These describe how a substance looks and behaves. There are two types of properties: physical and chemical. Watch this video about how physical and chemical properties affect which materials we ...

Students will be able to explain that the density of a substance has to do with how heavy it is compared ... NGSS 5-PS1-3: Make observations and measurements to identify materials based on their ...

The different atoms and molecules of a substance give it its characteristic solubility. In earlier grades, students observed and tested objects and materials, and saw that the items could be grouped ...

of specific chemical substances in the environment, and the Safety Data Sheets (SDS) system, which provides information concerning the properties and the handling of specific chemical substances. This ...

In fact, engineering environmentally friendly compounds usually involves tradeoffs: eco-friendly characteristics often come at the expense of other unfavorable properties, like chemical ...