Lesson 2 : Lab

Time Required: 180 minutes

Investigate the behavior of an electric current in saltwater and pure water solutions, then analyze data to draw conclusions about the best type of solution to conduct electric currents.

MS-PS2-3

Ask questions about data to determine the factors that affect the strength of electric and magnetic forces. [Clarification Statement: Examples of devices that use electric and magnetic forces could include electromagnets, electric motors, or generators. Examples of data could include the effect of the number of turns of wire on the strength of an electromagnet, or the effect of increasing the number or strength of magnets on the speed of an electric motor.] [Assessment Boundary: Assessment about questions that require quantitative answers is limited to proportional reasoning and algebraic thinking.]