HMH Unit 3.3 Day 1

​In the winter months, resources such as food and shelter may be limited in certain ecosystems.

​While bear and wolves don't typically consume one another, often times they interact when competing for food.

​By the end of this unit, you will understand how organisms interact.

​Look at these animals near this watering hole.

​How are they interacting with each other?

​Will these animals be able to survive if they cannot meet their need for water?

​There are both living things and nonliving things in nearly every environment. 

​Living things, such as plants and animals, interact with other living things for food and shelter.

​Living things also depend on the nonliving parts of the environment.

​Living things, also called organisms, include plants, animals, and bacteria. 

​Nonliving things include rocks, water and air.

​The living things in the image live in a forest environment.  An environment is made up of all the living and nonliving things that surround and affect an organism.

​The black bear is affected by the other living things in the picture.  The bear is also affected by nonliving things, such as climate, water, soil, light air and nutrients. 

​This forest is an ecosystem.

​An ecosystem is a community of organisms and the environment in which they live.