If it's a solid, then it's just a solid. No magic.
It's as dangerous or as flammable as it be if it had never been a plasma.
It contracts and takes up less space or has less preasure. If it is cooled enough it can condense (turn into a liquid) or sublimate (turn into a solid).
It's only dangerous if you are small enough to be eaten by them...i.e. another single celled animal.
The area becomes drier, called a drought. If the decrease is great enough then the area becomes a desert.
They are explosives dangerous enough to do permanent damage. They were originally invented by the military to use in training missions but became popular enough that fireworks stores started selling them to individuals. They are extremely dangerous and are illegal throughout the United States. As are cherry bombs.
yes, it sure is. (if the core is massive enough.) if not, it becomes a Neutron Star.
Yes definitely. Once the lava has cooled it becomes rock and it is cool enough to step on.
condenses
Lead becomes legally hazardous to humans when the lead level is above 1000pm.
If a rock gains enough heat and then is cooled suddenly enough it turns into obsidian,
Sometime back in prehistory, when the Earth had cooled enough, and stayed cool long enough.
It contracts and takes up less space or has less preasure. If it is cooled enough it can condense (turn into a liquid) or sublimate (turn into a solid).
It becomes a gas/vapor.
Earth cooled down enough for rain to fall.
Dangerous enough to bring a huge city to ruins.
If it overheats (the fan is blocked or isn't enough to keep it cooled), then yes it is :)
solid. it's called freezing x
Ascorbic acid, also known as vitamin C, is not particularly dangerous. Not having enough of it is dangerous.