Energy Resources
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Questions and Answers

What type of energy is associated with the random motion of particles in a substance?

  • Kinetic Energy
  • Nuclear Energy
  • Thermal Energy (correct)
  • Chemical Energy

    • What is the source of energy for hydroelectric power?

  • Fossil fuels
  • Nuclear reactions
  • Geothermal energy
  • The sun's energy (correct)

    • What is the term for the transfer of energy through the flow of electric charge in an electrical circuit?

  • Mechanical Work
  • Radiant Energy Transfer
  • Heat Transfer
  • Electrical Work (correct)

    • What is the principle of energy conservation?

    <p>Energy is neither created nor destroyed, only converted</p> Signup and view all the answers

    What type of energy is stored in the bonds of chemical compounds?

    <p>Chemical Energy</p> Signup and view all the answers

    What is the term for the energy possessed by an object due to its motion?

    <p>Kinetic Energy</p> Signup and view all the answers

    What is the unit of power?

    <p>Joules per second</p> Signup and view all the answers

    What is the purpose of boilers, turbines, and generators in a power plant?

    <p>To generate electrical power</p> Signup and view all the answers

    What is the term for the energy stored in the nucleus of an atom?

    <p>Nuclear Energy</p> Signup and view all the answers

    What is the term for the transfer of thermal energy from a warmer object to a cooler one?

    <p>Heat Transfer</p> Signup and view all the answers

    How is energy transferred in a solar panel?

    <p>Through electromagnetic waves</p> Signup and view all the answers

    What is the term for the energy associated with the flow of electric charge?

    <p>Electrical Energy</p> Signup and view all the answers

    What type of energy is harnessed from the wind?

    <p>Kinetic energy</p> Signup and view all the answers

    What is the role of neutrons in an atom?

    <p>They have zero charge</p> Signup and view all the answers

    What is the term for the transfer of energy to or from an object by means of a force acting through a distance?

    <p>Mechanical Work</p> Signup and view all the answers

    What happens to an atom when it loses an electron?

    <p>It becomes a positively charged ion</p> Signup and view all the answers

    What is the unit of measurement for the flow of electricity?

    <p>Amps</p> Signup and view all the answers

    What happens to the whole circuit if a component breaks down in a series circuit?

    <p>The whole circuit breaks and current cannot pass through</p> Signup and view all the answers

    What is the purpose of a voltmeter in a circuit?

    <p>To measure the voltage</p> Signup and view all the answers

    What is the energy transferred to the components in a circuit called?

    <p>Potential difference</p> Signup and view all the answers

    How is the voltage distributed in a parallel circuit?

    <p>It is the same across all loops</p> Signup and view all the answers

    What is the difference between series and parallel circuits?

    <p>Series circuits have components connected one after the other, while parallel circuits have components connected in separate loops</p> Signup and view all the answers

    Why does ice float on water?

    <p>Because it is less dense than water</p> Signup and view all the answers

    What is the purpose of an ammeter in a circuit?

    <p>To measure the current</p> Signup and view all the answers

    Study Notes

    Energy Resources

    • Some sources of energy derive their energy from the sun, including:
      • Coal, formed from dead trees that have used energy from the sun to produce hydrocarbons that have become coal under pressure
      • Biofuels, organic matter that is burnt to produce energy
      • Hydroelectric energy, which relies on the sun's energy to run the water cycle
      • Wind energy, which is generated by the sun's heat causing air to rise and cooler air to flow in
      • Solar energy, which is captured by photocells and turned into energy

    Conservation of Energy

    • The principle of energy conservation states that energy is neither created nor destroyed, only transformed from one type to another
    • Energy can only be used by converting it from one form to another
    • Unless energy is added from the outside, a system always possesses the same quantity of energy

    Efficiency

    • Power is the work done per unit of time and energy transferred per unit of time
    • Power (P) = work done (W) / time (T)

    Chemistry

    Structure, Bonding, and Properties

    • The atomic mass is always bigger than the atomic number
    • Atomic number = proton number = electron number
    • Protons are positively charged particles, neutrons are neutral, and electrons are negatively charged particles
    • Atoms are neutral and become positive or negative ions when they lose or gain an electron
    • Electrons are arranged in shells, with 2 on the 1st shell, 8 on the 2nd shell, and so on

    Forces

    • Density is calculated using the formula: density = mass / volume
    • An object will float on a liquid if its density is less than that of the liquid
    • The density of water is 1.0 g/cm3
    • Ice is less dense than water, which is why it floats

    Electricity

    Currents in Series and Parallel Circuits

    • Current is the flow of electricity or the flow of charge
    • The unit of current is Amps
    • Ammeters are used to measure amps and are typically placed in series within a circuit
    • In a series circuit, if one component breaks down, the whole circuit breaks and current cannot pass through
    • In a parallel circuit, each component is on a separate loop, and if one component breaks down, it doesn't affect the other circuits

    Voltage in Series and Parallel Circuits

    • Voltmeters measure volts (V)
    • Volt is the energy transferred by the battery
    • Voltage is also called potential difference
    • In a series circuit, the voltage is spread out across components
    • In a parallel circuit, the voltage is the same across all loops

    Energy Stores and Transfers

    • Kinetic energy is the energy possessed by an object due to its motion

    • Potential energy is the energy stored in an object due to its position or configuration within a force field

    • Chemical energy is the energy stored in the bonds of chemical compounds

    • Nuclear energy is the energy stored in the nucleus of an atom

    • Thermal energy is the energy associated with the random motion of particles in a substance (also known as heat energy)

    • Electrical energy is the energy associated with the flow of electric charge

    • Energy transfer mechanisms include:

      • Mechanical work: transfer of energy through a force acting through a distance
      • Heat transfer: transfer of thermal energy from a warmer object to a cooler one
      • Electrical work: transfer of energy through the flow of electric charge in an electrical circuit
      • Radiant energy transfer: transfer of energy through electromagnetic waves, such as light or radio waves
      • Nuclear reactions: conversion of nuclear energy into other forms, such as kinetic or thermal energy, through processes like fission and fusion

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    Year 9 June Exams PDF

    Description

    This quiz covers various sources of energy, including coal, biofuels, hydroelectric power, and wind energy, highlighting their connection to the sun's energy.

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