Bacteria

Hi guys today in science we are looking at bacteria. We watched two videos about bacteria and what it does and all the different types of it. We are also learning about what happens to it and how they live.

Bacteria is shaped like a rod or a spiral. Bacteria is both good and bad since it helps you in different ways as well as its bad. Bacteria is also inside of your cells and is makes up 90% of it. Bacteria also adapts.

WALT
To look and different types of Bacteria.

What is Bacteria?
1. Feeding :
Most bacteria are consumers, this means they cant make their own food in sunlight, which means they have to feed by using other living things. Bacteria doesn't have a digestive system like other things. Bacteria will wait for things to decompose before they eat it. They start to eat things when they are more rotten.

2. Reproduction :
Bacteria does not have any gender. One bacteria does not need another bacteria to reproduce. The name for the reproduction is Mitosis. They make more bacteria by constantly splitting when they need too. They can split every 15 - 20 minutes. The smaller cells are named daughter cells which means they will become identical, it will be the same colour and look the same. They will keep of splitting unless there isn't any more food. When the get to a certain size they have to spilt, which is the only way bacteria can live.

3. Excretion : 
The food bacteria eat is important to help them be able to live. It gives them energy and helps them grow, damaged parts and also repair them. They pass waste products out of them cells membrane, and into what they are living on or in. They produce substances which could be poisonous if they are living on something or in. Bacteria feeds on living things and cause diseases and are called pathogenic bacteria and they are harmful to you.

4. Breathing : 
All different types of living things need oxygen so their cells can covert food into energy. The process is called respiration. Bacteria are able to carry out both aerobic and anaerobic respiration. Respiration is when there is heaps of oxygen Anaerobic respiration are carbon dioxide which is breathed out, water, and heat. That is why bacteria starts to decompose substances like a dead body. The temperature goes up. Bacteria can breathe even if there is even no oxygen.