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.

Eye blog post

-Tell me how light travels from eye to brain.
-Keywords: Pupil, lens, iris, retina, optical nerve
-Picture/video of a cows eye dissection
-Why do they have night vision? 

Your Retina changes the light into a nerve signal. The nerve signal travels along the optic nerve to your brain. Your brain decodes the light and decides what to do with the visual information. Your Retina can be damaged by too much light. In bright light, your pupil becomes smaller to keep out some light.
Behind the retina is a layer of shiny, blue-green stuff called the tapetum. Tapetum is a reflective layer of the choroid in the eyes of many animals, causing them to shine in the dark. This layer assists night vision by reflecting light back through the retina. Humans don't have a tapetum, but cats, cows, and other animals do. A cat's eyes shine in the headlights of a car because of the tapetum.

Past Problems/ Maths

1. What were the main mathematical concepts or ideas that you learned or that we discussed in class? 
Area is (A), Height is (H), and Width is (W).
2. What questions do you still have about Area? 
I always end up doing the perimeter.

Mirrors

Aim: To investigate the reflection of light rays in concave and convex mirrors.

Method:
1. Set up your ray box, triple-slit ray slide, and power supply.
2. Place the mirrors on your book as indicated below. Place the ray box at the top f the page and shine the 3 rays of light at the mirror.
3. Ensure that the middle ray of the light is hitting the mirror at a 90࿀ angle.
4. Carefully trace the directions of the three incident rays and the three reflected rays.

08.05.19

Human Rights

Seel Paragraph

Human rights are something they can do without the government taking part in it. No matter what age, culture, gender, color, everyone is equal.

There are two main laws in New Zealand that specifically promote and protect human rights. These are the Human Rights Act 1993, and the Bill of Rights Act 1990. Under the Act, the Commission has the power to resolve disputes relating to unlawful discrimination. If you believe you have been discriminated against you can ask the Commission for help.

Human rights are basic rights and freedoms that everyone should have. There are two main types of human rights - civil and political rights, and social, cultural and economic rights.

Marriage and Family. Every grown-up has the right to marry and have a family if they want to. Men and women have the same rights when they are married, and when they are separated.

The Right to Your Own Things. Everyone has the right to own things or share them. Nobody should take our things from us without a good reason.

Freedom of Thought. We all have the right to believe in what we want to believe, to have a Freedom of Expression. We all have the right to make up our own minds, to think what we like, to say what we think, and to share our ideas with other people.

The Right to Public Assembly. We all have the right to meet our friends and to work together in peace to defend our rights. Nobody can make us join a group if we don’t want to.

The Right to Democracy. We all have the right to take part in the government of our country. Every grown-up should be allowed to choose their own leaders.

Sublimation

Aim: To observe the effect of putting dry ice in water.
Method: 
1. Using the tweezers, carefully place your cube of dry ice into the beaker of water.
2. Complete the diagram below by drawing what you observe happening.
3. Fill in the missing words to explain your observe

Convection

Aim: To observe convection in a liquid

Method: 
1. Set up a bunsen burner on a heatproof mat. Put the gaze mat on the tripod but leave it just to one side of the bunsen burner.
2. Fill a 200 ml beaker with 150 ml cold water
3. Place the beaker on top of the tripod and gauze and allow it to settle for a few minutes
4. Carefully insert a drinking straw down one side of the beaker, ensuring the straw is touching the bottom of the beaker. Be careful as you do not want to disturb the water too much.
5. Using tweezers, drop a crystal down inside of the straw. Wait for the crystal to settle on the bottom of the beaker.
6. Very gently, so to not disturb the water, remove the straw.
7. Light the Bunsen and slide it under the tripod so that you are only heating the outside of the beaker where the crystal is. Observe

Results: We had to wait for the crystal to finish when it was in the tube. Then slowly, we lifted the straw and the crystal expanded.