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WS01 - Water purification

Science, Year 7

By the end of Year 7 students explain how biological diversity is ordered and organised. They represent flows of matter and energy in ecosystems and predict the effects of environmental changes. They model cycles in the Earth-sun-moon system and explain the effects of these cycles on Earth phenomena. They represent and explain the effects of forces acting on objects. They use particle theory to explain the physical properties of substances and develop processes that separate mixtures. Students identify the factors that can influence development of and lead to changes in scientific knowledge. They explain how scientific responses are developed and can impact society. They explain the role of science communication in shaping viewpoints, policies and regulations. 

 

Students plan and conduct safe, reproducible investigations to test relationships and aspects of scientific models. They identify potential ethical issues and intercultural considerations required for field locations or use of secondary data. They use equipment to generate and record data with precision. They select and construct appropriate representations to organise data and information. They process data and information and analyse it to describe patterns, trends and relationships. They identify possible sources of error in methods and identify unanswered questions in conclusions and claims. They identify evidence to support their conclusions and construct arguments to support or dispute claims. They select and use language and text features appropriately for their purpose and audience when communicating their ideas and findings. 

Science understanding | Chemical sciences

AC9S7U06

use a particle model to describe differences between pure substances and mixtures and apply understanding of properties of substances to separate mixtures

Science inquiry | Questioning and predicting

AC9S7I01

develop investigable questions, reasoned predictions and hypotheses to explore scientific models, identify patterns and test relationships

Science inquiry | Planning and conducting

AC9S7I02

plan and conduct reproducible investigations to answer questions and test hypotheses, including identifying variables and assumptions and, as appropriate, recognising and managing risks, considering ethical issues and recognising key considerations regarding heritage sites and artefacts on Country/Place

Science inquiry | Evaluating

AC9S7I06

analyse methods, conclusions and claims for assumptions, possible sources of error, conflicting evidence and unanswered questions

Science inquiry | Evaluating

AC9S7I07

construct evidence-based arguments to support conclusions or evaluate claims and consider any ethical issues and cultural protocols associated with using or citing secondary data or information

Science inquiry | Communicating

AC9S7I08

write and create texts to communicate ideas, findings and arguments for specific purposes and audiences, including selection of appropriate language and text features, using digital tools as appropriate

Annotations

 

1. Uses scientific terminology to classify the mixture and identify its components. 

 

2. Describes filter materials and explains their intended effects.

 

3. Explains in detail the function of charcoal in the filtration process.

 

4. Identifies a change in classification of the mixture as a result of filtration.

5. Describes step-by-step the procedure for filter preparation.  

 

6. Records observations during separate trials in a table.

 

7. Describes in detail how the experimental design was modified, including the reasoning for each change.

8. Gives detailed observations of the results after modification.

 

9. Displays photographs with captions to illustrate the experimental set-up.

10. Uses scientific reasoning to explain observations. 

 

11. Explains why the experiment was not a fair test and how this limits the insights that can be gained. 

 

12. Recognises and analyses a design flaw of the filter. 

 

13. Uses scientific reasoning to justify a proposed improvement to the design.

 

14. Uses evidence to support the conclusion. 

 

15. Suggests improvements to the method, including additional steps to guarantee safe potability.