Write opinion pieces in which they introduce the topic they are writing about, state an opinion, supply a reason for the opinion, and provide some sense of closure.
After an investigation where students observe magnets interacting with magnetic and non-magnetic objects, students write an opinion about why they think the magnets attract certain objects and not others.
Generate two numerical patterns using two given rules. Identify apparent relationships between corresponding terms. Form ordered pairs consisting of corresponding terms from the two patterns, and graph the ordered pairs on a coordinate plane.
Conduct the experiment How Strong Is Your Magnet? Students will record data and graph results. The x-axis (horizontal) is for the distance from the magnet (that is, the number of layers of tape beginning with zero); the y-axis (vertical) is for the strength of the magnet (number of paper clips it can hold).
Summarize numerical data sets, such as by giving quantitative measures of center (median and/or mean) and variability.
Follow the directions for Making An Electromagnet. To increase the strength of the electromagnet, increase the number of wire coils around the nail and record the number of paper clips you can pick up. Each pair of students will keep a table of the number of coils and number of paperclips. Then collect and average student findings to create a class chart.
Ask questions to determine cause and effect relationships of electric or magnetic interactions between two objects not in contact with each other.
Magnetic forces between a pair of objects do not require that the objects be in contact. Examples of magnetic force could include the force between two permanent magnets, the force between an electromagnet and steel paper clips, and the force exerted by one magnet versus the strength exerted by two magnets. Examples of cause and effect relationships could include how the properties of the objects and the distance between objects affect strength of the force, and how the orientation of magnets affects the direction of the magnetic force.
Apply scientific ideas to design, test, and refine a device that converts energy from one form to another.
Energy can be transferred from place to place by electric currents, produced by transforming the energy of motion into electrical energy. Possible solutions to a problem are limited by available materials and resources (constraints). The success of a design solution is determined by considering the desired features of a solution (criteria.)
Ask questions about data to determine the factors that affect the strength of electric and magnetic forces.
Electric and magnetic (electromagnetic) forces can be attractive or repulsive, and their sizes depend on the magnitudes of the charges or magnetic strengths involved and on the distances between the interacting objects. Examples of devices that use electric and magnetic forces could include electromagnets or electric motors. 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.
Conduct an investigation and evaluate the experimental design to provide evidence that fields exist between objects exerting forces on each other even though the objects are not in contact.
Examples of this phenomenon could include the interactions of magnets. Forces that act at a distance (magnetic) can be explained by fields that extend through space and can be mapped by their effect on a test object Examples of interactions could include first-hand experiences or simulations.