City University of New York
Exploring Life: Response to Stimuli
A good explanation of the concept that living things respond to their environment, or stimuli in their environment. The site gives real life examples.
eSchool Today
E School Today: Your Revision Notes on the Characteristics of Living Things
Discusses the five characteristics that living things have and nonliving things do not.
CK-12 Foundation
Ck 12: Life Science: Tropisms
[Free Registration/Login may be required to access all resource tools.] Plants may not be able to move, but they are able to change how they grow in response to their environment. Growth toward or away from a stimulus is known as a...
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...
Alabama Learning Exchange
Alex: Creating a Life Form
In this particular lesson, the students will create an unknown life form and planet. The creation of the life forms will begin at the chemical level and be explained throughout the levels of organization to the level of organism. The...
Khan Academy
Khan Academy: Are Viruses Dead or Alive?
Are viruses alive or dead? How do we determine whether something is alive? Let's compare viruses to the 7 criteria researchers have set to determine if something is alive.