Answer:
A. The scientist can decrease the mass while keeping the volume constant.
D. The scientist can increase the volume while keeping the mass constant.
Explanation:
The given density is 6.1 g/cm³
Density is related to mass and volume as:
\(density=\frac{mass}{volume}\)
As given that 1 centimeter cube of material has mass of 6.1 grams.
The decrease in density means, that either the mass should be decreases or the volume should be increased.
hence
A. The scientist can decrease the mass while keeping the volume constant.
D. The scientist can increase the volume while keeping the mass constant.
