable?

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

What environmental impact is associated with the use of hydropower?

<p>Disruption of ecosystems by dams (D)</p> Signup and view all the answers

What is a significant advantage of fossil fuels?

<p>They are readily available and easy to distribute. (D)</p> Signup and view all the answers

What type of energy is produced when coal is burned?

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

Which of the following can cause acid rain?

<p>Sulphur and nitrogen impurities in coal (C)</p> Signup and view all the answers

What is a significant advantage of nuclear energy?

<p>It generates a large amount of energy from a small amount of fuel. (C)</p> Signup and view all the answers

Which of the following is a disadvantage of geothermal energy?

<p>It has a limited choice of building sites. (D)</p> Signup and view all the answers

What is one significant disadvantage of solar energy?

<p>It is expensive to install and maintain. (A)</p> Signup and view all the answers

What are the three key components required for combustion to occur?

<p>Fuel, oxidizing agent, and heat. (D)</p> Signup and view all the answers

What is one disadvantage of hydropower?

<p>It can cause flooding and habitat destruction. (D)</p> Signup and view all the answers

Which phenomenon is primarily caused by the Moon's gravity?

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

What is a benefit of tidal energy?

<p>It does not require land space. (B)</p> Signup and view all the answers

What type of combustion occurs when fuel reaches ignition temperature without an external source?

<p>Spontaneous combustion. (B)</p> Signup and view all the answers

What is a disadvantage of wind energy?

<p>It can ruin the aesthetic of landscapes. (B)</p> Signup and view all the answers

What is a characteristic property of ignition temperature?

<p>It is always the same for specific materials. (C)</p> Signup and view all the answers

Which energy source is considered renewable and environmentally friendly?

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

Which of the following is an advantage of solar energy?

<p>It is renewable and harnesses the sun's energy. (B)</p> Signup and view all the answers

What is one of the visible signs of combustion?

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

How does passive heating work in homes?

<p>By positioning houses to maximize sunlight exposure. (D)</p> Signup and view all the answers

What is a common challenge associated with tidal power?

<p>It is difficult and expensive to install and maintain. (C)</p> Signup and view all the answers

What impact do tides have on the environment?

<p>They affect navigation and marine life. (C)</p> Signup and view all the answers

What is the neutron-to-proton ratio for heavier elements to remain stable?

<p>~1.5:1 (B)</p> Signup and view all the answers

Which of the following is considered a 'magic number' that increases nuclear stability?

<p>28 (D)</p> Signup and view all the answers

Which type of radiation has the lowest penetration power?

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

What process describes a large nucleus splitting into smaller nuclei?

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

What is the primary use of nuclear fusion?

<p>Energy production in the Sun (B)</p> Signup and view all the answers

Which type of radiation requires lead or concrete shielding due to its high penetration ability?

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

What technique uses radioactive decay of carbon-14 to determine the age of organic materials?

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

What is an essential characteristic of unstable nuclei?

<p>Imbalance of neutrons and protons (C)</p> Signup and view all the answers

What does oceanic circulation primarily refer to?

<p>Movement of water in oceans (C)</p> Signup and view all the answers

Which factor does NOT affect surface ocean currents?

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

What is the primary role of thermohaline circulation?

<p>Regulating global climate (B)</p> Signup and view all the answers

What type of air mass is characterized as dry and forms over land?

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

How does a cyclone typically affect weather?

<p>Causes rainy and windy weather (A)</p> Signup and view all the answers

Which statement about anticyclones is correct?

<p>They result in clear and calm weather (B)</p> Signup and view all the answers

What happens when two different air masses meet?

<p>Warm air rises over cold air (D)</p> Signup and view all the answers

What is the effect of the Coriolis effect on ocean currents?

<p>It causes currents to bend and swirl (B)</p> Signup and view all the answers

What is a primary by-product of nuclear fission?

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

Which type of energy generation has a higher energy yield?

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

Which air contaminant is primarily produced from incomplete combustion of fossil fuels?

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

What effect do weak prevailing winds have on air pollutants?

