Energy in Systems

What is an ecosystem?

• It is the process in which plants and some other organisms use the energy in sunlight to make food.

• It is a community of animals, plants, and other organisms that interact not only with one another but also with the area they inhabit.

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Parts of an ecosystem

• Shelters and cars

• Boys and girls

• Biotic factors (living things) and abiotic factors (non living things).

• Technology and physical education

Biotic factor

• A car

• Rocks

• A cactus

• Water

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Abiotic Factor

• A tree

• Air

• A polar bear

• A girl

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What is energy?

• It is the sequence of transfers of matter and energy in the form of food from organism to organism.

• It is the ability to do work. It is how things change and move.

• It is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

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What is a system?

• It is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

• Things around us which do not breathe, move, grow, respond and reproduce are called as nonliving things.

• A group of parts that work together to function or perform a task.

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What is a food chain?

• It is the sequence of transfers of matter and energy in the form of food from organism to organism.

• It is the process in which plants and some other organisms use the energy in sunlight to make food.

• Things around us which do not breathe, move, grow, respond and reproduce are called as nonliving things.

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The initial source for all energy in a food chain is

• Plants

• The sun

• Fruits

• Herbivores

What kind of energy does an organism receive from eating food?

• Electrical

• Solar

• Chemical

• Mechanical

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What happens to energy within a system?

• It is increased

• It remains unchanged

• It changes form

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