Answer:
The presence of a few PLATES
Answer:
I believe the scientific property referes to the composition, on an atomic level, of an element or compound. It's property(ies) are what constitutes the element in an isolated state, but also how it reacts to changes in environment: (temperature, humidity, etc..); but also how it reacts to other elements. What changes occur and if it has the potential to change it's molecular "structure".
Harnessing the sun´s energy to produce heat or electricity is non- polluting.
You do not need to worry about if this is correct. I know for a fact that it is correct because I just took a test on this, and I made a 100. So the answer is non-polluting!
Have a nice day!
Hope this helped!
appear; disappear
im not 100% sure if thats what is being asked, but they fit and are true