This document discusses microorganisms and decay. It notes that microorganisms like bacteria, fungi, algae and protozoa are found in soil, air, water, on skin, and inside our bodies. They help break down organic matter through decay. The document asks questions about how microorganisms cause decay and how temperature affects decay rates. It also discusses how microorganisms can be either harmless or harmful if they produce toxins, damage cells, or cause infectious diseases. Finally, it asks how the spread of diseases caused by microorganisms can be prevented.

1. Grade 6

2. Living
organism
so small
Need
microscope

4. Bacteria Fungi Algae Protozoa

5. Soil
Air
Water
Skin
Inside our body

7. Organic
Matter

9. Decay

11. How?
Keeping
food in ref

12. Microorganisms and Decay:
Investigating how temperature affects
decay

13. What conclusion can you make from the
results of your investigation?

15. harmless
harmful

16. produce toxins
Damage
cells

17. Infectious
diseases

23. How can you help
prevent spread of
diseases caused by
microorganisms?