Bacteria are present all around us in the air, water, and some foods. Students observed two bottles, one with more bacteria than the other, to learn how bacteria can affect the environment. Bacteria can impact the environment through their presence in the air, water, and interactions with other organisms.

1. HOW DO BACTERIA AFFECT THE ENVIRONMENT?
EIGHTH GRADE
Guided Stage.
Activity.
Bacteria are everywhere in your environment.
They are in the water, in the air, and even in
some foods.
1. Read and complete a lab safety form.
2. Carefully examine the contents of the
two bottles provided by your teacher.
3. Record your observations in your
Science Journal.
Think About This
1. Compare your observations of bottle A to those of bottle B. Which one appears to have more
bacteria in it? Support your answer.
2. Key Concept Based on your observations, how could bacteria affect the environment around
you?
From: From: iScience, Davis County Edition. Page 755.