Are all rocks the same?

We have been learning to compare and contrast. We first practiced as a whole class using landforms...One Tree Hill and Aoraki Mt Cook.

We were each given a rock (some of us used the rocks we had collected from around our houses). We looked at our rock, and them explained to a buddy what we could see. On a Venn diagram we made notes on  the similarities and differences we observed.

We shared what we found, and then talked about how a geologist might categories rocks. We thought they might do this based on colour. We decided to categories our rocks based on colour. 

We decided that there were some rocks in the wrong colour category, so we moved these rocks. This is how we finally categorized our rocks.

There was still some debat over some rocks being in the right colour category. We decided that geologists probably don't categories rocks based on colour because many if the rocks we looked at aren't just one colour.

Mahek asked a really good question...why are rocks different colours? Siddhesh thought this might be because rocks come from different places and the colour of the rock tells you if it is from a mountain or a river. Olivia and Emily thought that the colour of the rock tells you what country the rock is from.