Alive? Once Alive? Never Alive?

What clues do you use to tell if something is alive, or was never alive?

Did you find something interesting?
Is it alive or might it become alive?
Was it alive before, but now it isn’t?
Is it a piece of something that was once alive?
Was it never alive?

Discuss with a friend the clues that helped you decide your discovery is alive, was once alive, or was never alive.
If a pretend space alien came to Earth and observed you, what could it notice about you to decide whether you are living or never alive?  What could it notice about a tree? a car? an apple seed? a cloud? your shirt?

Try this later:

Adults! Check out these activities at home:
Living vs. Nonliving Lesson plan from PBS Learning Media
Read “Living Things and Nonliving Things: A Compare and Contrast Book” (Available from San Mateo County Library system) or “Seres vivos y no vivos: Un libro de comparación y contraste”  and its  Teacher Activity Guide  from Arbordale Publishing