For example, we looked at a fish, and asked if it was living or non-living. Most kids said right away that it was living, because it was moving around and was an animal. Then we looked at a ball, and asked if it was living or non-living. Most kids said non-living, and when I asked why, they said "because it doesn't move." So then I pushed the ball, and asked them if the ball was living now. That seemed to challenge a few scientists. Some students thought yes, the ball is alive when it's moving. Others said no, it's not living, because you pushed it. So we modified our criteria for what makes something living - it needs to be able to live on its own.
Another interesting query was around a wagon. Is a wagon living or non-living? Most said non-living, but a few said living, since it moves. Teddy bears, on the other hand, don't move, but they do have eyes and a heart, so some kids weren't sure how to qualify it. You'll see some of their answers in the pictures below. All in all it was a great discussion about a tough question, and the kids did a great job thinking like scientists!
|"A tiger is living."
|"A word is nonliving."
|"A ball is nonliving."
|"A cat is living."