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

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

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Environmental Science
The north-facing side of a hill in a mountainous region in the US tends to:

Receive less sunlight during a year than the south-facing side
All of these
Grow a variety of trees that are typically observed at higher elevation
Be a better location for a ski run than the south-facing side
Have snow on the ground for a longer period of time in winter compared to the south-facing side

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