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 ...

Undertake a design project to construct, test, and modify a device that either releases or absorbs thermal energy by chemical processes. In Chapter 5, students learned how the process of dissolving ...

During the mid-twentieth century, once it was known that adding 1-2% of calcium chloride improved the strength and accelerated the hydration process, chlorine was regularly and intentionally added to ...