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Achievement objective MW 6-1

Students will:

  • identify patterns and trends in the properties of a range of groups of substances, for example, acids and bases, metals, metal compounds, and hydrocarbons; Explore factors that affect chemical processes.


  • Collects and collates data on the chemical and physical properties of a variety of substances.
  • Classifies substances by physical properties such as hardness or conductivity.
  • Classifies substances by chemical properties such as reactivity in air or water.
  • Predicts the chemical or physical properties of substances based on membership of a known group.
  • Justifies the choice of a substance for an application based on its chemical and physical properties.
  • Relates the rate of a reaction to changes in surface area and concentration.

Possible context elaborations

  • What conditions cause corrosion and rust and how can we prevent it from happening?
  • How do we extract iron from iron sand? Why can we 'pan' for gold but not for iron?
  • What conditions slow down the decay of food or speed up cooking processes?
  • Which hydrocarbon makes the best fuel?
  • Why do we use kindling to light a fire but logs once it is well lit?
  • Which substance makes a good antacid?
  • How can I choose the best metal for a piece of jewellery?
  • How does the pH of a substance (for example, shampoo, bathroom cleaner, vinegar) relate to its usefulness?
  • What is the best way to get a cake to rise?
  • Why does tap water sometimes go murky?
  • A 'cycle of copper reactions' that can be classified according to the interactions of the particles.

Assessment for qualifications

At the time of publication, achievement standards were in development to align them with The New Zealand Curriculum. Please ensure that you are using the correct version of the standards by going to the NZQA website.

The NZQA subject-specific resources pages are very helpful. From there, you can find all the achievement standards and links to assessment resources, both internal and external.

Learn more with NZQA subject resources for:

Aligned level 1 achievement standards were registered for use in 2011 and level 2 for use in 2012; level 3 will be registered for use in 2013.

Learning described by this objective could be assessed using one or more of these achievement standards:

  • Science AS90944 1.5, AS90945 1.6, AS90946 1.7, AS90947 1.8, AS90953 1.14
  • Chemistry AS90930 1.1, AS90932 1.3, AS90933 1.4, AS90934 1.5

Last updated September 15, 2020