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Pupil A

Pupil A. What is the name given to a large crystal in an igneous rock?. Pupil B. Explain what you understand by the term ‘groundmass’ in igneous rocks. Pupil C. What size are the crystals in igneous rocks if the igneous rock is classified as fine-grained or volcanic?.

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Pupil A

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  1. Pupil A What is the name given to a large crystal in an igneous rock?

  2. Pupil B Explain what you understand by the term ‘groundmass’ in igneous rocks

  3. Pupil C What size are the crystals in igneous rocks if the igneous rock is classified as fine-grained or volcanic?

  4. Pupil D What is the name of the texture of an igneous rock in which all the crystals are roughly the same size?

  5. Pupil E What name is applied to igneous rocks that have a low silica content and contain feldspar, augite and olivine?

  6. Pupil F Name the igneous texture that has large phenocrysts surrounded by a finer grained groundmass

  7. Pupil G Which igneous rock has crystals over 3mm in diameter and contains quartz, feldspar and mica?

  8. Pupil H Name a fine grained igneous rock that is made up of mainly augite, feldspar and a little olivine

  9. Pupil I Which two minerals make up the majority of most basalts?

  10. Pupil J Which type of igneous intrusion is tabular or sheet-like and is also discordant?

  11. Pupil K Which type of igneous intrusion is tabular or sheet-like and is also concordant?

  12. Pupil L Name the structures formed in lava flows, dykes and sills due to the relatively slow cooling and contraction of lava/magma

  13. Pupil M Which mineral would you expect to be found in both granite and basalt?

  14. Pupil N Name a mafic igneous rock

  15. Pupil O What is meant by the term ‘concordant’?

  16. Pupil P What is the name given to the fine grained edges of intrusions such as dykes and sills?

  17. Pupil Q Name a coarse grained igneous rock made almost entirely of olivine

  18. Pupil R Which structures are formed by the submarine eruption of basalt?

  19. Pupil S Which type of igneous feature is thought to be responsible for mass extinctions of life?

  20. Pupil T State three differences between sills and lava flows

  21. Pupil U Which igneous texture is formed by the instantaneous cooling and solidification of lava erupted into water?

  22. Pupil V Name the igneous texture formed by gas bubbles becoming trapped in lava

  23. Pupil W What is the name given to large oval or circular igneous intrusions such as Dartmoor and Bodmin Moor?

  24. Pupil X Name a type of lava that is associated with explosive volcanic eruptions

  25. Pupil Y Which property of lava determines whether the eruptions will be relatively passive or more violent?

  26. Pupil Z What is the main difference between a sill and a dyke?

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