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)

1. an experiment in your science class lists the materials needed for the lab. it is your job, as a lab partner, to measure out 25 ml of distilled water and 2.5 grams of magnesium. what lab measuring tools would you choose to measure each substance and how would you use each tool to get the correct amounts? be sure to describe the process you would follow step-by-step. (5 points) 2.which of the following is an si base unit for measuring mass? (2 points) ampere gram meter pound 3.which of the following is an si base unit for time? (2 points) decades hours minutes seconds 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer. 5.a pencil beside a metric ruler. the ruler is scaled from 1 centimeter to 10 centimeters, with markings for millimeters between each number. one end of the pencil is beside the 0 on the ruler, and the pencil point is beside the 5. which of the following measurements is accurate but not precise? (2 points) 5 mm 5 cm 50 mm 50 cm 6. which of the following prefixes represents the largest value? (2 points) giga hector kilo milli 7. which of the following types of graphs is best for plotting the percentages of a whole value in a data set? (2 points) bar graph circle graph histogram line graph