Career upgrade: Learn practical AI skills for better jobs and higher pay.
Level up
PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free ICAS Science Practice Questions

Pass your International Competitions and Assessments for Schools - Science exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free
1 / 100
Question 1
Score: 0/0

A student wants to measure 30 millilitres of liquid as accurately as possible. Which piece of equipment is most suitable?

A
B
C
D
to track
Same family resources

Explore More ICAS International School Assessments

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

ICAS English

Practice Questions

ICAS Mathematics

Practice Questions
2026 Statistics

Key Facts: ICAS Science Exam

Years 2-12

ICAS Science is offered from the Introductory paper to Year 12

ICAS Assessments subject page

5 skill areas

Observing, interpreting, predicting, investigating, reasoning

Reach and ICAS Science framework

Mainly multiple choice

Stimulus-based items with some technology-enhanced formats online

ICAS Assessments subject page

No pass mark

Performance recognised by certificate and rank, not a cutoff

Common questions about ICAS

Run by Janison

ICAS Assessments, formerly UNSW Global, owns and runs ICAS

ICAS Assessments homepage

100

Original practice questions in this bank

OpenExamPrep

ICAS Science is an international, mainly multiple-choice school competition assessing scientific reasoning for Years 3-10 across physical, life and earth and space science. There is no pass mark; students earn certificates by rank. This bank provides 100 original practice questions on data interpretation, experimental design and scientific reasoning.

Sample ICAS Science Practice Questions

Try these sample questions to test your ICAS Science exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A student records the temperature of a cup of hot water every two minutes and plots the results on a line graph. The line falls quickly at first, then more slowly, and finally becomes almost flat. What does the flattening of the line most likely show?
A.The water is approaching the temperature of the surrounding room
B.The thermometer has stopped working
C.The water is gaining heat from the air
D.The water is starting to boil again
Explanation: Hot water cools fastest when the difference between its temperature and the room is largest. As the water nears room temperature the rate of cooling slows, so the line flattens. This is a standard interpretation of a cooling curve.
2In a food web, grass is eaten by rabbits, rabbits are eaten by foxes, and foxes have no predators shown. If a disease suddenly kills most of the rabbits, what is the most likely short-term effect?
A.The number of foxes will decrease because they have less food
B.The amount of grass will decrease
C.The number of foxes will increase rapidly
D.The grass will become extinct
Explanation: Foxes depend on rabbits as their food source in this web. If most rabbits die, foxes have less to eat and their numbers are likely to fall. This is reasoning about energy flow through a food web.
3A student wants to test whether plants grow taller with more sunlight. She puts one plant on a sunny windowsill and one in a dark cupboard. To make this a fair test, what must she keep the same for both plants?
A.The amount of water, type of plant and size of pot
B.The amount of sunlight each receives
C.The colour of each pot only
D.Nothing, the test is already fair
Explanation: In a fair test, only the variable being tested (sunlight) should differ. Everything else, such as water, plant type and pot size, must be kept the same so any difference in growth can be linked to sunlight.
4The table shows how far a toy car travels down ramps set at different angles. Ramp at 10 degrees: 50 cm. Ramp at 20 degrees: 90 cm. Ramp at 30 degrees: 130 cm. Based on the pattern, how far would the car most likely travel from a ramp at 40 degrees?
A.About 170 cm
B.About 100 cm
C.Exactly 130 cm
D.Less than 50 cm
Explanation: Each 10-degree increase in angle adds about 40 cm to the distance (50, 90, 130). Continuing this pattern, a 40-degree ramp would give roughly 130 + 40 = 170 cm. This is interpreting a numerical pattern in a table.
5Which of these is a property that would best help you sort materials into 'magnetic' and 'non-magnetic' groups?
A.Whether the material is attracted to a magnet
B.Whether the material floats in water
C.Whether the material is shiny
D.Whether the material is heavy
Explanation: Being attracted to a magnet is the defining property of a magnetic material. Sorting by this property directly separates magnetic from non-magnetic materials.
6A bar graph shows the rainfall in a town for each month. The tallest bars are in June and July, and the shortest are in December and January. What conclusion is best supported by the graph?
A.The town receives the most rain in mid-year and the least at the end of the year
B.It rains the same amount every month
C.The town never gets rain in summer
D.December is always the wettest month
Explanation: The tallest bars in June and July indicate the highest rainfall, while the shortest bars in December and January show the lowest. The graph supports a mid-year peak and end-of-year low.
7A simple electrical circuit has a battery, wires and one light bulb that is glowing. A student adds a second identical bulb in series with the first. What is most likely to happen to the brightness of the original bulb?
A.It becomes dimmer because the current through it decreases
B.It becomes brighter because there are more bulbs
C.It goes out completely and cannot be relit
D.It stays exactly the same brightness
Explanation: Adding a second bulb in series increases the total resistance, which reduces the current flowing through the circuit. With less current, the original bulb glows more dimly.
8Which of the following is the best example of a living thing responding to a change in its environment?
A.A plant bending toward a window to face the light
B.A rock rolling down a hill in the rain
C.A puddle drying up on a hot day
D.A metal gate rusting over time
Explanation: Responding to the environment is a characteristic of living things. A plant bending toward light shows a response to a stimulus, which non-living things cannot do.
9A student measures the mass of a candle before lighting it and again after it has burned for ten minutes. The mass after burning is less than before. What is the best explanation?
A.Gases and water vapour produced by burning escaped into the air
B.Mass was destroyed and no longer exists
C.The candle gained energy and lost weight as a result
D.The balance must have broken during the experiment
Explanation: When a candle burns, the wax reacts with oxygen and produces carbon dioxide and water vapour that escape into the air. The remaining candle is lighter because matter left as gas, in line with conservation of mass.
10The Moon appears to change shape over a month, showing phases such as crescent, half and full. What causes these phases?
A.We see different amounts of the Moon's sunlit side as it orbits Earth
B.The Earth's shadow covers part of the Moon each night
C.The Moon produces its own light that gets brighter and dimmer
D.Clouds block different parts of the Moon
Explanation: The Moon does not make its own light; it reflects sunlight. As the Moon orbits Earth, we see varying portions of its sunlit half, producing the phases.

