ミ☆ chemistry (density lab)

volume conversion between milliliters and cubic centimeters.

1 ml = 1 cm³

units for density

g/ml or g/cm³

why units are important?

they ensure clarity, consistency, and accuracy in scientific communication.

density equation

density = mass ÷ volume

how to develop a good procedure.

clearly written steps, logical order, safety checks, and repeatable measurements.

density of water

1.00 g/ml

density of pumice

~0.95 g/ml (floats on water)

density of marble

2.5–2.9 g/ml (sinks in water)

density of granite

2.6–2.7 g/ml (sinks in water)

how to draw a good graph

label axes with units, count squares to scale axes, title the graph, plot points, add a best-fit line, add a figure number, a title, and a key if there are multple data sets.

line graph vs bar graph

line graph for continuous data, and bar graph for categorical comparisons.

percent error formula

|measured – actual| ÷ actual × 100

aluminum density when cut

it stays the same, as density is an intensive property.

sink or float on water based on graph

density < 1 g/ml floats, while density > 1 g/ml sinks