Subtract the mass of the container Add leaves from other plants to the container Allow the leaves to settle in the container for a few days Use a metric ruler to measure the volume of the container
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Some students measure the mass of a small pile of leaves before and after the leaves decompose. Each time the students measure the mass, they place a container with the decomposing leaves on a balance. Before recording the mass of the leaves, the students must do which of the following?
Possibilities:
- Subtract the mass of the container
- Add leaves from other plants to the container
- Allow the leaves to settle in the container for a few days
- Use a metric ruler to measure the volume of the container

Subtract the mass of the container