science

    Cards (19)

    • energy cannot be created or destroyed, only transferred from one form to another
    • mechanical work is a force moving an object through a distance
    • electrical work is the transfer of energy from one place to another by the use of electricity
    • radiation/waves are energy that are transferred as a wave
    • renewable energy is energy that can be replenished as it is used, such as solar and wind power
    • non renewable resource: a resource that cannot be replenished at the same rate as it is used
    • energy transfers happen when energy is transferred from one store to another store of energy
    • dissipation is the loss of energy from a system to its surroundings
    • conduction is the transfer of energy from one molecule to another by vibrations
    • convection is the transfer of heat by the movement of hot and cold air or water
    • thermal radiation is the transfer of energy from a hotter object to a cooler object without the transfer of matter
    • evaporation is the process of water turning into a gas and leaving the leaf
    • energy calculations: energy = mass x specific heat capacity x temperature change
    • atoms are tiny particles that make up all matter and are made up of protons, neutrons and electrons
    • protons have a positive charge
    • electrons have a negative charge
    • neutrons do not carry an electrical charge
    • the nucleus contains protons and neutrons
    • an atom has a neutral charge because it has equal numbers of protons and electrons
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