instruction:
Combine the given two facts to write a concluding fact. Note that there should be some parts of the first and second facts that are not mentioned in this conclusion fact. Your combined fact should be the result of a chain between the two facts. Chains form when two facts connect together to produce a concluding fact. An example of a chain is: "pesticides cause pollution" (fact1) + "pollution can harm animals" (fact2) → "pesticides can harm animals" (conclusion fact). Parts of the concluding fact overlap with the first and the second fact. To construct such a  concluding fact, a useful way is to borrow the subject from one fact and the ending conclusions from another fact.
question:
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.
answer:
Plasma is formed in high temperatures of the sun.


question:
Fact 1: water causes refraction of light. 
Fact 2: When light shines through a drop of water or prism, it bends or is refracted inside the droplet.
answer:
Light is bent inside of water droplets.


question:
Fact 1: clouds are formed by water vapor rising into colder regions of the atmosphere and condensing. 
Fact 2: This water evaporates into water vapor and rises up into the atmosphere.
answer:

clouds are formed by water evaporating into colder regions and condensing.