About the ICAS Science Exam

ICAS Science is a long-running international school competition run by Janison (ICAS Assessments) for students from around Year 3 to Year 10 and beyond. Rather than testing memorised facts alone, it assesses scientific thinking through five skill areas: observing and measuring, interpreting data, predicting and concluding, investigating, and reasoning and problem solving. Questions use real scientific stimulus such as diagrams, graphs and tables drawn from physical science, life science (biology and ecology) and earth and space science. This question bank is not a released ICAS paper; it is an original Years 3-10 practice set written to build familiarity with the stimulus-based, reasoning-focused style of ICAS Science.

Assessment

This practice bank contains 100 original multiple-choice questions. Official ICAS Science papers are graded by year level (Introductory through Paper J) with mainly multiple-choice and technology-enhanced items built around real scientific stimulus.

Time Limit

Official sitting times vary by paper level, commonly around 45 minutes for lower primary papers and up to about an hour for upper primary and secondary papers.

Passing Score

No fixed pass mark. Students earn a certificate (Participation, Credit, Merit, Distinction or High Distinction) based on how they rank against others at the same year level.

Exam Fee

ICAS sitting fees are set per subject and vary by country and school; families register and pay through their participating school's ICAS shop or coordinator. (Janison (ICAS Assessments, formerly UNSW Global), conducted through participating schools)

ICAS Science Exam Content Outline

20 practice questions

Observing and measuring

Questions practise reading instruments, choosing suitable equipment, recording measurements with units, and making careful observations across physical, life and earth science contexts.

20 practice questions

Interpreting data

Stimulus-based questions practise reading line graphs, bar graphs, pie charts and tables, spotting patterns and trends, and extracting meaning from scientific data.

20 practice questions

Predicting and concluding

Questions practise using evidence to make predictions, drawing valid conclusions, making inferences, and judging whether a claim is supported by the observations.

20 practice questions

Investigating

Questions practise fair-test design, identifying independent and dependent variables, using controls, assessing reliability, and choosing how to collect and display data.

20 practice questions

Reasoning and problem solving

Questions apply science knowledge across physical science, life science and earth and space science, using logical reasoning to solve unfamiliar, real-world problems.

How to Pass the ICAS Science Exam

What You Need to Know

  • Passing score: No fixed pass mark. Students earn a certificate (Participation, Credit, Merit, Distinction or High Distinction) based on how they rank against others at the same year level.
  • Assessment: This practice bank contains 100 original multiple-choice questions. Official ICAS Science papers are graded by year level (Introductory through Paper J) with mainly multiple-choice and technology-enhanced items built around real scientific stimulus.
  • Time limit: Official sitting times vary by paper level, commonly around 45 minutes for lower primary papers and up to about an hour for upper primary and secondary papers.
  • Exam fee: ICAS sitting fees are set per subject and vary by country and school; families register and pay through their participating school's ICAS shop or coordinator.

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

ICAS Science Study Tips from Top Performers

1Practise reading graphs, tables and diagrams closely, then state the exact data point or trend that supports each answer.
2For investigation questions, identify what is being changed (independent variable), what is measured (dependent variable) and what must be kept the same.
3Learn to spot a fair test and a control group; many ICAS questions reward clear experimental-design reasoning.
4Review core ideas across physical science, life science and earth and space science so you can reason about unfamiliar scenarios.
5When a result looks unusual, ask whether it could be an error or outlier before drawing a conclusion.
6Work through stimulus-based questions under light time pressure to build the quick reading-and-reasoning habit ICAS uses.

Frequently Asked Questions

Who sits ICAS Science?

ICAS Science is an international school competition for students from around Year 2 (Introductory paper) up to Year 12. It is taken through participating schools, with papers graded by year level. This practice bank targets Years 3-10.

What skills does ICAS Science assess?

ICAS Science assesses five skill areas: observing and measuring, interpreting data, predicting and concluding, investigating, and reasoning and problem solving. These are tested across physical science, life science and earth and space science.

Is ICAS Science multiple choice?

ICAS Science is mainly multiple choice, with some technology-enhanced item types such as drag-and-drop and hot-spot in the online format. Questions are built around real scientific stimulus including diagrams, graphs and tables.

Is there a pass mark for ICAS Science?

No. ICAS does not have a fixed pass mark. Students receive a certificate such as Participation, Credit, Merit, Distinction or High Distinction based on how they rank against other students at the same year level.

How long is the ICAS Science test?

Sitting times vary by paper level. Lower primary papers are commonly around 45 minutes, while upper primary and secondary papers can run up to about an hour. Check your school's ICAS information for the exact time for your year level.

Are these official ICAS Science questions?

No. These are original practice questions written to match the skill areas and stimulus-based reasoning style of ICAS Science. They do not copy official ICAS papers or released sample items.