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SUMMARY

Density is a measure of how compact a material is. The greater the density, the more mass is squeezed into a particular volume. Mathematically, density is expressed as the ratio of mass to volume. Duration: 8:23.

VIDEO CHECK QUESTIONS

2.5a Why is the value of pi the same no matter what the size of the circle?

2.5b Why is the density of a material the same no matter what the size of the material?

2.5c What happens to the density of the fluid within a thermometer as the thermometer registers a higher temperature?

*All video check questions can be downloaded from the EXTRAs menu.*