Fact 1: Plasma is formed by electrons separating from atoms in stars.

Fact 2: Plasma is more common in stars, because making plasma requires high temperatures.

Given the two facts above, answer the question "Under what conditions does plasma form?" with the following options: 
- cold weather
 - under water
 - hydrogen and oxygen
 - windy plains
 - high temperatures
 - It gets heated up
 - nucleus of a cell
 - flow of electrons


 

     high temperatures    