"experiment on how spiders sense vibrations in their webs. I grabbed a ball of black yarn and had my students sit in a circle. The each told a spider fact that they had learned and passed the ball of yarn around while holding on to a piece. Soon we had a huge web. I then had my class close their eyes and tossed rubber insects into the web. They raised their hands to show they felt the vibration!"
Plant Investigation Unit: All About Plants, Life Cycle and Needs
This is a complete unit on soil and its important role in our environment. I have included every page with coloured graphics and then with black and white graphics so you can copy which ever format suits your needs best.