30June05
Science Academic content standards for kindergarten through grade twelve, adopted by the California State Board of Education.
In particular the Physics Standards, Grades 9 through 12. "Electric and Magnetic Phenomena
5. Electric and magnetic phenomena are related and have many practical applications. As a basis for understanding this concept:
a. Students know how to predict the voltage or current in simple direct current (DC) electric circuits constructed from batteries, wires, resistors, and capacitors.
b. Students know how to solve problems involving Ohm's law.
c. Students know any resistive element in a DC circuit dissipates energy, which heats the resistor. Students can calculate the power (rate of energy dissipation) in any resistive circuit element by using the formula Power = IR (potential difference) × I (current) = I2R.
d. Students know the properties of transistors and the role of transistors in electric circuits.
e. Students know charged particles are sources of electric fields and are subject to the forces of the electric fields from other charges.
f. Students know magnetic materials and electric currents (moving electric charges) are sources of magnetic fields and are subject to forces arising from the magnetic fields of other sources.
g. Students know how to determine the direction of a magnetic field produced by a current flowing in a straight wire or in a coil.
h. Students know changing magnetic fields produce electric fields, thereby inducing currents in nearby conductors.
i. Students know plasmas, the fourth state of matter, contain ions or free electrons or both and conduct electricity.
j. * Students know electric and magnetic fields contain energy and act as vector force fields.
k. * Students know the force on a charged particle in an electric field is qE, where E is the electric field at the position of the particle and q is the charge of the particle.
l. * Students know how to calculate the electric field resulting from a point charge.
m. * Students know static electric fields have as their source some arrangement of electric charges.
n. * Students know the magnitude of the force on a moving particle (with charge q) in a magnetic field is qvB sin(a), where a is the angle between v and B (v and B are the magnitudes of vectors v and B, respectively), and students use the right-hand rule to find the direction of this force.
o. * Students know how to apply the concepts of electrical and gravitational potential energy to solve problems involving conservation of energy.
Mr. Cox liked the on-line module "Faraday's Magnetic Field Induction Experiment" Interactive Java Tutorials (the second Faraday example from FSU: © 1995-2005 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
Faraday2. Update requested: allow the magnet to rotate so that the S (south) pole can be inserted, along with the N (north) pole as in original. Add animation to show the electron flow in the "nearby circuit".
Nuclear Processes
11. Nuclear processes are those in which an atomic nucleus changes, including radioactive decay of naturally occurring and human-made isotopes, nuclear fission, and nuclear fusion. As a basis for understanding this concept:
a. Students know protons and neutrons in the nucleus are held together by nuclear forces that overcome the electromagnetic repulsion between the protons.
b. Students know the energy release per gram of material is much larger in nuclear fusion or fission reactions than in chemical reactions. The change in mass (calculated by E = mc2 ) is small but significant in nuclear reactions.
c. Students know some naturally occurring isotopes of elements are radioactive, as are isotopes formed in nuclear reactions.
d. Students know the three most common forms of radioactive decay (alpha, beta, and gamma) and know how the nucleus changes in each type of decay.
e. Students know alpha, beta, and gamma radiation produce different amounts and kinds of damage in matter and have different penetrations.
f. * Students know how to calculate the amount of a radioactive substance remaining after an integral number of half-lives have passed.
g. * Students know protons and neutrons have substructures and consist of particles called quarks.
Mr. North would find it useful to have a module to address: 11a and would be eager to present (aug. 20-22) a prototype at the S.D. Unified School District professional development workshop.