Science (9th grade) Energy Part I
Kinetic Energy
Means moving. The kinetic energy of any moving ovject depends upon its mass and speed
The gravitational Potential Energy of an object is converted to the kinetic energy of motion as the object.....
falls
Hydrogen fuel cell
generates electricity by reacting hydrogen with oxygen
Renewable energy resources include:
hydroelectric, solar, geothermal, wind, biomass, and possibly in the future--nuclear fusion
Energy can be converted from...
one source to another
Energy resources can be conserved by....
reducing energy needs and by increasing the efficiency of energy use
The law of Conservation of energy
states that energy cannot be created or destroyed
Mechanical Energy
the energy associated with the motion and position of everyday things
Energy conversion
the process of changing energy from one form to another
Energy
Ability to do work. Work is a transfer of energy
Biomass energy
Chemical energy sored in living things
Hydroelectric Energy
Energy obtained from flowing water. As water flows down hill, it's gravitational postential energy is converted into kinetic energy. This kinetic energy can be used to turn ______________
Chemical Energy
Energy stored in chemical bonds
Electic Energy
Everngy associated with electric charges
Nonrenewable Energy Resources
Exist in limited quantities and, once used, cannot be replaced except over the course of millions of years
Energy Conservation
Finding ways to use less energy or to use energy more efficiently
Electromagnetic Energy
Form of energy that travels through space in the form of waves
Potential Energy
Gravitational potential energy--potential energy that depends upon an objects height. Potential energy=mgh
Fossil fuels
Oil, natural gas, and coal
Non Renewable Energy sources include:
Oil, natural gas, coal and uranium
Elastic Potential Energy
Potential energy that is stretched or compressed
Solar Energy
Sunlifht that is converted into usable energy. Passive solar designs use sunlight to heat a building without using any machinery. Inactive Energy system, sunlight heats _____________________ through which water flows
Nuclear Energy
The energy stored in atomic nuclei
Thermal Energy
The total potential and kinetic energy of all the microscopic particles in an object
Geothermal Energy
Thermal energy beneath the earth's surface