We talked about perception which means how you register objects.A process is undergone during the testing of any object, first we register the object and then based on our experience related to/with the object creates a notion in our mind. We now test this notion and if it turns out to be false then we think of it as a non valid notion but if it turns out to be right, the notion solidifies into a conviction and later becomes a fact.

We refreshed the learnings from last week(types of materials) and then talked about different properties any material has.These properties are:

• Mechanical
• Thermal
• Optical
• Chemical
• Radiological
• Magnetic
• Electrical 

There are a set of questions, which when answered, tell us a lot about the material and give us a direction towards the way of using it. These questions are:

 We talked about Heniretta Lacks, who was a woman whose cancer cells are the source of HeLa cell line, the first immortalized human cell line and one of the most important cell line in medical research. Her blood cells are used for testing new products, as her cells are immortal, so it is of great help.