Vocabulary (Nonfiction Texts, List 2)

To make something dangerous, dirty or impure by adding something harmful or undesirable to it.

to send (light, energy, scent, etc.) out from a source

capable of being slowly destroyed and broken down into very small parts by natural processes

to change (something) very much or completely

quite good, bad, etc. in comparison to other similar things or to what you expect

able to be accomplished; doable

showing concentration or great attention while doing something

Very important because other things depend on it; often describes a moment, event or decision

to make something possible, practical, or easy

to show something, point to something or make something clear