If an Australian student enjoys Biology, Chemistry, Physics or Earth and Environmental Science and wants to enter a national academic challenge, the Australian Science Olympiads (ASO) are an opportunity worth exploring. But entry works differently from a general online test: schools register students, examinations are supervised, and later Summer School or international-team places are selective. This practical guide explains the verified 2026 dates and fees, school registration process, eligibility, results and the route to international representation. It also includes twenty original Science questions and links to free authentic ASI papers. The 2026 examination cycle is already over; no unconfirmed 2027 timetable is presented as fact.

Australian Science Innovations organises the official pathway

The official Australian Science Olympiads are run by Australian Science Innovations (ASI). The programme has three successive stages: an Australian Science Olympiad Exam, a possible invitation to ASO Summer School, and—only for students selected after further training and assessment—an international Science Olympiad team. Simply paying an entry fee or doing well in an unrelated school test does not provide direct access to any later stage.

Programme	Who it serves	What to expect
Senior ASO Exams	Australian high-school students, ideally Years 9–12.	Four separately registered disciplines: Biology, Chemistry, Earth and Environmental Science, and Physics.
Junior Science Olympiad (JSO)	Australian students in Years 7–10.	Junior examinations in two age groupings, with a separate selection and development process.
Big Science Competition	Years 7–10, with authorised international school participation possible.	A separate general Science competition; not ASO Summer School selection.
School Connect Olympiad	Learners seeking independent supplementary class-wise resources.	Free chapter materials, linked educational videos and practice questions; no ASI affiliation.

Students in Years 1–6 should not assume that the official senior ASO is open to them. Australian year levels and eligibility are determined by ASI, not by SCO’s international ‘Class 1–12’ resources. For general Science enrichment, younger students can still begin with suitable free school-level lessons and age-appropriate curiosity projects.

2026 ASO examination dates, subject formats and fees

These are past dates, not a 2027 registration timetable. ASI confirms that the 2026 senior Australian Science Olympiad examinations concluded in July 2026 and registrations for that cycle are closed. The following details are the official historical record as at 18 October 2026.

ASO subject	2026 date	2026 mode
Physics	Monday 27 July 2026	Pen-and-paper, supervised at an Australian school.
Biology	Tuesday 28 July 2026	Digital assessment on a school-supervised device.
Earth and Environmental Science	Wednesday 29 July 2026	Digital assessment on a school-supervised device.
Chemistry	Thursday 30 July 2026	Digital assessment on a school-supervised device.

ASI lists A$22 including GST per student per senior subject exam in 2026, with a two-hour supervised examination. Its Biology, Chemistry and Earth/Environmental papers used the Janison assessment platform; Physics remained paper-based. All students sitting a particular exam in a school were required to sit at the same time. An ASI teacher should check the live ASO announcement for later-year fees, format and technology requirements. The older blog’s March examinations, A$35 fee and January registration start are not supported as the current official ASO rules.

ASI’s Junior Science Olympiad examinations in 2026 were held on 10 June for Years 9–10 and 12 June for Years 7–8; those registrations also closed. The 2026 fees and eligibility of the JSO Talent Development Program are separate from the senior exam and are not interchangeable. Teachers interested in the next school year can request portal access and receive ASI programme updates rather than guessing dates.

How to register: steps for Australian teachers and schools

The ASO examination does not accept individual self-registration. Australian schools, registered home schools and distance education providers submit registrations through ASI. A student should speak to a Science teacher or recognised facilitator, rather than using an unrelated competition’s sign-up page.

Step	What the eligible school or facilitator does	What the learner should understand
1. Check suitability	Review the current senior ASO subject pages, year level and any later-stage rules.	The exams are challenging; Years 9–12 are usually the most suitable.
2. Request portal access	New schools use ASI’s official request-access route; existing schools use the ASI Teacher Portal links on its programme page.	ASI accepts registrations through schools, not directly from children.
3. Await an open registration period	Follow ASI updates and current deadlines; select eligible subjects and student numbers.	As of October 2026, the 2026 ASO window is closed and 2027 dates are unconfirmed.
4. Confirm administration	Arrange supervision, the approved device or Physics paper, accessible room and required permissions.	The 2026 Science tests were two hours; formats and security measures can change.
5. Register through the school	Submit the relevant school/year-level counts and follow the invoice and exam instructions from ASI.	The parent or pupil should not send personal details through an unofficial blog registration form.
6. Receive results	Use the ASI Teacher Portal when results and certificates are released.	An ASO certificate or score is distinct from a selective Summer School offer.

