Fork a Sound Objective: Formulate and test hypotheses. Materials: * metal fork Glass 1 Glass 2 Glass 3 water * three (3) water glasses of the same size Procedure: 1. Label your glasses with Glass 1, Glass 2, and Glass 3 respectively. 2. Leave Glass 1 empty, Glass 2 with half full, and Glass 3 with full of water. (refer to the figure 2) 3. Knock the glasses with a metal fork and listen to the sound it produced. 4. Observe the sound produced by each glasses and record your observation on table 1. Mygure 2. Step No. 2 Table 1. Water level and sound produced Water Level Sound Produced Glass 1 Glass 2 Glass 3 Guide Question/s: Q1. How do you think the water level affects the sound/pitch produced? Write your hypotheses. a. If the glass is empty, then the sound produced is b. If the glass is half-full, then the sound produced is c. If the glass is full of water, then the sound produced is Let's Think Deeper Q2. Where do you base your hypothesis? Q3. Did your data on the table support your hypothesis? Q4. What other questions do you have as a result of this activity?