Question: Mary was trying to understand how tuning forks make sounds. She hit the tuning fork on the table and placed the tuning fork into a cup full of water while it was still ringing. The water splashed in all directions. How did seeing what happened help Mary understand how a tuning fork makes sounds?
Reference answer: The water splashed because the fork was vibrating. Vibrations make sounds.

Student answer: Because if you bang it on the wood it starts to make a weird sound! But if you put it in water, you can see that it is moving because the water goes swash so you can see it move.

Student answer: By a ping pong ball, a table, a cup full of water, and most of all hitting it too hard.

Student answer: Because it vibrates in the water.

Student answer: Because it was vibrating. I do not know what it means!

Student answer: Because there are vibrations and vibration more and so it was moving in the water so it made it splash.

Student answer: By hitting the fork and putting it in the water.

Student answer: Because if it splashes it is vibrating so she knows now.

Student answer: The vibration that the tuning fork makes.

Student answer: Vibrations did.

Student answer: Because when you hit it vibrates and it vibrates in the water.

Student answer: Because it is the vibration making it splash.

Student answer: Because the vibration makes the water splash.

Student answer: It vibrates because you hit it against something hard.

Student answer: The tuning fork is metal so when you hit the tuning fork it vibrates to make sound.

Student answer: Because after Mary hit it on a table it vibrated and the vibration made the water splash!

Student answer: Because When you put the tuning fork in the water you can see the vibrations.

Student answer: Because you hit it on a wood and that make it vibrate.

Student answer: Volume - It got louder. When it splashed it got a kind of noise - quiet noise.

Student answer: Because when you hit the tuning fork makes waves.

Student answer: Seeing what happens helps understand because you can see what is happening when you do it.

Student answer: The vibrations are like digging in the water and make a sound zzzzz!

Student answer: The sound waves travel through the water.

Student answer: Because when she hit the tuning against the table and put it in a cup of water and the water splashed.

Student answer: Sound travel through water.

Student answer: Because it vibrated so since that vibrated she noticed the splash and she thought it must of been vibration.

Student answer: Because if you put it in the water it has volume and volume helps make sound.

Student answer: It helped Mary understand that the tuning fork makes sounds by vibrating because the water splashed.

Student answer: When the tuning fork is vibrating the would splash because when something is vibrating then something that is touching the tuning fork. So it would vibrate also.

Student answer: Because she can be know that the vibration travel in the water.

Student answer: I think it helped because when you see it you can see it vibrates.

Student answer: When the water splashed vibration caused it and that is what cause the sound too.

Student answer: That helps because of the vibrations.

Student answer: It makes a sound in the water and you know that it makes a sound because the sound vibrates the water and where there is sound there is vibration.

Student answer: By putting the tuning fork in the water while still ringing.

Student answer: She will what experiment.

Student answer: By looking at how it vibrates.