ASI notes that schools do not need to provide every student’s personal details during initial registration: learners may enter information such as name, date of birth and relevant demographic details when sitting the exam. Schools should obtain appropriate consent under their own privacy policies. For help, the official competition and exam support page lists [email protected] and (02) 6125 6228, along with technology-check guidance.

Eligibility for examination, Summer School and international teams

Eligibility changes across stages. Australian Science Innovations welcomes ASO exam entries for students enrolled at Australian schools or accredited home schools, ideally Years 9–12. It does not accept registrations from tutoring centres, overseas schools or individual students. A student who is an Australian citizen but attends a school overseas is not eligible for ASO under the current school-entry rules.

Stage	Core conditions on ASI’s published page	Important limitation
ASO subject examination	Australian school, registered home school or distance-education facilitator; suitable high-school learners.	No direct individual or overseas-school entries.
ASO Summer School	Must have sat the ASO exam, earned an exemplary result and received an invitation; Australian citizenship and residency; age and school-completion rules.	A high exam score alone never guarantees an invitation.
Subject-specific age/completion rule	Students must be at least 15 on 1 January in the Summer School year. Biology, Chemistry and Physics require that Year 12 is not already completed; Earth and Environmental Science allows students who completed Year 12 the preceding year.	Check the official current criteria for the intended Summer School year.
International Australian team	Further selection after ASO; Australian citizenship and passport, not yet commenced university, subject-specific age criteria.	Selection is never a direct application based on a private online exam.

ASI describes inviting roughly twenty-four top-performing eligible students per discipline to its January ASO Summer School at the Australian National University, with further evaluation and training thereafter. The published ASO page lists A$3,500 per invited Summer School participant, covering its residential programme, and states that financial assistance may be available for demonstrated need. This is not the senior exam entry fee, not an SCO subscription and not a confirmed future-year amount. Families should verify all costs and eligibility at the point of offer.

What actually happens after the exams?

According to ASI, students receive a certificate indicating their performance. Teachers and facilitators can download official reports and certificates from the ASI Teacher Portal when ASI makes them available and notifies them. A fixed ‘results within two weeks’ promise is not supported by the current source.

ASI contacts selected students directly by phone and email to offer ASO Summer School places. Its criteria do not specify a universal pass mark: a result that is considered strong in a practice paper does not necessarily meet an invitation threshold in a particular year. Summer School also contains advanced theory, practical Science and further examinations, from which international-team members may eventually be selected.

Outcome	What it means	What it does not mean
ASO performance certificate	The student sat the official exam and has an indicated performance result.	Not necessarily a medal, guaranteed cash prize or university admission.
Summer School invitation	ASI identified an eligible student for an intensive subject-specific residential programme.	Not automatic international-team selection.
International-team selection	A small group progressed through the official training and qualifying process.	Not an opportunity that can be purchased through an SCO registration.
A practice score	A useful clue about topics to revisit.	Not an ASO exam result or guaranteed cut-off.

The original article’s A$500 and A$300 prize table and claims of automatic scholarships were not verified against ASI’s rules and have been removed. For actual recognitions and international outcomes, follow ASI’s official announcements and team reports rather than a fixed prize promise.

Genuine ASO past papers, answers and official preparation

The best indicator of authentic ASO difficulty is ASI’s own free past examinations with answers and published discipline syllabuses. ASI’s resources directory also links free Olympiads Online practice. Use the latest accessible source document’s year and subject label before interpreting its content.

• ASI senior ASO examinations and current rules — official dates, school registration, exam support, results and selection.
• ASI authentic free ASO exam papers with answers — four discipline archives.
• ASI syllabus and preparation resources — subject syllabuses, online learning and genuine practice materials.
• Junior Science Olympiad official page — separate Years 7–10 pathway.
• Official JSO past exam papers — labelled junior practice and answers.
• ASI programme updates for teachers — future dates and registration announcements.
• ASI teacher and exam support — administration and technology requirements.
• SCO free chapter-wise learning resources — supplementary linked videos and practice questions.
• Australian Science Olympiads free study guide — original Biology, Chemistry, Physics and Earth Science worked examples.

