A. The best Option that serves as a standard URGENT ANSWER OVERDUE B. A setting, object, or person that is photographed for marketing or artistic purposes

C. A representation of reality that can be used to do tests or experiments

Question 2: What are the benefits of models? (you may select as many as are true.)

A. Models can be safer than other methods of experimentation

B. Models are exact representations of reality with no limitations

C. models can be more ethical than other methods of experimentation

D. Models can be more possible than other methods of experimentation

Question 3: Match the type of system with the example.

Hot Tea inside an insulated thermos (Closed System or Open System)

A can of Pepsi on the kitchen table (Closed System or Opened System)