Question: Look at the 2 pictures of drops on a flat, waterproof surface. The drop on the left is soapy water and the drop on the right is plain water. What causes the plain water to look like it does?
Reference answer: Surface tension causes the plain water to look like a bead.

Student answer: The plain water looks like it does because plain water is supposed to turn into a dome when it is on a flat surface.

Student answer: The plain water can stick together much better because nothing is breaking it up.

Student answer: It causes it to look like that because it has no soap in it and soap makes water flat.

Student answer: The plain looks like that because of water surface tension.

Student answer: It is called a dome and it forms a round like in the water.

Student answer: The plain water looks like this because it is all water and has nothing more dense in it.

Student answer: The plain water looks like that because it is just plain water.

Student answer: Surface tension.

Student answer: The plain water is like a dome because it does not have soap in it.

Student answer: Surface tension.

Student answer: It looks like that because there is surface tension around the water.

Student answer: It causes it to look like that because it has no chemicals in it to fall apart like when you add soap to it, it breaks.

Student answer: The plain water does not have any soap.

Student answer: Because it is normal water and it does not have anything in it.

Student answer: Surface tension makes it dome up.

Student answer: Surface tension.

Student answer: Maybe of the sides.

Student answer: The surface tension kept it up because there was no soap in the water.

Student answer: Surface tension is holding it together.

Student answer: What causes the plain water to look like it does is surface tension. Surface tension is the skin like that holds the water together.

Student answer: Surface tension causes it.

Student answer: The plain water has no soap in it to break its bubble.

Student answer: It looks like that because of the surface tension it has.

Student answer: Surface tension makes it look like that.

Student answer: The plain water looks like that because of surface tension.

Student answer: A skin like surface called surface tension that forms over the water causes it to bead up into a dome like drop.

Student answer: The has surface tension and that makes the water hold together in a dome shape.

Student answer: Because the plain water has more texture than the soapy water.

Student answer: Nothing breaking the surface tension.

Student answer: Because it is denser than the soapy water.

Student answer: Because the more you pile it up the bigger it gets.

Student answer: Surface tension skin dome.

Student answer: The plain water has a skin like tension. It is called surface tension.

Student answer: Because it is just water.

Student answer: The plain water has a more stable skin.

Student answer: The plain water has a way bigger dome than soapy water. Surface tension causes the plain water to look like that.

Student answer: Because plain water has a surface area.

Student answer: The plain water forms that because of the surface tension.

Student answer: Plain water forms a dome because of the surface tension.

Student answer: Water forms together the water just formed together and made a dome.

Student answer: Because the water does not have any molecules in the water.

Student answer: The water is formed together to make a dome.

Student answer: The plain water had nothing in it. So the plain water stacked on top of it.

Student answer: The soapy water is larger than the plain water.

Student answer: Surface tension.

Student answer: It has a better surface tension and the dome did not break because of what type of water it is.

Student answer: I do not know why.

Student answer: The plain water any soap that causes the dome around it.

Student answer: Nothing else touching it.

Student answer: The surface tension makes a dome and that is what makes it to look like a dome.

Student answer: Because plain water does not break the dome.

Student answer: Because it is just plain water.

Student answer: Because it is not soft as soapy water and it is plain water.

Student answer: Surface tension.

Student answer: Surface tension.

Student answer: The water forms a dome and does not break the surface tension.

Student answer: Surface tension causes the plain water to make a bead or dome shape.

Student answer: The plain water is a dome because the sphere of water breaks on the flat surface area and expands into a dome. Since water a liquid has no definite shape or size unless it is turned into a solid ice.

Student answer: The plain water has surface tension. That is why it is in a dome shape.

Student answer: It causes it by having low density and weight.

Student answer: Because it had more surface tension.

Student answer: It is a surface tension.

Student answer: The plain water does not have any soap or chemicals.

Student answer: The plain water is less dense and has more surface tension.

Student answer: What causes the plain water to look like it does is the surface tension making it dome shaped.

Student answer: Surface tension.

Student answer: Surface tension on plain water.

Student answer: Surface tension.

Student answer: Surface area.

Student answer: Normal water has surface tension that keeps the water together.

Student answer: Surface tension.

Student answer: Surface tension.

Student answer: The plain water has nothing inside it so it stays dome shape.

Student answer: Surface area.

Student answer: It does not have anything in it so that helps it stay up like that.

Student answer: Because plain water does not break surface tension.

Student answer: The plain water does not have any chemicals in it. If you put more drop on it it looks like it might burst. This is beaded up.

Student answer: Surface tension causes it to.

Student answer: The plain water builds up like a building.

Student answer: The plain water Has more surface tension to hold the bubble together.

Student answer: Surface tension causes the water to bead up.

Student answer: Because it probably evaporated.

Student answer: Surface tension.

Student answer: Because it is more denser.

Student answer: Because it does not have soap.

Student answer: Plain water has no soap in it so it is like a dome.

Student answer: Surface tension.

Student answer: Because it is plain has nothing in it and if there was something in it would be almost like the other drop.

Student answer: Surface tension lets it keep that shape and bead up. It has so much density that it is trying to contract.

Student answer: Because the plain water does not have soap.

Student answer: Surface tension.

Student answer: Water makes a dome. Just water.

Student answer: Condensation is the thing that forms the water to rise, condensation causes it to look like it does.

Student answer: Surface tension keeps it beaded up.

Student answer: The surface tension.

Student answer: Its very light ingredients.

Student answer: Surface tension holds the water up so it will make a dome.

Student answer: Because there is nothing that is denser in the water.

Student answer: Surface tension a tight skin that holds it together to form a dome.

Student answer: It bead domes like the rain.