THE DIRTIEST PLACE IN THE SCHOOL

  THE DIRTIEST PLACE IN THE SCHOOL...

Aim:
To find the the dirtiest place in Hornby High School.


HYPOTHESIS:
I think the dirtiest place in the school is underneath J block because bacteria likes dark and cold places so it will grow more.


LOCATIONS:
-Rubbish bin   -Toilet seat   -Gym floor   -Under J block   -Under tables   -Food room bench   -Chromebook keyboard   -Door handles   -Table top   -Glass window   -Our hands   -Bathroom tap  
 -Drinking fountains.   



Method:
-Take cotton bud and firmly wipe it over the surface.
-Wipe cotton bud across the agar jelly carefully.
-Seal the agar plate with cello tape and and write the location.
-Store upside down in a dark location.

CONCLUSIONS:

-The cleanest place was: Mr stocks door handle 

Because:It had no bacteria or germs on it. 

-The dirtiest place in school was: Is the J block rubbish bin.

Because: It has disgusting bacteria on it and a lot of fungus as well.

-I was surprised by: The different coloured bacteria's on it. 

-The rubbish bin grew the most fungus.

-The gym floor grew the most bacteria.

   

GROWING MOULD

Question:What causes bread to go off / Rot.


Hypothesises: When you leave it in a warm place.


Equipment: Half slice of bread, Sandwich bag (per slice), Half a paper towel, 10 mls of water.


 The black mould means: Toxic mould 

The red mould means: is fungi.


      

MAKING GINGER BEER

  
              MAKING GINGER BEER
 AIM:

I want to learn how to make Ginger Beer.


METHOD:

You will need:

• Plastic Bottle
• Water
• Lemon Juice
• Ginger
• Yeast
• Sugar

RESULTS:

What is the stuff at the bottom: 
It is yeast growing on the bottle.


What does it smell like:
When i smelt the ginger beer it smelt like alcohol and it makes your nose go all fizzy.


What does it taste like:
When i tasted the ginger it tasted like a sour and gingery taste.

What happens when you shake it:
When i shook the bottle it went fizzy and when i opened the lid of the bottle it had a gas sound like when you open a coke bottle.


DISCUSSION:
What is yeast: It is a type of fungus.

What did the yeast do to the ginger beer:It grew on the 

sugar and made it less sweet.

What are some other good uses of yeast: You can use it in bread to make it rise.


What are some other bad uses of yeast: 

SCIENCE BADGE QUESTION 7

             SCIENCE BADGE QUESTION 7



Question: How does milk become yoghurt.

Hypothesis: You add the milk and then you add the cream and then fruits. 

Materials: Milk and Yoghurt(Fresh Plain)

Method: 

1.Heat the milk and put it in a oven set at medium to medium high degrees.

2.Then you cool the milk down.

3.Thin the yoghurt.



1. At what temperature does bacteria reproduce   37 degrees.

2. What temperature is the fridge   4-6 degrees.

3. What is the healthy temperature for the human body  
37 degrees. 


OBSERVATION:
Trim: Looks white and creamy.
Blue:Looks creamy and a little thick
Cream: It is very creamy.

Method...........

In a beaker add 150 mls of the trim milk and 2 tsps of acidophilus yoghurt. Stir to mix.Leave  out overnight. Repeat with cream and blue(full) milk.



What does it look like and smell like ?  Cream: It look's chunky and yoghurty. Blue(Fat Milk):Look's the same but just a little thick. Trim Milk(green top):Has turned into a light yellow and white colour.

What happened to change it?
Cream:It turned thick .Fat Milk(blue top):it turned creamy. Trim Milk(green top):it turned yellow and thin.

Was your hypothesis right or wrong/Why?   It was wrong because I said you have to add the fruits in when we did not add it in.

If you were to do it again what would you change?
Add more acidophilus.To make it more thicker. 


What happened?
Bacteria reproduced.
Bacteria fed off the sugar in the milk.
Trim milk made a thinner yoghurt than fat milk(blue top)and cream because it had less sugar.