chapter three of the technology book
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Energy | the ability to do work . can never be created or destroyed. gives the ability to do work; a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems
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| mechanical energy | energy that can be used directly to do work.
the sum of potential energy and kinetic energy present in the components of a mechanical system
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| Potential Energy | Stored energy. Energy that is capable of doing useful work if it was released. . potential energy is the energy which is possessed by the virtue of its position
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| kinetic Energy | moving energy. the energy possessed by a body by the virtue of its motion or movement
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| Chemical Energy | the energy set free in a chemical reaction. It is a form of potential energy and results from the making and breaking of chemical bonds.
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| Electrical Energy | energy of moving electric particles;
form of potential energy
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| Heat Energy | total kinetic energy of all the particles of a substance
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| Light Energy | energy given out by light sources;
only form of energy that you can see directly
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| Sound Energy | energy present in a sound wave, vibrations of the air molecules
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| Renewable Energy | source of the energy is still there after the energy is taken from it.
e.g.: wind, solar, hydroelectric
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| Non-Renewable Energy | source of the energy is gone after the energy is taken from it.
e.g: nuclear energy, fossil fuels
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| The Sun, our star | Most energy originally comes from this
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| Work | Energy allows this to be done.
i.e.: a forces through a distance
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| Electricity | convenient energy used at home
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| Watt | Unit of Power
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| Reservoir | Lots of water can be stored in this
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| Insulation | Reduces heat loss in a house
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| Nuclear Energy | Energy released by splitting atoms nucleus
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| Chemical Energy | type of energy stored in batteries
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| Potential energy | Energy with capacity to do work
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| Coal | a type of dark fossil fuel we burn
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| Motor | electrical energy changes to mechanical energy
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| Bulb | electrical energy changes to light and heat energy
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| Battery | chemical energy changes to electrical energy
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| Microphone | Sound energy changes to electrical energy
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| Speaker | electrical energy changes to sound energy
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| hair-dryer | electrical energy to heat, sound and kinetic energy
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| Bonfire | chemical energy to light, heat and sound energy
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| Dynamo | mechanical energy to electrical energy
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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