you can easily use those terms to define density as Density = mass/volume and then use those terms in the lesson. NGSS 5-PS1-3: Make observations and measurements to identify materials based on their ...

Note: We are purposely using the terms “size” and “amount” instead of “volume” in this lesson about density. We are also using “heavy”, “light”, and “weight” instead of “mass”. If your students have ...