What is the main difference between plastics with a #2 vs, #4?
A. both are polyethylene but have different densities
B. both are polystyrene and used in packaging
C. both are polypropylene and easy to recycle.
C. both are polypropylene and easy to recycle.
You might also like to view...
The zone between the core and the crust is the:a
innersphere. b. lithosphere. c. mantle. d. convection center. e. molten zone.
In an aquatic ecosystem experiencing eutrophication, levels of dissolved macronutrients ________ and dissolved oxygen levels ________
A) remain stable; increase B) increase; increase C) decrease; increase D) decrease; decrease E) increase; decease
Instead of only generating more electricity, rising energy demands may also be met by ________
A) switching from coal and natural gas to windmills and solar technologies B) switching from natural gas to coal C) increasing the efficiency of energy consumption D) using more nuclear power instead of fossil fuels E) building more coal-burning power plants
Successful short term forecasts (a few hours) can often be made using this method of prediction
A) climatological forecasting B) upper-wave forecasting C) persistence forecasting D) analog forecasting E) probability forecasting