Importance of bacteria

1.

IMPORTANCE OF BACTERIA

2.

Lesson objectives
To explore the production of yoghurt and
cheese.

3.

IMPORTANCE OF BACTERIA
VERY important for ecology:
circulation of materials in
ecosystem. Ex: nodule
bacteria that live in
symbiosis with soybean root
fix nitrogen from air and give
to soybean.They convert
nitrogen to ammonia.
Ammonia is used by soybean

4.

Rotting bacteria help for circulation
of materials.They convert dead
organisms into humus and minerals.
Also they eat our food and digest
them

5.

Symbiotic bacteria
E.coli
bacteria live
in human
intestine and
help for
digestion.

6.

Fermentation bacteria
They are bacteria
that convert sugar in
milk and convert it
into lactic acid.This is
used in yogurt and
cheese production.

7.

Homework
Read p. 130-131
Answer to literacy questions on p 131
New words