The samples in the pictures are - ROCK CRYSTAL, PYRITE (fool's gold) and
the mineral rose quartz in its natural and polished state
We spent time this afternoon trying to identify our great collection of rock and mineral samples.
Some we recognised easily e.g. granite and sandstone.
St. Magnus Cathedral is a famous example of a red sandstone building.
Others we had never heard of e.g. obsidian and basalt.
Firstly, we sorted the rock samples by their rock type.
IGNEOUSSEDIMENTARYMETAMORPHIC
To find out more about how these different rocks were created click on the Rock Houndshomework link where you will find an animation explaining how each type of rock was formed.
We then attempted to sort a few of the easier samples by property e.g. How hard is it?.
We found that marble and granite were very hardbut sandstone and chalk were quite soft.
We know that granite and marble are used in buildings.
Aberdeen is called the 'Granite City' because so many of the buildings there are made of granite.
Granite is an example of an igneous rock. Graniteis the signature rock of Planet Earth. Other rocky planets such as Mars, Venus and Mercury are covered with basalt, as is our ocean floor.
Try out our 'Who Am I'? rock quiz on the homework link. It is VERY tricky!
Our next task will be to show how igneous rocks can be grainy and made of large crystals or smooth and glassy.
We will be melting sugar to ... follow our blog to find out what happens next...
We wanted to find outif we could show a chemicalreaction taking place by mixing 2 substances together.
We used 2 reactants in our experiment, bicarbonate of soda (sodium bicarbonate) and vinegar (ascetic acid).
We guessed - would we perhaps create a new product?
What we did was we added a big spoonful of bicarbonate of soda to a small plastic container that was half full of vinegarwith a little bit of red food colouring for effect!
What happened was thatINSTANTLY the 2 reactantsfizzed up and poured out of the container! This showed that a chemical reaction had taken place and that a GAS was present. The gas was carbon dioxide.
This showedus that we could demonstrate a chemical reaction by mixing 2
substances together. Cool!
(Mixing 2 substances does not always create a chemical reaction).
Experimenting with fabrics is part of our materials investigation... ...research on YOU TUBE showed us that we could be more creative with our tie dye designs...
We are studying rocks and minerals as part of our Materials investigation this term. We are testing for rock properties. We know these properties make rocks and minerals suitable for particular jobs.
The name for the study of rocks is geology.
Can you identify each local rock sample pictured on the blog?
We have found out there are 3 types of rock, IGNEOUS , METAMORPHIC and SEDIMENTARY.
We know Orkney has a lot of sedimentary rock (check out the BBC Learning Zone Class Clips animation link) in particular old red sandstone.
Sedimentary rock is rich in fossils.
Any rock or fossil examples locally that can be shared with us would be very much appreciated.
We have found out that local rocks used for building in Orkney in the past were sandstone,conglomerate andlimestone.
We would welcome the expertise of a local builder who could explain to us the benefits and problems with old local building materials and advantages that new materials they work with might have .
We will be looking for rock samples around the school grounds and going to look for materials used in local Kirkwall buildings.