Today for maths I did Percentage Problems. It was really hard doing these percentage questions. We needed Mrs Stone’s help for the last 2 slides. Me, Vika and Mary did the first 2 slides together. Please leave a positive comment on my blog. Thank you!
Today for reading i did Journal word find. It was really easy and fun. I loved this task so much. There are six hidden in the word find. Please leave a positive comment on my blog. Thank you!
Fast Rust Task
What 3 ingredients are needed for rust to occur.
|Iron||Water||Oxygen from the air|
Write a brief paragraph explaining the rusting process (why rusting occurs)
|1. Oxygen from the air mixes with the water
2. The Iron surface of the nail reacts with the oxygen mixed in the water. It forms iron oxide
3. Iron oxide reacts with the water. It forms hydrated Iron oxide – The red stuff we call “rust”
4. This process continues until all the Iron is eaten up
How could you prevent something from rusting?
|You can protect metal from rust by, covering with paint, coating oil or even plastic, this helps prevent rust from metal, but if the metal were in water for example the harbour bridge which is located in New Zealand is made out of steel and is in salt water, The first half of steel is not in water. Therefore it gets coated with paint at least three times. But the bottom of the harbour bridge which is the other half of the steel has to get coated more than three times because of how it is easier and faster for the rust to process.|
Write 3 sentences explaining something new you’ve learned from this reading.
Something new I’ve learnt from this reading is that Iron is soft and to make Iron useful you need to combine carbon to Iron to make Iron Alloy.
Something new I’ve learnt from this reading is that Iron is the fourth most common element in the universe.
Something new I’ve learnt from this reading is that Steel rusts faster or slower in different environments. Sometimes, it can take years for a piece of steel to rust.
Write down any new words you found in Fast Rust or the article about rust. Make sure you learn what the word means and write down a definition you understand for each new word.
|Corrosion||A breakdown of materials due to a chemical action like rusting.|
|Element||In chemistry, The simplest form of a substance, which cannot be broken down by chemicals into anything simpler|
|Silhouettes||A picture which is all black with no colour and only outlines|
|Corrode||To be eaten away by a chemical action (such as rusting)|
|Rate||How quickly somethings happens (speed)|
|Alloy||A metal mixed with another element to make the metal stronger or more resistant to corrosion|
|Compound||A combination of two or more elements bonded together|