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10Fossil fuels like coal and petrol are formed from ancient plants and animals.
Hydroelectricity is a direct form of solar energy.
Wind energy is caused by the uneven heating of air by the sun.
Biofuels, charcoal, and fuelwood are products of solar energy.
Solar panels convert sunlight directly into heat energy.
Solar dryers reduce the risk of food contamination.
Photovoltaic cells are made mainly of copper.
Solar water heaters use evacuated tubes to heat water efficiently.
Solar cookers use concave mirrors to focus sunlight on food.
LED lamps in solar street lights glow only during the day.
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Which of the following is a product of solar energy?
Hydroelectricity is formed from:
Which energy source is formed by the decomposition of ancient biomass?
Wind energy is a result of:
Photovoltaic cells are used to:
Solar water heaters work on the principle of:
Solar cookers are designed to:
Which device reduces drying time and contamination of food?
In a solar street lamp, the LED lamp glows at night because:
The series combination of photovoltaic cells in a solar panel:
The ultimate source of energy on Earth is ______ sun.
Water energy obtained from rivers and reservoirs is an ______ form of solar energy.
Fossil fuels are formed from ______ plants and animals.
Wind energy is produced due to the ______ heating of air by the sun.
Solar panels convert ______ energy into electrical energy.
The main material used in photovoltaic cells is ______.
A solar dryer uses ______-painted surfaces to absorb heat.
Solar water heaters use ______ tubes to heat water.
Solar cookers use ______ mirrors to focus sunlight.
LED lamps in solar lamps glow using ______ stored in batteries