the science of energy. what energy helps us do 1.make things move 2.make heat 3.make light 4.make...
TRANSCRIPT
What energy helps us do
1. Make things move2. Make heat3. Make light4. Make technology work (run electrical
devices)5. Make things grow
Chemical Energy
• Chemical energy is the energy stored in the bonds of atoms and molecules.
• Biomass• Petroleum• Natural gas• Propane• Coal
Nuclear Energy
• Nuclear energy is the energy stored in the nucleus of an atom.
• It is the energy that holds the nucleus together.
• The nucleus of a uranium atom is an example of nuclear energy.
Stored Mechanical Energy
• Energy stored in objects or substances by the application of force.
• Examples:– Compressed metal springs– Stretched rubber bands
Gravitational Energy• The energy of place or position
• Examples:– Water held in a reservoir behind a hydropower
dam – When the water in the reservoir is released to spin
the turbines, it becomes motion energy
Kinetic Energy• Kinetic energy is motion.• It is the motion of:
–Waves–Electrons–Atoms–Molecules–Substances
Radiant Energy
• Electromagentic energy that travels in tranverse waves.
• Radiant includes:– Visible light– X-rays– Gamma rays – Radio waves– Example: solar energy
Thermal Energy
• The internal energy in substances (heat)• It is vibration and movement of atoms and
molecules within substances.
• Example:– Geothermal energy
Sound
• The movement of energy through objects or substances in longitudinal (compression/rarefaction) waves.
Energy Flows• Where does the body get the energy to
shake a bottle?
•What type of energy produced the radiant energy from the sun?
•How is energy stored in food?
•All energy can be traced back to what type?
•If the source of energy must be burned, then how is it stored?
Look at the chart:
• Calculate the percentage of the nation’s energy use that each form of energy provides: