Q: Q: Pyramids of net production and biomass reflect what level of efficiency? A:

OPTIONS:
- high
- medium
- extreme
- low

A: low

Q: Q: To undo the tarnish on copper pennies, you can place them in what liquid? A:

OPTIONS:
- distilled water
- honey
- seawater
- vinegar

A: vinegar

Q: Q: Inside a cylinder, thermal energy is converted to what type of energy of the moving piston? A:

OPTIONS:
- residual energy
- horsepower
- electrochemical energy
- kinetic energy

A: kinetic energy

Q: Q: The sum of the kinetic and potential energies of a system's atoms and molecules is called what? A:

OPTIONS:
- mechanical energy
- used energy
- stored energy
- internal energy

A:
internal energy