Question: Why does the water level in the straw go down when the bottle-and-straw thermometer is cooled, but not frozen?
Reference answer: Water contracts when the water is cooled.

Student answer: When the water gets cold it contracts thereby lowering the water level in the straw.

Student answer: The water is expanding. The water molecules are getting colder so they all huddle up into a ball and go to the bottom.

Student answer: This happens because cold water is more dense than hot water or regular water so the water volume starts to go down or starts to contract.

Student answer: Because cold water has less density so it goes up.

Student answer: Because cold water shrinks and is less dense so it goes down.

Student answer: It happens because the water cools down so the water goes down.

Student answer: The cold water pushes the water level down.

Student answer: Since the water is cooled the water gets compacted causing the water level to contract.

Student answer: Cold water is denser so it goes down.

Student answer: Because it is getting cold inside but is going to go down.

Student answer: When water is cooled the water level goes down because of the density. More dense.

Student answer: It happens because cold water contracts when it is cooled.

Student answer: This happens because the water takes up more space.

Student answer: Cold water is cold and it would sink in a regular thermometer.

Student answer: Because the cold water makes it less dense.

Student answer: Density.

Student answer: It goes down because cold water stuff goes down. And hot water does not go down.

Student answer: Water is contracting.

Student answer: Because it contracts when it is cold.

Student answer: Cooler water drops or contracts because it is denser than tap water. Same here.

Student answer: The water level goes down because it is a real type of thermometer and on a real one if something cold the water level goes down.

Student answer: Because the water is denser so it forces it to contract.

Student answer: It happens by it being frozen.

Student answer: This happens because when water is cooled it contracts and gets less dense.

Student answer: Because the water contracts.

Student answer: This happens because where water is cooled it contracts.

Student answer: Because cold water is less dense than hot water.

Student answer: The reason this happened was because it is so cold that the water expanded.

Student answer: Because it was placed in ice or in cold water to make it go up.

Student answer: The water is cooled so it contracts.

Student answer: Because when you cool it down the level it used to be will be lower.

Student answer: Because it is put in cold water and not hot so it will go down.

Student answer: The thermometer is less dense.

Student answer: When it in cold water it contracts.

Student answer: When water is cool it contracts.

Student answer: Because the cold always sinks down to the bottom so when you put it in it contracts down.

Student answer: And whenever it is cold the temperature goes down.

Student answer: Because when water is cold it goes to the bottom.

Student answer: The water level goes down because it is denser and means it sinks.

Student answer: Because cold water is denser than the hot water.

Student answer: The water contracted.

Student answer: Because is cold water.

Student answer: Because when the cold or hot water goes down.

Student answer: Because the cold water is denser.

Student answer: Because the water is dense.

Student answer: The water contracts because it is so cold it will make the temperature go down.

Student answer: Because cold water sinks to the bottom, it contracts meaning it is denser.

Student answer: Because cold water is dense the water goes down.

Student answer: Because cold water is denser than hot and it contracts.

Student answer: When cold water gets something dense it goes down.

Student answer: When water gets colder it contracts.

Student answer: Because cold water is less dense.

Student answer: Because cold water is denser than room temperature water. The water contracts when the thermometer is placed in cold water.

Student answer: Because it is cool and cool water is more dense so it goes down.

Student answer: Because coldness sinks, more dense.

Student answer: Cold water contracts because of density.

Student answer: Because the cold water is more dense so it goes down.

Student answer: Because cold water is more dense.

Student answer: The water contracts.

Student answer: Water contracts when cooled.

Student answer: Because cold water is denser than room temperature.

Student answer: Cold water contracts.

Student answer: The cold water makes the water contract.

Student answer: The cold water goes down because it has to contract.

Student answer: The water is less dense than the regular water and that makes it to go down.

Student answer: When water gets colder it contracts.

Student answer: The water level went down because it is less dense.

Student answer: Because cooled water sinks.

Student answer: Because cold water makes it go down and hot water makes it go up and cool water stays the same.

Student answer: Because the molecules get closer together and take up less room.

Student answer: The molecules come back together so it goes down.

Student answer: When the water gets cold the molecules want to get warmer.

Student answer: It goes down because cold molecules contract or come together.

Student answer: The molecules want to stay together for warmth.

Student answer: It cools it down.

Student answer: Because cold water is more.

Student answer: Because cold is the opposite of hot so it will go down.

Student answer: The water becomes more dense so it bunches up.

Student answer: Because when the molecules are hot they jump around but when they cool down they compact together and the water goes down.

Student answer: Because the coolness causes the cool water to go down.

Student answer: Because when the temperature cools it goes down because that is what a regular thermometer would do.

Student answer: The cold water wants to get away from the warmer molecules so the water goes down.

Student answer: Because the water is so cold it goes up.

Student answer: Because cold water is denser than room temperature water.

Student answer: Because the water is more denser the hot water.

Student answer: The water contracts.

Student answer: The cold water is less denser, it is getting more dense.

Student answer: When the water in the bottle is cooled it goes down because it has no other place to go which means it is more dense which is contracting.

Student answer: Because it is cold water.

Student answer: The cooler water is dense.

Student answer: Because I experimented it.

Student answer: Because cold water is less dense than hot water. When a substance is hot very dense, it expands.

Student answer: Because the water is down because the water is cold.

Student answer: Because the water is getting denser and it needs to retract to get denser.

Student answer: Because it is cooler.

Student answer: Because when it gets cold the cold water wants to sink so it pushes to the bottom.

Student answer: Because the atoms squeeze together and takes up less space.

Student answer: Because it contracts water and goes down to the bottom of the bottle.

Student answer: Because it contracts.

Student answer: Because the water is dense so it needs a little less space.