Basic Units Concept

Demonstrations in Basic Units

Brass cylindrical 1 kg mass, wooden meter stick, and large Thompson timer with 60-second dial displayed on a green demonstration table

Units of Measurement

Introduces fundamental SI base units (kilogram, meter, second) using physical examples, then builds derived units (joule, watt) through a concrete calculation: raising 1 kg by 1 m in 1 s …
White tubular frame forming a one-meter cube, with three bottom edges marked by orange-white striped decimeter intervals and blue tape at the corners

One-Meter Cube

A physical one-meter cube helps students visualize the SI unit of volume and the three-dimensional nature of derived units. Three edges from a common vertex are marked in decimeters, forming …
Four identical 473 mL translucent plastic bottles filled with different materials — one with pennies, one with white powder — arranged around an Ohaus Scout Pro 4000g digital scale
Safety

Density Samples

Identical 473 mL bottles filled with different materials are weighed to show that equal volumes can have very different masses. Students see directly that density is an intrinsic property of …