<p>Trap pollutants near the surface (B)</p> Signup and view all the answers

What is one of the health effects associated with Ozone at ground level?

<p>Irritates lungs and eyes (D)</p> Signup and view all the answers

Which air contaminant is known as a potent greenhouse gas emitted from agriculture?

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

What atmospheric condition can worsen air quality in cities like Los Angeles?

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

Which type of energy generation relies primarily on abundant hydrogen for fuel?

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

Flashcards

Oceanic Circulation

The movement of water in the oceans, both on the surface and deep below.

Air Mass

A large body of air with the same temperature, humidity, and pressure.

Cyclone

A low-pressure system where warm air rises. Brings cloudy, windy, and rainy weather.

Anticyclone

A high-pressure system where air sinks. Brings clear, calm, and sunny weather.

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Thermohaline Circulation

The process of cold, salty water sinking and warm, less salty water rising, creating a global current system.

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Coriolis Effect

The bending of currents due to the Earth's rotation.

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Formation of Clouds

Warm water rises and cools, releasing water vapor that condenses to form clouds.

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Condensation

The process of water vapor turning into liquid water, often forming clouds.

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Nonrenewable Energy

A type of energy that is available in limited quantities. It takes millions of years for these resources to form and therefore they cannot be replenished on a human timescale.

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Renewable Energy

A type of energy that is constantly being replenished by natural processes.

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Lithosphere Energy Resource

A resource that can be used to generate electricity. Examples include coal, oil, natural gas, nuclear energy, biomass, and geothermal energy.

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Hydrosphere Energy Resource

A resource that can be used to generate electricity. Examples include hydroelectric dams, tidal energy, and wave energy.

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Wind Energy

A resource that uses the power of the wind to generate electricity.

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Solar Energy

A resource that uses the power of the sun to generate electricity.

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Oil

A fuel formed from the remains of ancient marine organisms, like algae and small animals.

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Coal

A fuel formed from the remains of ancient plants and trees that were buried in swamps.

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What causes tides?

Tides are caused by the Moon's gravitational pull on Earth's water. When the water is directly under the Moon, it's high tide. When water is pulled away from areas between high tides, it's low tide.

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What is solar energy?

Solar energy is a sustainable and abundant source of clean energy. It can be captured through various technologies, powering everything from homes to large-scale industrial applications.

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What is Combustion?

A chemical reaction where fuel reacts with oxygen, releasing heat and light. This requires a fuel source, an oxidizing agent like oxygen, and an ignition temperature for the fuel to burn.

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What is nuclear stability?

The state of an atom's nucleus, indicating its tendency to undergo radioactive decay. A stable nucleus is unlikely to decay, while an unstable nucleus will decay, releasing energy.

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What is a passive heating system?

Passive heating systems use the sun's heat and light to warm homes. Houses are positioned to maximize exposure to sunlight during cold months. This helps reduce energy costs and reliance on traditional heating systems.

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What are photovoltaic cells?

Photovoltaic cells are used to convert sunlight into electricity. They are assembled into solar panels on rooftops or in large solar farms.

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What are solar collectors?

Solar collectors are large glass panels that absorb the sun's heat. This heat can be used to warm water or air for heating homes, swimming pools, or industrial processes.

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What are the types of combustion?

Rapid combustion is a quick and intense burning, like a log fire or a firecracker explosion. Slow combustion is a gradual process, like metal rusting. Spontaneous combustion occurs when a fuel reaches its ignition temperature without an external source of heat, such as a forest fire.

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Nuclear Stability

The ability of an atomic nucleus to remain stable and not spontaneously decay.

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Neutron-to-Proton Ratio (n/p ratio)

The ratio of neutrons to protons in an atomic nucleus. It plays a crucial role in determining stability.

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Strong Nuclear Force

A strong force that acts at very short distances within the nucleus, overcoming the repulsion between protons and holding the nucleus together.

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Magic Numbers

Specific numbers of protons or neutrons (2, 8, 20, 28, 50, 82, or 126) that lead to exceptionally stable nuclei due to their energy shell configurations.

