Tell students that even though the liquids look the same, they may have different properties or characteristics. Explain to students that scientists make discoveries by observing and testing different ...

In this and the following lessons in Chapter 2, students continue to develop this idea and see that the characteristic properties of a substance ... for this age group for showing that different ...

There are lots of different substances but only just over a ... Notice that metals and non-metals have opposite properties to each other. It is usually easy to tell metals and non-metals apart ...