a ruler and a protractor a magnet and a thermometer a graduated cylinder and a balance an Erlenmeyer flask and a Bunsen burner
I gave my students this multiple choice question: Which pieces of equipment would be used to measure the density of a solution?

Only one answer is correct among these 4 choices:
- a ruler and a protractor
- a magnet and a thermometer
- a graduated cylinder and a balance
- an Erlenmeyer flask and a Bunsen burner

Could you tell me which one is correct?

a graduated cylinder and a balance