- Density can be calculated by measuring the mass of an object divided by the volume of that object
- A graduated cylinder is used to measure volume
- A balance is used to measure mass
- Therefore, the density of an object can be measured using a graduated cylinder and a balance

- The density of an object can be measured using a graduated cylinder and a balance
- A rock sample is a kind of object
- So, the density of a rock sample can be measured using a graduated cylinder and a balance

So, the density of a rock sample can be measured using a graduated cylinder and a balance
A class is studying the density of rock samples. What scientific equipment do they need to determine the density of the rock samples?
- Density can be calculated by measuring the mass of an object divided by the volume of that object 
- A graduated cylinder is used to measure volume 
- A balance is used to measure mass 
- A rock sample is a kind of object