Content :

Sound [Gr.9]

 Resonance [Gr.9]
 Interferences [Gr.9]
 Waves and building designs [Gr.9]

Content Standards :

 demonstrates understanding of sound resonance, interference, and basic acoustics.

Performance Standards :

 chooses appropriate materials for a specific function

Learning Competencies :

 creates a model to explain natural frequency of matter.
 explains how resonance causes sound production in musical instruments.
 investigates the conditions required for resonance to occur in various media.
 creates models to illustrate constructive and destructive interferences.
 cites advantages and disadvantages and applications of interference.
 explains how knowledge of properties of waves is applied in building designs.
 identifies sources of noise in different environment and explain how noise can be reduced to acceptable levels.