Sunlight

In an ecosystem, plants use the sun's energy to make sugar.

About how much energy is passed on to each successive trophic level in an ecosystem? 10%

Although food chains begin with producers, they do NOT create energy. Instead, they change energy from one form to another. The sun is the ultimate source of energy.

Energy absorbed from sunlight is used to power the process of photosynthesis. Plants and some other organisms change carbon dioxide and water into sugars and oxygen during photosynthesis.

Only 10 percent of the energy pyramid can be used to show the amount of energy that moves from one level to the next.

What does the sun supply to an ecosystem? Energy

Plants use some of the sugar for food. The remaining sugar is stored in the cells of the plant.

When an organism eats a plant, the organism obtains the plants stored energy.

Vampire bats generally live in dark caves, hollows of trees, or attics of abandoned buildings. At night, they feed on the blood of other animals. What is the ultimate source of energy for vampire bats? Sunlight

Which set of organisms in this energy pyramid has the greatest amount of available energy? Zooplankton (see energy pyramid on pg 113)