Task 1
Draw a diagram for a council that needs to manage suitable food and garden scraps. Link accepted scraps, decomposers, suitable conditions and checks of the output.
AC9S4H02 • Homework
Using Science to Meet Needs and Solve Problems worksheet
Use eight independent written and practical reasoning tasks. An adult checks the actual work.
Open practiceEight science-to-need tasks
Use separate paper for diagrams and explanations. Study cultural examples through the attributed sources; do not harvest plants or handle industrial waste.
Task 2
Read the ACARA water-project account linked in the lesson. Write a short recommendation for how a community could judge whether a proposed treatment meets its needs, naming three things to check and explaining why each matters.
Task 3
Use the linked ACARA Yolŋu Yirrkala example to make a four-box explanation: material needed, plant knowledge, useful object and future supply.
Task 4
Choose one clean plastic product. Draw two possible futures: cared-for continued use and littered outdoors. Explain how one property matters in both.
Task 5
Design a safe tabletop comparison that could illustrate friction and stopping. State what changes, what stays the same and what you would measure. Explain the connection to bicycle grip.
Task 6
Draw a recycling line containing steel, aluminium and plastic. Show a magnet removing what it can and label what continues to another sorting step.
Task 7
An imaginary facility finds 9 plastic pieces in one equal-sized compost sample before sorting changes and 3 after. Explain the improvement and one reason to repeat the sampling.
Task 8
Compare two solutions from the lesson that use different science ideas. For each, name the need, explain how the solution works and state evidence to check.
Answers and adult review checks
Task 1
Answer: Decomposers break down suitable organic matter; air, moisture and temperature affect the process. Check accepted items and contamination.
Inspect a connected original diagram with a causal link and a check. Do not require handling compost or animal waste.
Task 2
Answer: Possible checks include source-water quality, treated-water quality, quantity required, maintenance and local operator training.
Require an attributed account, three relevant checks and a reason for each; do not claim the documented project is currently completed.
Task 3
Answer: Stringybark provides a painting surface; knowledge of the tree and season supports obtaining material while protecting survival and future supply.
Inspect four linked notes with specific source/community attribution. No bark removal or copying cultural artwork is required.
Task 4
Answer: Durability can support repeated use but can also make litter persist. Other justified properties are acceptable.
Inspect two distinct diagrams and the same property correctly linked to each outcome; tiny fragments are not assumed harmless.
Task 5
Answer: Change one surface, keep object and starting method the same, and measure stopping distance. Lower resistance can allow farther travel; this is a model, not a full road-safety test.
Inspect a controlled plan, measurement and qualified science connection. No riding or walking on slippery surfaces.
Task 6
Answer: Suitable steel is attracted; aluminium and plastic remain for other methods.
Inspect material labels, correct destinations and a stated limit. Do not accept every metal being removed.
Task 7
Answer: Fewer pieces were found after the change, but contamination remains; repeated equal-sized samples check whether the pattern is consistent.
Require both numbers, cautious conclusion and a meaningful reason for repeats. Do not require an average.
Task 8
Answer: For example, compost conditions support decomposers for waste processing; magnetic attraction separates suitable steel for recycling. Check processing/contamination and recovery respectively.
Inspect two scientifically different examples with full causal links and evidence specific to each need, not just a list of products.