Hydroelectricity and tidal energy are similar because they are both sources of energy rely on water.
they both rely on water
hydroelectricity solar energy tidal power oil power wind power coal power nuclear power
Electicity from coal, oil, natural gas, nuclear, biomass, wind, solar, tidal sources.
Tidal energy is natural and is not harmful to the Earth. Scientists are currently studying ways to make use of tidal energy because of its many benefits.
If by alternative you mean "not fossil fuels" then the following:The kinetic energy of water (Hydroelectricity)The kinetic energy of wind (wind turbines)The rotational/tidal energy of the Earth/MoonDirect Sunlight (both heat and Photovoltaic).Geothermal energy.
Water can be converted into various forms of energy, including hydropower, thermal energy from heating water, and potential energy through elevation changes in hydroelectricity. It can also be used to generate kinetic energy in the form of wave or tidal power.
Tidal energy is only available on the coast. Some locations are better than others for tidal energy because of the tidal range - for example, the North West of Australia has a very large tidal range.Converting tidal energy to electrical energy may require the construction of channels or barrages which may impact on the environment.
Tidal energy is considered a renewable energy source because it relies on the predictable movement of tides, which are driven by the gravitational forces of the moon and sun. As long as the Earth has oceans and tides, tidal energy can be harnessed continuously.
Because tides are created every second.
Geothermal is taken from heat being made by the insides of the earth, usually in the form of hot springs and steam. Think Yellowstone. Tidal is taken from the changing of high tide to low tide and vise versa. It's a formal of hydroelectricity. Both of these are very "green" ways of harvesting energy unlike coal burning.
tidal energy is created by turbines that does make tidal power
Tidal power is useful because it generates electricity that is renewable, free and non-polluting. So it is an excellent replacement for energy from fossil fuels (coal, oil and natural gas) which is non-renewable, expensive and polluting (that is, causing global warming).