In the video, how did he make clouds in a bottle?
Compressed water vapour became small water droplets which came out as clouds
What causes water to change from liquid to solid?
Water changes form in response to changing temperature. When it becomes colder,
What causes water to change from vapour to liquid?
Water changes form in response to changing temperatures. When the temperature becomes colder, water vapor becomes liquid water
In the first expt in the video, water in which of the 3 paper sheets evaporated the fastest, and why?
The sheet under the hottest lamp, increase in temperature increases the rate of evaporation
Why did the huge steel barrel collapse when put in an ice tub?
gas quickly condensed to liquid. Outside pressure being more than inside, quickly crushed the barrel
How do we know there is Water Vapour in the Air?
Some evidence that there is water vapor in the air include clouds, feeling moisture on our skin on a humid day, and seeing droplets form on the outside surface
Does Water become cleaner when it becomes water vapour? Give reason
Yes, generally, water becomes cleaner when it evaporates. Particles in water typically do not evaporate into vapor when water does, so particles are left behind
What is Precipitation? Name the different forms
When water falls to the ground - Rain, Snow, Hail
Term used to change liquid to gas. Give example
Evaporation
What happenned to the dirt and grass in the DIY Solar bowl? Explain the expt
Dirt and grass got left behind. Only water evaporated
Term used to change gas directly to a solid. Give example
Deposition. Sub freezing air changing directly to Ice