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