How living things depend on each other

Describing how diversity keeps communities of living things resilient, and how the relationships among organisms and their environment sustain biodiversity.

Lesson 3 of 4 4 of 17 in the course

Course map

Draft: this lesson was written with AI help and has not yet been read by a human editor.

What your class asks

This lesson asks you to describe how variety within and among communities of living things keeps those communities resilient. It also asks you to describe how living things relate to one another and to their natural environment, within a species, between species, and between species and their surroundings, and to explain how these relationships sustain biodiversity. The museum holds no record that serves these expectations yet, so this lesson offers none; your class brings its own examples and sources. 1

Curriculum expectations, with their official codes

  • B2.4 describe ways in which biodiversity within and among communities is essential for maintaining the resilience of these communities
  • B2.5 describe interrelationships within species, between species, and between species and their natural environment, and explain how these interrelationships sustain biodiversity

The lesson

Who depends on whom?

Choose a habitat near you, such as a pond, a hedge or the grass of the schoolyard. Draw arrows from each living thing to what it needs from another living thing or from its surroundings. What happens to your drawing if one kind of living thing is removed?

Check yourself

Nothing here is marked or sent anywhere. It is for you.

I can now

Notes

  1. 1. Ontario Ministry of Education, The Ontario Curriculum: Science and Technology, Grades 1–8 (2022)
Use the arrow keys or the buttons. Esc leaves.