Where free School Connect resources help—and where they do not

School Connect Olympiad provides free chapter-wise learning materials, linked educational videos and practice questions, continually updated and improved. Those resources can help a learner review a concept before attempting a more advanced problem. SCO is, however, independent of Australian Science Innovations; its own school-level examinations neither serve as an ASI registration route nor confer eligibility for ASO Summer School. It would be inaccurate to describe an SCO sample paper as an official Australian Science Olympiad past paper.

If a student needs a basic explanation of food webs, circuits, atoms or measuring speed, free SCO chapters can support that foundation. If their specific goal is an official Australian Science Olympiad examination, compare their knowledge against ASI’s actual discipline syllabus and use ASI’s real past exams. The companion Australian Science study article provides broader learning strategies; this article concentrates on registration and official results.

20 original practice questions for scientific thinking

These twenty short four-choice questions are original educational examples spanning inquiry, Biology, Chemistry, Physics and Earth Science at approximately Australian Years 7–11 level. They are not copied from an ASI exam, not official ASO mock tests and not predictions of any examination paper. Try each question, then read the explanation. A learner preparing seriously for the official senior exam should also attempt genuine ASI past questions, which can be substantially more difficult.

Question 1 (Science inquiry • Y7–8). A student tests if light changes the growth of identical seedlings. Which factor should be deliberately changed?

A. Hours of light   |   B. Plant species   |   C. Pot size   |   D. Amount of water

Answer: A — Hours of light. The independent variable is the hours of light. Keeping other conditions as alike as possible makes the comparison more meaningful.

Question 2 (Science inquiry • Y8). A student takes three readings of a liquid’s temperature: 18°C, 20°C and 22°C. What is the mean?

A. 18°C   |   B. 20°C   |   C. 22°C   |   D. 60°C

Answer: B — 20°C. Add the readings to get 60°C, then divide by three. The mean temperature is 20°C.

Question 3 (Science inquiry • Y9). Two students time a rolling object. They get different results using handheld stopwatches. What is a sensible response?

A. Use only the fastest time   |   B. Hide unusual readings   |   C. Repeat trials with a consistent method   |   D. Change the ramp and stopwatch together

Answer: C — Repeat trials with a consistent method. Repeating trials with a consistent setup helps estimate natural variation and exposes timing error. Simply hiding data is not sound Science.

Question 4 (Science inquiry • Y10). A graph shows a straight increasing line between distance and time, beginning at the origin. What does its slope represent?

A. Mass   |   B. Temperature   |   C. Total time   |   D. Speed

Answer: D — Speed. For a distance–time graph, slope is change in distance divided by change in time, so its value describes speed.

Question 5 (Science inquiry • Y11). A research report shows a strong correlation between two measurements. Which statement is safest?

A. Correlation alone does not prove causation   |   B. One variable must cause the other   |   C. Both results must be wrong   |   D. A third factor can never be involved

Answer: A — Correlation alone does not prove causation. A correlation is a relationship between variables; it does not establish a causal mechanism. Confounding influences or coincidence may be involved.

Biology foundations

Question 6 (Biology • Y7). Where is most genetic information in a typical animal cell held?

A. Cell membrane   |   B. Nucleus   |   C. Cytoplasm only   |   D. Mitochondrial outer membrane only

Answer: B — Nucleus. The nucleus contains most of the cell’s DNA. Some DNA is also found in mitochondria, so ‘most’ is an important word.

Question 7 (Biology • Y8). If the number of herbivores in a simple ecosystem decreases greatly, what might initially happen to the plants they eat?

A. They must become extinct   |   B. They immediately change species   |   C. Grazing pressure may decrease   |   D. Every predator population grows

Answer: C — Grazing pressure may decrease. With fewer herbivores feeding, some plants may experience less grazing. Other ecosystem relationships can change the final outcome.

Question 8 (Biology • Y9). Which process releases usable energy from glucose in most living cells?

A. Photosynthesis   |   B. Transpiration   |   C. Pollination   |   D. Cellular respiration

Answer: D — Cellular respiration. Cellular respiration involves reactions that transfer energy from organic molecules to ATP, supporting cell activities.

