The processes like crystallisation, boiling, vaporisation, burning of colour, melting point, hardness etc, are called physical changes. These are reversible in nature. The processes like ...

Chemical reactions involve the interaction and transformation of molecules. The Maillard reaction is one example that occurs in baked goods, where sugars react with proteins to create new molecules ...

This module connects ideas across topics in a first semester introductory chemistry course to explore the impacts of combustion reactions. By motivating students to understand the relationship between ...

I love to bake and eat depression cake. It was invented during the Great Depression in the 1930s, when some cake ingredients – like eggs, milk and butter – were hard to get. The recipe makes fluffy ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. A catalyst is a substance that speeds up a chemical reaction. Catalysts ...