Solar power harnesses radiant light and heat from the sun which has been used by humans for ancient technologies. Geothermal energy is thermal energy generated in the Earth from radioactive decay, volcanic activity, and absorbed solar energy. Tidal power converts the energy of tides into electricity using structures like tidal barriers or turbines placed in tidal currents.

1. DOUBLE
CLICK

2. CLICK
HERE

5. CLICK
HERE

6. What is a type of energy that comes from the radiant
light and heat from the sun, has been harnessed by
humans since ancient times using a range of ever-evolving
technologies.
a. tidal power
b. solar power
c. geothermal energy
d. hydropower
next question please

7. CLICK
HERE

8. Back to question

9. What do we call a type of energy that is derived from
the force or energy of moving water, which may be
harnessed for useful purposes.
a. tidal power c. hydropower energy
b. geothermal energy d. wind energy
next question please

11. Back to question

12. What is a form of hydropower that converts the energy
of tides into electricity or other useful forms of power.
c. geothermal energy
a. solar energy
b. tidal energy d. wind energy
next question please

14. Back to question

15. What is a thermal energy generated and stored in the
Earth.
c. solar energy
a. geothermal energy
b. hydropower energy d. tidal energy
next question please

17. Back to question

18. What is a form of power that converts the energy of
the wind into electricity or other useful forms of
power.
c. geothermal energy
a. tidal energy
b. solar energy d. wind energy
Next please

19. CLICK
HERE

20. Back to question

26.  Alternative energy is an umbrella term that refers to any
source of usable energy intended to replace fuel sources
without the undesired consequences of the replaced
fuels.[1]
 The term "alternative" presupposes a set of undesirable
energy technologies against which "alternative energies"
are contrasted. As such, the list of energy technologies
excluded is an indicator of which problems the alternative
technologies are intended to address. Controversies
regarding dominant sources of energy and their
alternatives have a long history. The nature of what was
regarded alternative energy sources has changed
considerably over time, and today, because of the variety
of energy choices and differing goals of their advocates,
defining some energy types as "alternative" is highly
controversial.

27. Solar energy, radiant light and heat from the sun, has been
harnessed by humans since ancient times using a range of
ever-evolving technologies. Solar radiation, along with
secondary solar-powered resources such as wind and wave
power, hydroelectricity and biomass, account for most of the
available renewable energy on earth. Only a minuscule
fraction of the available solar energy is used.
Solar powered electrical generation relies on heat engines and
photovoltaics. Solar energy's uses are limited only by human
ingenuity. A partial list of solar applications includes space
heating and cooling through solar architecture, potable water
via distillation and disinfection, daylighting, solar hot water,
solar cooking, and high temperature process heat for industrial
purposes.To harvest the solar energy, the most common way
is to use solar panels.

28.  Geothermal energy is thermal energy generated and stored in the
Earth. Thermal energy is energy that determines the temperature of
matter. Earth's geothermal energy originates from the original
formation of the planet, from radioactive decay of minerals, from
volcanic activity, and from solar energy absorbed at the surface. The
geothermal gradient, which is the difference in temperature between
the core of the planet and its surface, drives a continuous conduction
of thermal energy in the form of heat from the core to the surface.
 From hot springs, geothermal energy has been used for bathing
since Paleolithic times and for space heating since ancient Roman
times, but it is now better known for electricity generation. Worldwide,
about 10,715 megawatts (MW) of geothermal power is online in 24
countries. An additional 28 gigawatts of direct geothermal heating
capacity is installed for district heating, space heating, spas,
industrial processes, desalination and agricultural applications.[1]

29. Tidal power, also called tidal energy, is a form of hydropower that
converts the energy of tides into electricity or other useful forms of
power. The first large-scale tidal power plant (the Rance Tidal Power
Station) started operation in 1966.
Although not yet widely used, tidal power has potential for future
electricity generation. Tides are more predictable than wind energy
and solar power. Among sources of renewable energy, tidal power
has traditionally suffered from relatively high cost and limited
availability of sites with sufficiently high tidal ranges or flow velocities,
thus constricting its total availability. However, many recent
technological developments and improvements, both in design (e.g.
dynamic tidal power, tidal lagoons) and turbine technology (e.g. new
axial turbines, crossflow turbines), indicate that the total availability of
tidal power may be much higher than previously assumed, and that
economic and environmental costs may be brought down to
competitive levels

30. Hydropower, hydraulic power or water power is power that is
derived from the force or energy of moving water, which may
be harnessed for useful purposes. Prior to the development of
electric power, hydropower was used for irrigation, and
operation of various machines, such as watermills, textile
machines, sawmills, dock cranes, and domestic lifts.
Another method used a trompe to produce compressed air from
falling water, which could then be used to power other
machinery at a distance from the water.
In hydrology, hydropower is manifested in the force of the water
on the riverbed and banks of a river. It is particularly powerful
when the river is in flood. The force of the water results in the
removal of sediment and other materials from the riverbed and
banks of the river, causing erosion and other alterations.

31. Wind power is the conversion of wind energy into a useful form
of energy, such as using wind turbines to make electricity, wind
mills for mechanical power, wind pumps for pumping water or
drainage, or sails to propel ships.
Large-scale wind farms are connected to the electric power
transmission network; smaller facilities are used to provide
electricity to isolated locations. Utility companies increasingly
buy back surplus electricity produced by small domestic
turbines. Wind energy, as an alternative to fossil fuels, is
plentiful, renewable, widely distributed, clean, and produces
no greenhouse gas emissions during operation. However, the
construction of wind farms is not universally welcomed
because of their visual impact but any effects on the
environment are generally among the least problematic of any
power source.