What is the difference between passive and nonpassive income and loss?

I am filing my taxes, and have a schedule E to fill out, and it has a section about passive and nonpassive income and loss from my schedule k-1. I don’t know what the difference is between passive and nonpassive in this context.
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Active income is income from any of the following:
– wages, salary, commissions, bonuses, or other payments for services rendered
– profit from a trade or business in which the you are a material participant
– gain on the sale or other disposition of assets used in an active trade or business
– income from intangible property, if your personal efforts significantly contributed to the creation of the property.
Passive income is income from any of the following:
– Any trade or business or income-producing activity in which you did not materially participate,
– Subject to certain exceptions, all rental activities, whether you materially participate or not.
In general, if you receive income (or losses) from a business but aren’t an active participant in the business, it’s passive income.