Simplifying Linear Expressions W3-4T4

Thinkboard W6T4

Fast Rust Task - W5T4

Fast Rust Task - With Alfa

Rust

Walt: Synthesize information from multiple resources.

Task

Work on this Doc together with a partner.

What 3 ingredients are needed for rust to occur.

Iron

Oxygen

Water

Write a brief paragraph explaining the rusting process (why rusting occurs)

Oxygen from the air mixes with water. The iron surface of the nail reacts with the oxygen mixed in the water. It forms iron oxide. Iron oxide reacts with the water. It forms hydrated iron oxide - red stuff we call rust. This process continues until all the iron is eaten up.

How could you prevent something from rusting?

Use paint and alloys (mixes of metals). Another way of avoiding rust is using spray-on wax or oil coatings that the car companies sell. One alloy that could be used is stainless steel, which helps the the iron to last longer (rusts slower). Keep iron away from water and oxygen. Another way is by galvanising. This means to coat Zinc over iron and only the zinc will be affected but you can easily wash it of. You could also use a coating of paint to stop water from getting into cracks to stop or to slow down the rusting process.

Write 3 sentences explaining something new you’ve learned from this reading.

We learnt that oxygen, air and water is what causes things to rust. Also we didn’t know that rust could be prevented by painting over the metal, using spray-on wax or oil coatings. All iron objects can be rusted if they are exposed by oxygen and water including trains, bikes (chains), skateboards (wheel bearings), house roof and many other things. One interesting fact that we found out was that the harbour bridge has the biggest paint job to prevent it from rusting.

To The People That Have Been Affected By The Earthquake

To the people that have been affected by the earthquake in the South Island, we hope you guys will recover from the damage in your communities. Our prayers and thoughts are with you all. We hope you recover soon… you are in our hearts. We are sorry to hear these kind of things and hope you haven’t lost anyone in your family.

On Tuesday the 15th of November, 8:17 AM a disaster struck. A strong magnitude 7.5 earthquake hit 15 km N of Kaikoura, New Zealand. It is one of the biggest earthquakes in New Zealand. Tsunami warnings have been announced to affect the top of the South Island. I hope that this is not the case.

I understand that houses were badly damaged and so were roads. The earthquakes also caused landslides, power cuts and floods. Some business owners didn’t have insurance. This meant that damage to their buildings would cause them to move out or they would have to pay for the damage. During the earthquake many gutless robbers decided it was good to loot and take from houses stealing people's belongings. These people deserve to be caught and punished.

Once again we are sorry for your hometown being affected by this natural disaster. Hopefully you guys find your way through life. God bless you all.

Algebra W3T4