Question 9 (Biology • Y10). If a dominant allele is A and a recessive allele a, which genotype is homozygous recessive?

A. aa   |   B. Aa   |   C. AA   |   D. AB

Answer: A — aa. A homozygous genotype contains two identical alleles. A recessive trait requires aa in this simplified single-gene model.

Question 10 (Biology • Y11). In a controlled enzyme experiment, why is it important to keep pH constant when investigating temperature?

A. Temperature can no longer change   |   B. pH could independently change enzyme activity   |   C. All enzymes prefer pH 7   |   D. Water has no role in reactions

Answer: B — pH could independently change enzyme activity. Both pH and temperature can affect enzyme structure and performance. Controlling pH helps isolate the effect of temperature.

Chemistry and Earth Science

Question 11 (Chemistry • Y8). Which is an element rather than a compound?

A. Water   |   B. Carbon dioxide   |   C. Copper   |   D. Sodium chloride

Answer: C — Copper. Copper is an element consisting of copper atoms. Water, carbon dioxide and sodium chloride contain more than one chemical element.

Question 12 (Chemistry • Y9). What happens to the total number of atoms of each element in a balanced chemical reaction?

A. All numbers double   |   B. Half the atoms disappear   |   C. They become different elements   |   D. The numbers remain equal on both sides

Answer: D — The numbers remain equal on both sides. Balanced equations reflect conservation of atoms. Reactants are rearranged, but atoms of each element are conserved in ordinary chemical reactions.

Question 13 (Chemistry • Y10). Which solution is more acidic: pH 2 or pH 5?

A. pH 2   |   B. pH 5   |   C. Both are neutral   |   D. Neither contains hydrogen ions

Answer: A — pH 2. Lower pH generally indicates higher hydrogen-ion activity. pH 2 is more acidic than pH 5.

Question 14 (Chemistry • Y11). A reaction uses 2 moles of A for each 1 mole of B. How many moles of A are needed for 3 moles of B?

A. 3 moles   |   B. 6 moles   |   C. 1.5 moles   |   D. 9 moles

Answer: B — 6 moles. The mole ratio is A:B = 2:1. Multiply both by three to get 6 moles A for 3 moles B.

Question 15 (Earth science • Y9). Which observation most directly supports the idea that tectonic plates are moving?

A. No earthquakes ever occur   |   B. Every rock has the same age   |   C. Seafloor spreading patterns and GPS movements   |   D. Ocean temperature remains fixed

Answer: C — Seafloor spreading patterns and GPS movements. Magnetic seafloor patterns, age of ocean crust and modern GPS measurements support tectonic plate motion.

Physics and quantitative reasoning

Question 16 (Physics • Y8). A bus travels 240 metres in 40 seconds. Its average speed is?

A. 8 m/s   |   B. 4 m/s   |   C. 10 m/s   |   D. 6 m/s

Answer: D — 6 m/s. Divide distance by time: 240 m ÷ 40 s equals six metres per second.

Question 17 (Physics • Y9). A 3 N force acts on a body over 4 m in the direction of motion. How much work is done?

A. 12 J   |   B. 7 J   |   C. 0.75 J   |   D. 1.3 J

Answer: A — 12 J. For a constant force along the direction of motion, work equals force multiplied by distance: 3 × 4 = 12 joules.

Question 18 (Physics • Y10). A 6 V supply is connected across a 3 Ω resistor. What current flows in an ideal circuit?

A. 18 A   |   B. 2 A   |   C. 0.5 A   |   D. 9 A

Answer: B — 2 A. Ohm’s law is V = IR. Rearranging gives I = V/R = 6/3 = 2 amperes.

Question 19 (Physics • Y11). Which expression describes the kinetic energy of an object?

A. mv   |   B. mg   |   C. ½mv²   |   D. ma

Answer: C — ½mv². Kinetic energy for translational motion is half the object’s mass multiplied by the square of its speed, ½mv².

Question 20 (Environmental science • Y10). Annual rainfall is 550 mm this year and 600 mm next year. What is the increase?

A. 150 mm   |   B. 1,150 mm   |   C. 5 mm   |   D. 50 mm

Answer: D — 50 mm. Subtract the first annual total from the second: 600 − 550 = 50 millimetres. Compare like units.

