You are given a sentence and your task is to generate another sentence that supports the given input.

Average continental crust is about 35 km thick;
The earth's continental crust, on average, is 35 kilometers thick.

Isolated system A system in which neither matter nor energy is exchanged with the surroundings.
A sealed, vacuum-insulated reaction flask approximates the condition of a isolated system, in which neither matter nor heat can be exchanged between system and surroundings.

All matter is composed of basic elements that cannot be broken down to substances with different chemical or physical properties.
All matter in the universe is composed of one or more unique pure substances called elements.