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Radioactivity

The process by which unstable atomic nuclei release particles or energy to achieve stability.

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Gamma Rays (γ)

High-energy electromagnetic waves emitted during radioactive decay. They are highly penetrating and require lead or concrete shielding.

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Nuclear Fission

The splitting of a large nucleus into smaller nuclei, releasing a significant amount of energy. Used in nuclear power plants and atomic bombs.

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Nuclear Fusion

The fusion of small nuclei into a larger nucleus, releasing immense amounts of energy. Occurs in the Sun and experimental fusion reactors.

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What is nuclear energy?

Nuclear energy is a source of power gained by splitting atoms, mainly uranium or plutonium, to release energy.

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What is nuclear fission?

Nuclear energy is a source of power gained by splitting atoms, mainly uranium or plutonium, to release energy. This process is called nuclear fission.

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What are the benefits of nuclear energy?

Using nuclear energy is good because it produces very high-energy output from small amounts of fuel. Additionally, it reduces greenhouse gases.

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What are some drawbacks of nuclear energy?

The main concerns for using nuclear energy are its limited fuel supply, the high costs, and its potential for radioactive waste and accidents.

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What is geothermal energy?

Geothermal energy is a renewable energy source that leverages the Earth's internal heat for energy.

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What are the benefits of geothermal energy?

Geothermal energy is renewable, meaning it replenishes over time, and it's a relatively clean source of energy with minimal greenhouse gas emissions.

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What are the downsides of geothermal energy?

Geothermal energy is difficult to install and maintain since the equipment is underground. Moreover, its usage is restricted to areas with suitable geological conditions.

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What is hydropower?

Hydroelectric energy, also known as hydropower, utilizes the power of flowing water to generate electricity.

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What are the benefits of hydropower?

Hydroelectric energy is a renewable source of energy that generates electricity without greenhouse gas emissions.

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What are the downsides of hydropower?

Hydroelectric power plants require dams that can cause flooding, negatively affect wildlife habitats, and displace local communities.

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What is tidal energy?

Tidal energy uses the motion of tides, driven by moon's gravity, to generate electricity.

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What are the benefits of tidal energy?

Tidal energy provides a sustainable source of electricity, and it's typically less affected by weather fluctuations.

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What are the disadvantages of tidal energy?

The main drawbacks of tidal energy are high installation and maintenance costs, as well as the complex nature of harnessing the energy from the ocean.

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What is wind energy?

Wind energy harness the power of moving air to generate electricity.

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What are the benefits of wind energy?

Wind energy is a renewable source of energy that is environmentally friendly and produces no greenhouse gas emissions.

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What are the drawbacks of wind energy?

The main disadvantages of wind energy are the visual impact of wind turbines, the unpredictability of wind, and the inability to store the generated energy for later use.

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What are the benefits of solar energy?

Solar energy is a renewable source of energy that is environmentally friendly, and it's a sustainable source of electricity or heat.

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What are the drawbacks of solar energy?

The main drawbacks of solar energy are the large space required to build solar panels, the dependence on clear weather, and the cost of initial setup.

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Prevailing Winds

Large-scale wind patterns driven by the Earth's rotation and uneven solar heating.

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Particulate Matter (PM)

Tiny particles, like dust, soot, or smoke, that can harm human health and the environment.

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Carbon Monoxide (CO)

A colorless, odorless gas produced by the incomplete burning of fossil fuels, posing health risks.

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Sulfur Dioxide (SO2)

A colorless, acidic gas released from burning coal or oil, contributing to acid rain and respiratory problems.

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Nitrogen Oxides (NOx)

A group of gases, mainly nitrogen oxides (NOx), that contribute to smog and respiratory problems.

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Methane (CH4)

A potent greenhouse gas released from agriculture and waste, contributing to climate change.

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Study Notes

Energy Resources

  • Renewable energy can be replaced naturally (e.g., solar, wind, hydro).
  • Non-renewable energy takes millions of years to form (e.g., coal, oil, natural gas).

