• OVERALL UNIT GOALS:  WAVES AND ELECTROMAGNETISM

Central Concept: Waves carry energy from place to place without the transfer of matter.

4.1 Describe the measurable properties of waves (velocity, frequency, wavelength, amplitude, period) and explain the relationships among them. Recognize examples of simple harmonic motion.

4.2 Distinguish between mechanical and electromagnetic waves.

4.3 Distinguish between the two types of mechanical waves, transverse and longitudinal.

4.4 Describe qualitatively the basic principles of reflection and refraction of waves.

4.5 Recognize that mechanical waves generally move faster through a solid than through a liquid and faster through a liquid than through a gas.

4.6 Describe the apparent change in frequency of waves due to the motion of a source or a receiver (the Doppler effect).

Central Concept: Oscillating electric or magnetic fields can generate electromagnetic waves over a wide spectrum.

6.1  Recognize that electromagnetic waves are transverse waves and travel at the speed of light through a vacuum.

6.2  Describe the electromagnetic spectrum in terms of frequency and wavelength, and identify the locations of radio waves, microwaves, infrared radiation, visible light (red, orange, yellow, green, blue, indigo, and violet), ultraviolet rays, x-rays, and gamma rays on the spectrum

1. Electromagnetism

Central Concept: Stationary and moving charged particles result in the phenomena known as electricity and magnetism.

5.1 Recognize that an electric charge tends to be static on insulators and can move on and in conductors. Explain that energy can produce a separation of charges.

5.2 Develop qualitative and quantitative understandings of current, voltage, resistance, and the connections among them (Ohm’s law).

5.3 Analyze simple arrangements of electrical components in both series and parallel circuits. Recognize symbols and understand the functions of common circuit elements (battery, connecting wire, switch, fuse, resistance) in a schematic diagram.

5.4 Describe conceptually the attractive or repulsive forces between objects relative to their charges and the distance between them (Coulomb’s law).

5.5 Explain how electric current is a flow of charge caused by a potential difference (voltage), and how power is equal to current multiplied by voltage.

5.6 Recognize that moving electric charges produce magnetic forces and moving magnets produce electric forces. Recognize that the interplay of electric and magnetic forces is the basis for electric motors, generators, and other technologies.