Here's a quick piece of bell work for your students. It's a quick read
with a funny story and will work well with a geotropism
lesson. If you think geotropism confuses your students imagine how this field of peanuts felt.
http://deltafarmpress.com/blog/when-down-becomes-how-379-acres-peanuts-got-confused
What is geotropism (gravitropism)?
Natural ability of seeds to detect the gravitational pull of the earth and send stems up and above the surface and send roots down in the soil to uptake moisture and nutrients.