A hypothesis is defined as an idea or explanation which can be further tested through study and experiments. It is a proposed explanation for a phenomenon.
Scientists generally base scientific hypotheses on previous observations that cannot be explained with the available scientific theories.
The answer is true because Plastic is not a mineral. It is a solid and it has a definite chemical composition. Plastic is made from oil (an organic material) and it is made by humans - plastic is not a naturally occurring substance.
