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Unit of Inquiry 'How the World Works' Rocks

Palmerston Campus Year 4 students have really enjoyed their latest Unit of Inquiry, 'How the world works'. The Central Idea is 'Natural processes influence the lives of people'. Students used chocolate to find out how igneous, metamorphic and sedimentary rocks are formed. How fantastic!

Here’s what they had to say:

  • Rocks can change and are always changing - Charlotte
  • Rocks are made in different ways - Jacob
  • Rocks are unique - Miguel
  • There are three ways rocks can be formed. Igneous rocks form when magma cools - Miguel.
  • Metamorphic rocks are rocks that have been changed with pressure and heat - Mitch.
  • Sedimentary rocks form when sediments harden and over time different sediments form different layers of rock - Jake.
  • We made conglomerate rocks which are sedimentary rocks that have smaller rocks inside - Jacob
  • To make our Igneous rocks, we melted chocolate and poured it into a flour mold. We then used water to show erosion and expose our igneous tower. The result was a hard tower they did not budge when the water washed over it.
  • To make our metamorphic rock, we remelted some of the igneous rock, mixed in another melted rock (honey) and let it set. The result was a soft ‘rock’ that felt like play dough.
  • To make our sedimentary rock, we layered different sediments (melted chocolates). To make our own conglomerate rock, we mixed lollies, biscuits and sprinkles into melted chocolate and let it set. We cut them open to reveal the same effect as a conglomerate rock.

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