Environmental Science
Heat is energy in the process of being transferred from:

Cold objects to hot objects
High pressure to low pressure
Regions of low density toward regions of high density
Low pressure to high pressure
Hot objects to cold objects

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Environmental Science
A food web is

The tropic (feeding) levels that can be observed in an ecosystem
The set of prey species that are consumed by animals in an ecosystem
A set of interconnected food chains, illustrating the tropic relationships among species
Like a food chain

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