why objects make sound, due to vibration, due to jumping, by singers, by instruments, if we stretch the piece of elastic tighter and plucks it harder the sound will be ......, louder and higher pitched, lower pitched, quieter, noisy, if we replaced the elastic with a thicker piece the sound will be ......., lower pitched, higher pitched, if you hit the gong hard the sound will be ......., louder, quieter, if you hit the gong with less force the sound will be ......., louder, quieter, loud and quiet describe the ............of a sound, volume, pitch, high, low, high and low describe the .........of sound, volume, pitch, the least air resistance acts on the parachute made from ......., plastic, paper, cotton, nylon, gravity acts on the parachute in the ............direction of movement, same, opposite, air resistance acts on the parachute in the ............direction of movement, same, opposite, if we use larger nylon parachute how much time it will take to land, more than 2.1, less than 2.1, what is force X, gravity, upthrust, what is force Y, gravity, upthrust, what happens if force Y is more than X, boat will not be affected, boat will sink, if we change the height of the ramp to check the force needed to move an object on the ramp, what is the independent variable, the height of the ramp, the force needed, the ramp, the object on the ramp, what is the pattern in this investigation, force increases with increasing height, force decreases, height only change, no pattern, if we draw the table pattern on a graph x axis will be .......and y axis will be ......, x: height and Y : force, y: height and X : force

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