EVERYDAY SCIENCE

Detailed explanation-1: -The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants.

Detailed explanation-2: -Energy enters most ecosystems as sunlight, but the rest enters the ecosystem through producers!

Detailed explanation-3: -The bottom and largest level of the pyramid is the producers and contains the largest amount of energy. As you move up the pyramid, through the trophic levels to primary, secondary and tertiary consumers, the amount of energy decreases and the levels become smaller.

Detailed explanation-4: -The correct answer is (c) energy flows in only one direction through an ecosystem. Energy is captured from sunlight by plants, then passed on to the organisms that eat plants, then passed to the organisms that eat those organisms, and so on. The result is a linear, unidirectional flow of energy through an ecosystem.

Detailed explanation-5: -It radiates light and heat, or solar energy, which makes it possible for life to exist on Earth. Plants need sunlight to grow. Animals, including humans, need plants for food and the oxygen they produce. Without heat from the sun, Earth would freeze.