Testing for protein - the Biuret test

Aim: to test if a sample of food contains protein
Method: 
1. Place about 2 ml of the sample into a test tube and add 5 drops of sodium hydroxide
2. Add 5 drops of copper sulfate.
3. Shake the test tube gently from side to side
Results: If the solution remains blue, then no protein is present. If the solution changes to a purple color then protein is present in the sample

Science

Testing For simple sugars - the benedicts test

Aim: to test a sample of food to determine whether it contains simple sugars.

Method: 

1. place about 2 ml of the sample into a test tube and then add 5 drops of benedicts solution

2. Heat with a bunsen burner until it changes color. do not boil.

Results: as soon as we put heat onto the flame, it started to change color. the color changed orange and it smelt like baby food

Testing for complex sugars - the lodine test

Aim: to test if a sample of food contains complex sugars.

Method: 

1. place about 2 ml of the sample in a test tube

2. add 3-5 drops of iodine and mix

Results: The bread changes from brown to blue without any flame

Metal - safety signs

In CMM we are learning about what are hazards and what some of the signs you may see in a workplace or workshop.




Prohibitive -  Forbidding or restricting something.
Hazard - Something dangerous 
Mandatory - Must do

What is a hazard sign?
These yellow triangular signs indicate the presence of a special hazard. A hazard is something you do but can undo it. It is something that is dangerous and can cause death.

What is a mandatory sign?
The blue circular signs indicate a mandatory requirement or instruction that must be carried out. mandatory is a must-do sign

What is a Prohibited sign?
Red prohibited signs indicate an action or activity that is not permitted.

Give three examples and explain where you would most likely see them and what action you would take.
1. At construction places where it would likely be dangerous. If it was a high building there would be a hazard sign with a high building 
2. Where earthquake damages have been. 
3. If there's a puddle on the floor people could slip and hurt themselves.

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PPE stands for personal protection equipment. PPE means any or appliance designed to be worn or held by an individual for protection against one or more health and safety hazards.

THREE TYPES OF PPE

PPE can be considered in the following categories, based on the type of protection afforded by the equipment: Respiratory protection - for example, disposable, cartridge, airline, half or full face. Eye protection – for example, spectacles/goggles, shields, visors. 

https://www.youtube.com/watch?v=qPhVZExcGXg&t=8s

Questions - 
1. Have you ever been injured in the workshop?
2. Have you tried working with the safety clothes? 
3. Have you worn overalls and was it comfortable?

This is my safety sign that I will be creating

It says 'Wash Your Hands' which will be handy in the workshop. If your hands are dirty just go over to the tap.