When heat<span> is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The </span>motion<span> and spacing of the </span>particles<span> determines the state of matter of the substance. The end result of increased molecular </span>motion<span> is that the object expands and takes up more space.</span>
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This can happen if the producer is large in size, or the primary consumers are small in size.
Example is where the producer of a food chain is a type of tree, and the primary producer is a type of insect. Clearly, an insect cannot consume the whole tree by itself, therefore, one tree can provide energy for a lot of insects, thus the number of producer is much lower than those of the primary consumers.
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