Differentiate evidence from opinion, knowing scientific claims are backed by observations that can be confirmed. Use numerical data in describing and comparing objects, events, and measurements. Predict the outcome of simple investigation and compare results to predictions. Collect data in an investigation and analyze them to develop a logical conclusion. Build a simple compass and use it to detect magnetic effects.
Electric currents produce magnetic fields and build a simple electromagnet.
Understand the role of electromagnets in the construction of electric motors, generators, and simple devices such as door bells and earphones. Know that electrically charged objects attract and repel each other. Magnets have two poles, labeled north and south, and unlike poles repel each other while like poles attract. Electrical energy can be converted to heat, light, and motion. Measure weight, length, or volume of objects.