Question

model 1 - copper samples
group number volume (cm³) mass (g) substance
1 10 89.62 copper
2 60 530.80 copper
3 100 894.50 copper
4 80 716.80 copper
5 140 1255.60 copper
6 40 358.40 copper
7 120 1075.20 copper

1. what substance were the students working with to obtain the data in model 1?
2. what four variables did the students measure to produce the data in model 1?
3. briefly describe how the class might have collected the data in model 1.
4. which variable was the manipulated variable in the experiment? how do you know?
5. which variable was the responding variable in the experiment? how do you know?
6. list two constant variables in the experiment.

Explanation:

1. The table clearly labels the substance as "Copper" for each group, so the students were working with copper.
2. The columns in the table are "Group Number", "Volume (cm³)", "Mass (g)", and "Substance", which are the four variables measured.
3. They likely used a balance to measure the mass of different - sized pieces of copper and a graduated cylinder or other volume - measuring device to measure the volume of each piece.
4. The manipulated variable is the volume. We know this because the experimenters likely chose different volumes of copper samples to see how the mass would change.
5. The responding variable is the mass. As the volume of the copper changes, the mass changes in response, which is typical in experiments exploring the relationship between volume and mass of a substance.
6. Two constant variables could be the substance (always copper) and the temperature (since it is noted as a constant "Room Temperature: 21.7 °C").

Answer:

1. Copper
2. Group Number, Volume (cm³), Mass (g), Substance
3. Used a balance for mass and a volume - measuring device for volume of copper pieces.
4. Volume. Experimenters chose different volumes to observe mass changes.
5. Mass. Changes in response to volume changes.
6. Substance (copper), Temperature (21.7 °C)