Jefferson County Science Scope and Sequence Courses: Physical Science Course Codes: 200330 Quarter: 2B ~ 3 weeks Topic(s) of Study: Waves and Optics Bodies of Knowledge: Nature of Science; Physical Science Standards(s): 1: The Practice of Science, 3: The Role of Theories, Laws, Hypotheses, and Models, 4: Science and Society, 10: Energy, 12: Motion Essential Questions: Why do the unique characteristics of the electromagnetic field produce distinct phenomenon? How do scientists design an investigation to answer a scientific question and communicate their findings? NGSSS SC.912.P.10.18 Explore the theory of electromagnetism by comparing and contrasting the different parts of the electromagnetic spectrum in terms of wavelength, frequency, and energy, and relate them to phenomena and applications. Cognitive Complexity: High SC.912.P.10.21 Qualitatively describe the shift in frequency in sound or electromagnetic waves due to the relative motion of a source or a receiver. Cognitive Complexity: Moderate OUTLINE OF (CONTENT /CONCEPT) I. Electromagnetic Waves (EM) (including light waves) a.The EM spectrum is a continuous range of waves extending from radio waves (low frequency/high wavelength) to gamma rays (high frequency/low wavelength). b. All EM waves move with the same speed, c= 3x108 m/s, through a vacuum. c. The energy of each EM wave is proportional to the frequency and give by, E=hf where h=Planck’s constant. SC.912.P.12.7 Recognize that II. Waves - Overview nothing travels faster than the a.A wave is a motion of speed of light in vacuum which is energy, NOT matter. the same for all observers no b. In a transverse wave the matter how they or the light vibration of the medium is source are moving. Cognitive perpendicular to the motion Complexity: Low of the energy and in a longitudinal wave the SC.912.N.1.1 Define a problem vibration of the medium is based on a specific body of parallel to the motion of the knowledge, for example: biology, energy. chemistry, physics, and c. Light moves as a transverse earth/space science, and do the wave and sound moves as a OBJECTIVES Identify and calculate wavelength, frequency, period, and amplitude of a transverse wave using a sinusoidal wave diagram (I) Solve problems using the equation v= f and E=hf (I,II) Demonstrate constructive and destructive interference of transverse waves by drawing the result of two interfering waves using superposition (II) Explain refraction by examining the behavior of waves as they travel between media (II) Explain reflection, diffraction and interference by examining the behavior of waves as they meet a boundary (II, III) Construct the electromagnetic spectrum with the relationships of frequency and wavelength illustrated (I, II) Validate the relationship between wavelength, frequency, and energy of different waves in the electromagnetic spectrum (I, II) Discuss the relationships among electromagnetic quantities and technological practical applications involving them (I) Jefferson County Science Scope and Sequence following(Cognitive Complexity: High): longitudinal Water waves are more complicated, but with small amplitudes they can be modeled as transverse waves. d. Wave quantities of speed, wavelength, frequency, and amplitude can be defined by examining wave diagrams. The speed, wavelength and frequency are related by the equation, v=f. e.Frequency can be observed as the pitch of a sound wave or the color of a light wave. f. Amplitude can be observed by the loudness of a sound wave or the intensity of a light wave. 1. pose questions about the natural world, 2. conduct systematic observations, 3. examine books and other sources of information to see what is already known, 4. review what is known in light of empirical evidence, 5. plan investigations, 6. use tools to gather, analyze, and interpret data (this includes the use of measurement in metric and other systems, and also the generation and interpretation of III. Waves – Properties and graphical representations Phenomena of data, including data a.Reflection – The bouncing tables and graphs), back of a wave that strikes a 7. pose answers, boundary between two explanations, or media. descriptions of events, b. Refraction – When a 8. generate explanations wave crosses from one that explicate or describe medium into another AND natural phenomena its speed changes, the (inferences), wavelength MUST change 9. use appropriate evidence and the wave MAY change and reasoning to justify direction. these explanations to c. Diffraction – The bending of others, a wave around a barrier 10. communicate results of such as an obstacle or the scientific investigations, edges of an opening. and d. Interference – When 11. evaluate the merits of the two waves occupy the same explanations produced by place at the same time the others. principle of superposition states that the resulting wave’s amplitude will be SC.912.N.3.1 Explain that a the sum of the two Describe how light travels and explain why its speed is independent of the source (II) Objectives below are from Quarter 1A and should be embedded in this topic of study. Define a scientific problem or question based on the specific body of knowledge correlated to the Physical Science course Use appropriate reference materials to support scientific investigations of various types, such as systematic observation or experiments Explain that science is based on evidence based facts Determine tools and methods that should be used to collect valid data Compare and contrast the terms that describe examples of scientific knowledge such as: theory, law, hypothesis, and model Distinguish science from other activities involving thought ( Explain why models are used in science to observe processes that happen too slowly, too quickly, or are too small or vast for direct observation Give examples of visual/physical, mathematical, and conceptual models as used in science Jefferson County Science Scope and Sequence scientific theory is the culmination of many scientific investigations drawing together all the current evidence concerning a substantial range of phenomena; thus, a scientific theory represents the most powerful explanation scientists have to offer. Cognitive Complexity: High SC.912.N.3.5 Describe the function of models in science, and identify the wide range of models used in science. Cognitive Complexity: Moderate MA.912.S.1.2 Determine appropriate and consistent standards of measurement for data to be collected in a survey or instrument. interfering waves’ amplitudes. This can lead to constructive interference (two crests make a larger crest or two troughs make a larger trough) or destructive interference (a crest and a trough partially or fully cancel each other). e.Doppler Effect – The APPARENT change in the frequency of a wave due to motion of the source and/or observer. Examples include the change in pitch of a race car engine as it approaches/recedes from a microphone and the red shift/blue shift of stars and distant galaxies as they move relative to us. f. The red shift of every distant galaxy was part of the evidence used to theorize that the universe is constantly expanding and thus must have originated as a singularity that exploded in a big bang. g.Advances in astrophysics have been made by the use of electromagnetic observations throughout the spectrum including the observation of the microwave background radiation from the original big bang.