Technologies to Produce Electricity

  • Lithosphere: Oil drilling, natural gas, coal mining. Coal, natural gas are mined and transformed into electricity.
  • Hydrosphere: Water flow in dams powers turbines to produce electricity.
  • Atmosphere: Wind turbines and solar panels.

Oceanic Circulation

  • Refers to the movement of ocean water, both on the surface and below.
  • Factors affecting surface currents: wind, Earth's rotation (Coriolis effect), temperature, salinity, and density. Warm water rises, cold water sinks, and saltier water is heavier and sinks, and cold, salty water is denser and moves deeper.
  • Thermohaline circulation (Global Conveyor Belt): Moves warm water from the equator to the poles and cold water back to the equator.
  • Example: The Gulf Stream carries warm water to the east coast of North America, making winters less cold.

Air Masses

  • Types of Air Masses:
    • Continental (dry, forms over land).
    • Maritime (moist, forms over water).
    • Polar (cold, forms near the poles).
    • Tropical (warm, forms near the equator).
  • Formation of Clouds: Warm air rises over cold air when two different air masses meet.
  • Air masses with the same temperature, humidity, and pressure.

Cyclones and Anticyclones

  • Cyclone: A low-pressure system where warm air rises, bringing cloudy, windy, and rainy weather. Air moves towards the low-pressure center,counterclockwise in the Northern Hemisphere.
  • Anticyclone: A high-pressure system where air sinks, bringing clear, calm, and sunny weather. Air moves outward from the high-pressure center, clockwise in the Northern Hemisphere.

Combustion

  • Combustion: A chemical reaction where fuel reacts with oxygen to release heat and light; requires fuel, oxidizing agent, and ignition temperature.
  • Perceivable signs of combustion: flames, heat, light, smoke.

Fire Triangle

  • The three key factors necessary for combustion are fuel, oxygen, and heat. If any one of these is removed, the fire stops.
  • Fuel examples: solids (wood, paper), liquids (gasoline, alcohol), gases (natural gas, propane).
  • Oxidizing agent examples: air (oxygen), halogens, potassium nitrate.
  • Heat examples: the sun, sparks, friction, electrical energy

Rapid and Slow Combustion

  • Rapid combustion: log fires, explosions
  • Slow combustion: metal corrosion, rust.
  • Spontaneous combustion: fuel reaches ignition temperature without external heat source; forest fires

Nuclear Stability

  • Nuclear stability is the ability of an atomic nucleus to remain intact without decaying.
  • Stability depends on the neutron-to-proton ratio and the strong nuclear force.

Radioactive Decay

  • Unstable atomic nuclei release particles (alpha, beta, or neutrons) or energy (gamma rays) to become stable.
  • Alpha particles: low penetration.
  • Beta particles: moderate penetration.
  • Gamma rays: high penetration.

Nuclear Fission and Fusion

  • Fission: A large nucleus splits into smaller nuclei, releasing energy (used in power plants and atomic bombs).
  • Fusion: Small nuclei combine to form a larger nucleus, releasing immense energy (occurs in the Sun).

Atmospheric Circulation and Air Pollution

  • Prevailing winds (e.g., trade winds, westerlies, polar easterlies) affect pollutant dispersal.
  • Horizontal transport: Pollutants travel vast distances.
  • Vertical mixing: Strong upward winds dilute pollutants.
  • Local impacts: Weak winds trap pollutants, causing smog; temperature inversions (warm air trapping cooler air) worsen air quality.

Types of Air Contaminants

  • Particulate matter (PM): Tiny particles (dust, soot, smoke); respiratory and cardiovascular diseases.
  • Carbon monoxide (CO): Incomplete fossil fuel combustion; reduces oxygen in blood.
  • Sulfur dioxide (SO2): Burning coal/oil; acid rain.
  • Nitrogen oxides (NOx): Vehicle emissions; smog, respiratory problems.
  • Methane (CH4): Agriculture, waste; potent greenhouse gas.
  • Ozone (O3): Smog; lung irritation.

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