Scientific Methods Answers

A scientist studies the effect of adding different amounts of salt on the boiling point of water. He places his results in the graph below.What are the independent and dependent variables in this experiment?

A scientist would most likely need to update her model when it

What must be part of a quantitative observation?

An experiment was conducted to see which metal pot would be better for cooking food quickly. The table below shows how quickly small pieces of wax melted during the experiment. Type of metalTime for the wax to melt (seconds)Aluminum27Bronze45Copper15Steel80The following statement was made after the data were examined: “Copper pots are the best pots for cooking food quickly.” Which term best describes this statement?

Several scientists from different countries are asked to examine the results of an experiment before a journal will print it. Which term best describes this step of the investigative process?

Which is one way that scientists communicate the results of an experiment?

Which best describes the act of using senses or tools to gather information?

Which best describes the purpose of a controlled experiment?

Read the lab procedure for a controlled experiment that looks at the effect of heat on the circumference of bicycle tires.Step 1: Pump up six identical bike tires to the recommended air pressure.Step 2: Place three tires under heat lamps, and keep the other three tires at room temperature.Step 3: After four hours, measure the circumference of each tire. Step 4: Record your results in the table.Step 5: (?)Which step should be next in this procedure?

Which is an example of making a qualitative observation?