Lugo de Llanera Primary School – Take a peek inside our English classes


Year 3 rocks!

Our last Science lesson was extremely fun. We simulated the rock cycle using wax crayons. And you know we do love all hands-on activities. We now can name the three different types of rocks in the rock cycle process: sedimentary, metamorphic and ignious rocks.

In the previous lesson we watched videos and presentations about different minerals and the way we use them. We have learnt about the pumice, slate, marble, chalk and granite.

Then, we used the interactive whiteboard to review and explain our next activity: a worksheet about minerals.


Our favourite part was last lesson. We watched We will rock you video and the fabulous Rock Cycle video. And then, we re-created the rock cycle in our Science class. Once again we used the Scientific Approach: problem, materials, procedure, results-conclusion.


How does a rock change from an igneous rock, sedimentary rock, metamorphic rock, and then back into an igneous rock?


  • Wax crayons or oil pastels in contrasting colours
  • Aluminium paper or foil paper
  • Plastic knives and sharpeners
  • A kettle and water
  • Kitchen paper
  • A bowl


  1. We remove the paper around each crayon and observe them. They are in the ignious rock stage.
  2. We sharpen, grate or shave the crayons. This represents weathering and erosion.
  3. We put the crayon shavings-sediments in piles. This is the laying down of sediments.
  4. We fold up the foil and press down very hard. This represents the pressure that creates sedimentary rocks.
  5. Then, we add heat. We put our sedimentary rock crayon into hot water for a few moments. This is the metamorphic rock.
  6. Finally, we rewrap our heated, squished “metamorphic rock”. We melt this crayon rock into  boiling water. And wait till is cold to examine it. This is our ignious rock.


Our crayons have gone through a cycle similar to that of a rock. They start off smooth and hard and after the heating, cooling and pressure they go from one state to another, like the ignious, sedimentary and metamorphic rocks.

Here you can see us during the whole process, and you can also visit our photo gallery.


  1. You really rock! How much fun while learning! I think you really enjoyed this Science activity.
    Hugs to all of you.

  2. Teacher Piedad

    Thank you, teacher Susana

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