Wastes
Fuel
Smoke
Gas
Toxic chemicals
Answer:
D. Vibrating around fixed positions
Explanation:
It's right on edge
The independent variable is the one we are changing in the experiment. As we change it, the dependent variable might also change.
C. the density of the rock because we are changing the density of the rock and seeing how all other variables change with regards to the density.
A computer screen is energy transfer
The answer is b (bladder)