What does dinitogen mean in a name?

2. how is heavy water different from normal water

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

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