Year 7 Science: Separating Mixtures

Learning Intention: Students will understand that the different properties of substances allow them to be separated in different ways – particle size, density, magnetism etc.

Success Criteria: Students will be able to identify 10 different methods of separation and give an example of each. They will be able to draw a flow chart to separate a mixture of sand, salt, rice and iron filings.

This term in Year 7 Science you will be starting a unit of work on Separating mixtures. You will be learning about the following processes and how they are used when separating mixtures:

  • Centrifuging
  • Crystallization
  • Chromotography
  • Distillation
  • Evaporation
  • Filtering
  • Froth Flotation
  • Gravity Separation
  • Magnetic Separation
  • Seiving

Can you think of some examples of how these methods are used in the home and in the workplace? At the end of this unit of work you will be asked to separate a mixture of salt, sand, rice and iron filings.  Download a worksheet to check your understanding of the definitions for each of these processes here:  Separating Mixtures worksheet
You may like to try these quizzes:

Check out the Year 7 wiki for more about Separating Mixtures.

Year 8 Earth Science

Nature's Window, Western Australia

Learning Intention: Students will understand the properties of igneous, sedimentary and metamorphic rocks and how they are formed. They will relate chnages in landscape formations over time with processes such as weathering, erosion, fossilisation and movement of continental plates.

Success Criteria: At the completion of this unit each student will be able to distinguish between igneous, sedimentary and metamorphic rocks and give common examples of each. They will be able to describe the way our earth changes over geological time.

This photograph was taken at Nature’s Window, near Kalbarri, in Western Australia. You can see the layers of different coloured rock, which indicates that this is sedimentary rock. In the western district, we see a lot of igneous rocks, formed from lava flows of volcanoes. Metamorphic rocks are those that have changes over time due to heat and pressure.