Answer:
Energy is the potential for causing changes. Energy helps organisms perform tasks; such as maintaining homeostasis and responding to stimuli. Energy is essential to life because it helps organisms perform essential activities for survival.
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Properties of solids: Properties of solids
(i) Solids have definite shape and distinct boundaries.
(ii) Solids have fixed volume.
(iii) They have negligible compressibility.
(iv) They are rigid (their shape cannot be changed).
(v) Their intermolecular force of attraction is maximum.
(vi) The kinetic energy of its particles is minimum.
Properties of liquids: Properties of liquids
(i) Liquids do not have definite shape and distinct boundaries.
(ii) Liquids have fixed volume.
(iii) They can be compressed.
(iv) They take up the shape of the container (they can change its shape).
(v) They are fluid and thus can flow like water.
(vi) Their intermolecular force of attraction is less than solids.
(vii)The kinetic energy of its particles is more than solids.
Properties of gas: Properties of gas
(i) Gases neither have definite shape nor have fixed volume.
(ii) They can be compressed much.
(iii) They can take any shape.
(iv) They are neither rigid nor fluids.
(v) Their intermolecular force of attraction is least.
(vi) The kinetic energy of its particles is maximum.
Flows of nutrients and energy
Flows of nutrients and energy link the producers, consumers, decomposers, and the abiotic environment in an ecosystem. Within an ecosystem, the producers obtain energy from the abiotic environment (sunlight). Consumers get nutrients and energy by feeding on other organisms. Decomposers get nutrients and energy by feeding on dead organisms or organic materials.
They are movement, homeostasis, and energy.
