Which of the following material is the weakest thermal conducters

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean

Fossil fuels are organic compounds that are made from

State one important difference between a physical change and a chemical change?