physics lesson 7 unit 6

Today wind power provides ___ of commercially created electricity in the US.

10%

Match the description with the type of energy that corresponds. kinetic energy of air movement drives a turbine

wind power

Number the following actions that occur when heat from sunlight is used to produce steam, which is then used to create electricity. (1-5 with 1 being the first step)

1. produce heat (to) 2.produce steam (which will) 3.power a turbine (which will) 4.drive a generator (which will) 5.produce electricity

Some solutions to the non-renewable resource problem are:

The best solutions seem to be found in these new or developing technologies: solar power wind power hydropower nuclear fusion

Match the description with the type of energy that corresponds. photovoltaic cells

There are two basic ways of using solar energy to create electricity: using thermal energy to operate mechanical systems, and photovoltaic cells. -solar energy

Today, the search continues for solutions to the environmental problems associated with the generation of electricity

What the world needs are renewable energy sources that do not pollute the planet.

Two non-renewable resources we are currently using for electricity are:

When coal, oil, natural gas, and radioactive materials are gone, they cannot be replaced.

How do photovoltaic cells work?

When light strikes the upper panel, electrons are moved into a higher energy state and flow from the material toward another panel which has a positive charge.

exajoule

an SI unit that is equal to 1018 joules

Define photovoltaic:

concerned with, or producing electric current or voltage caused by electromagnetic radiation, especially visible light from the sun

A problem with both wind power and solar power is that they are not ____________.

constant

hydropower

electric power generated through the harnessing of water power

hydroelectricity

electricity that is produced when the kinetic energy of falling water is converted into mechanical energy

Hot rock and hot water close to the earth's surface can be tapped to generate electricity through the process of _____.

geothermal electricity production.

Match the description with the type of energy that corresponds. falling water

hydro power

Match the description with the type of energy that corresponds. tidal motion

hydro power

A great advantage afforded by wind power, solar power and hydro-power is that they are all _____.

inexhaustible resources.

photovoltaic

of, concerned with, or producing electric current or voltage caused by electromagnetic radiation, especially visible light from the sun

In order to locate a wind-generating equipment, these may be considered disadvantages:

room for tall towers steady wind of 6.9 m/s or more vacant land where the noise of wind generators will not disturb resident

Match the description with the type of energy that corresponds. Sun's enormous amount of energy

solar power -The Sun has enormous amounts of energy, only a fraction hits us. Solar energy provides for changing thermal energy into mechanical energy for operation of machines.

Define hydroelectricity:

the kinetic energy of falling water drives a turbine which operates a generator to produce electricity

Match the description with the type of energy systems frequently used in locations where electrical devices are not connected to the energy grid.

wind and sola