Question: Johnny drove to the store with his father one cold and rainy night. They had only driven a short distance when the windows "fogged up" on the inside. What was it about the windows that caused the "fog" to form on them?
Reference answer: The windows were cooler than the water vapor in the air, causing the vapor to condense.

Student answer: The windows in the car were cold because it was cold outside. There was lots of water vapor in the car, so it stuck to the cold windows and changed into condensation water.

Student answer: They were cold and since Johnny probably turned the heat on the water vapor would turn into water again and settle onto the windows.

Student answer: Condensation only occurs on cold surfaces and the windows are cold so the water vapor condense on them.

Student answer: The condensation to form on the windows was the coldness of the cold air outside.

Student answer: No answer.

Student answer: It was when something warm touches something cold it makes condensation.

Student answer: When water vapor touches a cold surface it becomes water vapor.

Student answer: When hot or warm air touches cold air it becomes fog or condensation. The air outside was cold so it made the window cold.

Student answer: When coldness touches warm air it turns into condensation.

Student answer: Water vapor caused the fog or condensation to form on the windows.

Student answer: The windows caused fog to form because the heater was probably on and the windows were cold so it caused condensation.

Student answer: Hot air touching cold air.

Student answer: They were very cold.

Student answer: Probably because the window was warm.

Student answer: The windows had to be cold condensation forms when water vapor touches a cold surface.

Student answer: The condensation.

Student answer: The water vapor caused it to fog up.

Student answer: It was raining so water vapor made that fog to form on the windows because rain clouds carry water vapor.

Student answer: The cause was water vapor.

Student answer: I guess that when condensation hits cold surfaces the window condensation comes.

Student answer: The warm air was hitting the cold air.

Student answer: The surface was warm and when cold air hits a warm surface, condensation happens.

Student answer: It was condensation.

Student answer: It rained on the car so that how it happened because it rained.

Student answer: When warm condensation hits a cold surface it causes fog.

Student answer: It is condensation.

Student answer: When warm things touches cold places it forms condensation.

Student answer: Since the windows were cold and the rain was also touching the windows, it caused condensation.

Student answer: When warmer water vapor hits the surface it causes fog.

Student answer: The heat inside and the cold outside.

Student answer: It formed because water vapor touched a cold surface, and formed condensation.

Student answer: Because the windows are closed you can see water vapor on them.

Student answer: It was that it was a cold night and that made the windows cold and when water vapor touches a cold surface it turns into condensation.

Student answer: When the warm water vapor hit the cold surface it caused condensation.

Student answer: It was a cold and rainy night and when warmer air touches a cooler surface it forms condensation.

Student answer: The reason why is because the water vapor hit the cold surface and became a liquid that's called condensation.

Student answer: The windows were cold and so the water vapor condensate on the window.

Student answer: The fog on the windows was caused by condensation. Condensation is when water vapor hits a cold surface car window it cause the surface to fog up.

Student answer: The rain cooled the windows a little then the air inside the car air was a little warmer so it formed little water droplets.

Student answer: The fog is caused by condensation.

Student answer: The water that evaporated from the ground evaporated and touched a colder surface than itself.

Student answer: The reason why the windows fogged up was because when it rains the water outside evaporates into water vapor and when it touches the car's cool surface windows it changes back into water and that is what formed the condensation rain is not usually freezing its warm.

Student answer: The windows were cooler than the water vapor so it fogged up.

Student answer: Warm air hitting the cool windows.

Student answer: It is because the coldness and the rain mixed together and it is a cold surface it makes condensation.

Student answer: Frozen it do the fog.

Student answer: Condensation went on the windows so they could not see a thing.

Student answer: Well human have hot skin and when you touch cold things they fog up.

Student answer: The warm vapor inside the car hit the cold air outside.

Student answer: It evaporated.

Student answer: The windows are so cold and can fog.

Student answer: Hot and cold air.

Student answer: The water vapor stuck to the side and became water.

Student answer: The windows became fogged up was because of the cold. That way is evaporation.

Student answer: It was surface area.

Student answer: The air.

Student answer: The rain was falling and it probably evaporated fast when it fell down that it fell right on their windows.

Student answer: The warm air hit the cold surface and caused condensation on the windows.

Student answer: Because water warms up, then it evaporates to the clouds, then it cools, and it forms rain. And then it is condensation.

Student answer: The air temperature outside made the fog also called condensation form because of the cold air.

Student answer: It was cold, read explanation above.

Student answer: The window had a cold surface, so water vapor formed on it.

Student answer: The water evaporated.

Student answer: No answer.

Student answer: The warm air from the inside touched the cold surface of the window which made condensation.

Student answer: The reason the windows formed condensation was because water vapor hit the window which was colder or hotter than the water vapor which formed condensation.

Student answer: Warm moist air hitting a cold surface.

Student answer: It was condensation.

Student answer: The water vapor was in the car and tried to get out but was trapped and began to fog.

Student answer: The windows were warm and the outside was cold. So that is what happened.

Student answer: Inside the car was like a hot day. The windows were a glass and outside was like cold lemonade. The water vapor condensed and turned into water. It stuck to the window because that is near the cold part.

Student answer: When it is a cold and rainy night you usually want to put the defrost on the inside of your car that causes the fog.

Student answer: The windows were cold so the water vapor tried to get outside of the car but it could not so it stuck to the windows.

Student answer: The windows were cold and when warm air hits something cold the molecules want to expand and then they hit the cold air and contract and make themselves visible.

Student answer: Because it was very cold.

Student answer: It was glass so that is how fog got on it just like if you are in the shower if you have a mirror it will fog up.

Student answer: The windows were really cold and got condensation.

Student answer: The rain caused it.

Student answer: It had nothing to do with the window. It had to do with the air.

Student answer: The windows were cold on one side and warm on the other.

Student answer: The heater is may be cold outside on the window.

Student answer: Because the fog went on the window because the water in the fog wanted to be on a surface so it went on the window.

Student answer: Because outside there was a lot of water and the water condensed on the window, and condensation happens on cold surfaces and the window is cold.

Student answer: Because the cold condensation stuck to the clear surface.

Student answer: The windows on the outside are cold and so water goes to the opposite side of the coldness. Because water likes cold air.

Student answer: Water vapor in the car.

Student answer: The heat in the a car made the water vapor expand to the cloud spot.

Student answer: It had rain on it and it was cold.

Student answer: Because it was very cold and then they started the car up and then there was heat and water vapor formed.

Student answer: Because the weather is rainy and cold to make steam from the air bisect like a magnet to glass window.

Student answer: It was the coldest area possible for the condensation.

Student answer: One side was wet and cold and the other side is warm and dry so it makes condensation.

Student answer: The fog was caused by water vapor and condensation.

Student answer: There was moisture inside and it was cold outside.

Student answer: The weather was cold.

Student answer: The fog on the window was water vapor that is what caused the fog on the window.

Student answer: The air and the water vapor mixed together and stuck onto the window.

Student answer: The windows were cooler than the inside of the car.

Student answer: Because it is warm inside and the water was cold so it caused water vapor.

Student answer: When it is cold and warm the cold I think pushed the window.