A clear approach for the next official ASO cycle

When	What to do	Helpful reminder
Before a new registration announcement	Ask an Australian Science teacher about senior ASO or JSO suitability and request ASI programme updates.	Avoid using past March or July dates as future dates.
When dates are published	Check school access to the ASI Teacher Portal, eligibility, costs, supervision and exam mode.	Keep registration separate from self-study materials.
During preparation	Study authentic ASI syllabuses and free past papers, plus foundational chapters and worked examples.	Review misconceptions rather than memorising answer letters.
After the actual examination	Ask the school for ASI’s official results/certificate instructions and any selection notice.	No automatic cash prize, team place or scholarship should be assumed.

Frequently asked questions about ASO registration and results

Are Australian Science Olympiad exams open for registration now?

No. ASI reports that the 2026 Australian Science Olympiad exams have concluded and 2026 registrations are closed. As of 18 October 2026, do not assume that the 2027 dates and registrations are already announced. A teacher can request access to the ASI Teacher Portal and follow its updates.

How does a school register students for ASO?

A teacher or authorised facilitator at an Australian school, registered home school or distance education provider requests or uses an ASI Teacher Portal account, then registers pupils when the window opens. Students cannot apply directly as individuals or through tutoring centres.

What age and school year can take an ASO exam?

ASI describes these as challenging Australian high-school exams, ideally Years 9–12. Later ASO Summer School has stricter citizenship, residency and age/completion requirements. There is no general official ASO exam for Classes 1–4.

What is the 2026 Australian Science Olympiad exam fee?

ASI’s official 2026 fee was A$22 including GST per student per exam. That amount belongs to the completed 2026 cycle; it must not be quoted as a confirmed 2027 price. ASI lists a separate cost and potential financial support for invited Summer School attendance.

Were all four ASO exams online in 2026?

No. Physics was pen-and-paper in 2026. Biology, Chemistry and Earth and Environmental Science were school-supervised device-based exams using ASI’s assessment platform. Teachers should verify the delivery mode again for the next year.

When and where will results and certificates appear?

ASI says it notifies teachers and facilitators when official reports and certificates become available for download through the ASI Teacher Portal. It has not guaranteed the old blog’s ‘within two weeks’ deadline. Selected students are contacted directly about Summer School opportunities.

Is there a minimum score to qualify for ASO Summer School?

There is no fixed universal pass mark. ASI invites selected exemplary performers subject to eligibility and programme decisions. Even a high mark on a past paper does not guarantee an invitation.

What is the actual route to an Australian international Science Olympiad team?

Eligible students first sit the relevant ASO Exam, some are selected to ASO Summer School, and a smaller group may progress through further training and selection. For international representation, ASI also lists citizenship, passport, university and age conditions. SCO participation is not an alternative qualification path.

Can students studying outside Australia register through School Connect?

No. Australian Science Innovations does not currently accept ASO entries from overseas schools, even when a student is an Australian citizen studying abroad. SCO is independent and cannot submit students for official ASI national-team selection. ASI suggests considering its separate international Big Science Competition when appropriate.

Which genuine past papers should students use?

ASI provides free official Biology, Chemistry, Earth and Environmental Science and Physics ASO past exam papers with answers. Its JSO archive separately supplies junior papers. ASI’s Olympiads Online also offers official free practice; the twenty exercises in this guide are original educational examples.

Are SCO chapter-wise Science lessons, videos and practice questions free?

Yes. School Connect Olympiad’s chapter-wise learning materials, linked educational videos and practice questions are free and continuously updated. This is separate from any ASI examination entry and is not an official ASO preparatory partnership.

What prizes or scholarships do ASO participants receive?

ASI explains that students can receive a certificate indicating performance and that selected students may be invited to Summer School. Do not expect the old blog’s invented A$500 and A$300 cash prizes, a guaranteed medal, a guaranteed scholarship or automatic university entry.

Follow Australian Science Innovations for official decisions

A student can begin strengthening Science reasoning at any time, and free School Connect chapter-wise learning materials, linked educational videos and practice questions can be one optional way to develop confidence. But the actual Australian Science Olympiads are organised by ASI. For entry, eligibility, fees, exam mode, results and team invitations, use the official ASI programme page and a qualifying Australian school facilitator. In October 2026, the completed 2026 cycle is history; confirm any later-year details when ASI publishes them.