A red box indicates that the student has incorrectly analyzed the question and will have to correctly analyze it twice before earning a star. Each situation is color-coded with either a yellow or a red box. Once a star is earned, that question is removed from the que of questions to be analyzed. A star is an indicator of correctly analyzing the question. As a student progresses through a difficulty level, a system of stars and other indicators are used to indicate progress on the level. This approach provides the student extra practice on questions for which they exhibited difficulty. If a student's analysis is incorrect, then the student will have to correctly analyze the same or very similar question twice in order to successfully complete the activity. In order to complete an activity, a student must correctly analyze each question for that difficulty level. Alternatively, the questions are provided in a separate file for preview purposes. To gain a feel for the cognitive difficulty of this Concept Builder, we recommend that teachers attempt to complete one of the difficulty levels. And the Wizard Difficulty Level includes the four most difficult questions from the Master Difficulty level. For instance, the Master Difficulty Level includes all the questions from the Apprentice Difficulty Level. There is a little redundancy from level to level. Includes the middle four Question Groups plus four additional Question Groups. The ratio of the two sound intensities can be as high as eight powers of ten. The ratio of the two sound intensities can be as high as six powers of ten. Master: Question Groups 1-8. Includes the first four Question Groups plug four additional Question Groups.The ratio between the intensities of the two sounds is at most three powers of ten. The three difficulty levels can be described as follows: The three difficulty levels differ in terms of the number of questions that must be answered and in the complexity of the ratios of intensities of the two sound sources. Teachers can use the scale to help students understand the meaning of a deciBel rating. The deciBel rating of Sound Source A is marked in red along the scale. Each question is accompanied by a diagram of a deciBel scale with markings every 10 dB apart. The X of "X times more intense" is always some power of 10 - for instance, 10 times, 100 times, 1000 times, etc. Students must determine the deciBel rating of Sound Source B. Sound Source B is said to be X times more intense that Sound Source A. The deciBel rating of Sound Source A is stated. The questions are organized into 12 Question Groups and spread across three difficulty levels. There are 36 questions in the Concept Builder. This Concept Builder gives deciBels some strong conceptual meaning and is easy enough for inclusion in a Conceptual-level course that de-emphasizes algebraic formulae and mathematics. But many high school teachers shy away from the concept because of the complexity of the mathematics. It is a term that most of our students have heard prior to taking the course they have an inherent interest in learning about the term. Most Physics courses that include the topic of sound will at least mention the concept of a deciBel. The compatibility with smart phones, iPads, other tablets, and Chromebooks make it a perfect tool for use in a 1:1 classroom. The size of the Concept Builder can be scaled to fit the device that it is displayed on. The Decibel Scale Concept Builder is an adjustable-size file that displays nicely on smart phones, on tablets such as the iPad, on Chromebooks, and on laptops and desktops. Concept Builders » Waves and Sound » Decibel Scale » Teacher Notes Notes:
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