A tape measure.
Balanced
Scientists use sedimentary rock to determine a fossil relative age by studying the rock.
A magnifying lens would be handy for observing luster.
One of the biggest fallacies of fossil dating is that they use the rock layer to help determine the age of the fossils, but the fossils are also used to help determine the age of the rock layer.
Relative dating refers to the process of determining the age of a rock, feature, or fossil by comparing it to the rocks around it. To use relative dating, you need to look at the order each rock layer was deposited.
A magnit
My pyramid
a ruler
Balanced
A rock, a stick, a club.
Thermometer
ruler
Statistics
Risk Assessment Matrix
The Census
The Census
If you want to measure the length, use a ruler.