CK-12 Foundation
Ck 12: Life Science: Seasonal Changes in Plants
[Free Registration/Login may be required to access all resource tools.] Have you seen the leaves of plants change colors? During what time of year does this happen? What causes it to happen? Plants can sense changes in the seasons....
Annenberg Foundation
Annenberg Learner: Journey North: Watching the Seasons Change: Spring
This is an appropriate resource for investigating the impact seasonal change has on organisms. Have your students track the changes that come with spring by journaling. The online table addresses physical changes in the environment...
CK-12 Foundation
Ck 12: Biology: Leaves
[Free Registration/Login may be required to access all resource tools.] Discusses different types of leaves and seasonal changes in leaves.
CK-12 Foundation
Ck 12: Life Science: Plant Hormones
[Free Registration/Login may be required to access all resource tools.] Plants may not move, but that does not mean they don't respond to their environment. Plants can sense gravity, light, touch, and seasonal changes. Learn more about...