This powerpoint sparks the students' interests through a story. There was a teacher that had 2 dogs, Larry and Riley. Before she let for work she let the dogs out and gave them food and water. When she returned from work, she let the dogs out and they were sad. Their water was GONE!
This is where I ask the students what they think happened. (Did another dog steal it? Did it tip over?)
I say I think someone stole it. So that night, I filled the water bowl and watched from my window.
Nothing happened. This is where I introduce the children to the thief...THE SUN! Then I teach them about evaporation :)
The powerpoint is only the dog story to spark curiosity.