Synthetic materials are made from natural resources. Synthetic materials are made by chemically changing the starting substances to create a material with different characteristics. Some examples of ...

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 ...

As picturesque as winter weather can be, snowy scenes often present a less desirable, slippery companion: ice. It coats our roadways, clings to windshields and serves as a general hurdle in daily life ...

THE effect of chloride-containing solutions on Portland cement has received relatively little attention. Batta 1 and Thorvaldson 2 noted that addition of chloride ions to solutions containing sulphate ...