Sunlight fuels life on Earth. All life relies
directly or indirectly on acquiring the right
amount of sunlight to provide energy and
Plants use water, carbon dioxide, minerals
from the soil, and sunlight to store the
When they are eaten by herbivorous animals,
energy trapped in the plants is passed
through the life chain. When herbivorous
animals are eaten by carnivorous animals,
they continue through the food chain.
Omnivores like people get energy through
Energy can be defined as the capacity for
change. Living things need energy for
everything they do--growing, moving, working,
Solar power can provide a continuous,
nonpolluting source of electricity to heat, light
and power our homes and industries.
Even animals that do not use sunlight directly
for their metabolism are impacted by it.
Vitamin D is unique. It is the only vitamin that
can come from a non-food source. Vitamin D
is made by our bodies when exposed to
sunlight, as well as coming from fish, grains,
and milk products.
But not all of the effects of the sun are
beneficial to life. Sun rays also contain lethal
radiation. The magnetic field surrounding the
Earth deflects a lot of it, but some gets through.
To prevent skin cancer, it is important to use
sunblock, coverups, hats and/or sunglasses
when spending too much time in the sun, and
to remain inside as much as possible
between 10 a.m. and 2 p.m.