Science · Year 7

Lesson 1

Discover why scientists sort the millions of living things on Earth into groups, and practise classifying organisms by their observable features.

⏱ 16 min · 8 questions

Lesson 2

Learn the ranks of classification from kingdom to species and place familiar organisms at each level.

⏱ 18 min · 8 questions

Lesson 3

Learn how every species gets a two-part scientific name and practise reading and writing these names correctly.

⏱ 16 min · 8 questions

Lesson 4

Meet the five kingdoms of life and use key features such as cell type and nutrition to assign organisms to a kingdom.

⏱ 18 min · 8 questions

Lesson 5

Use and build branching dichotomous keys to identify unfamiliar Australian organisms step by step.

⏱ 20 min · 8 questions

Lesson 6

Explore the main invertebrate groups — arthropods, molluscs, annelids and cnidarians — and classify animals by their body features.

⏱ 18 min · 8 questions

Lesson 7

Move beyond single food chains to build and interpret food webs with many interconnected feeding relationships.

⏱ 18 min · 8 questions

Lesson 8

Learn how energy moves through trophic levels and why only about 10% passes from one level to the next.

⏱ 20 min · 8 questions

Lesson 9

See how decomposers recycle nutrients and why matter cycles through ecosystems while energy flows one way.

⏱ 17 min · 8 questions

Lesson 10

Predict how adding or removing a species, such as an introduced predator, ripples through the populations in a food web.

⏱ 20 min · 8 questions

Lesson 11

Explore how Aboriginal and Torres Strait Islander Peoples classify and track living things through seasonal calendars, and link this knowledge to food webs.

⏱ 18 min · 8 questions

Lesson 12

Learn to tell testable questions from non-testable ones and rewrite general questions into questions you can investigate.

⏱ 17 min · 8 questions

Lesson 13

Learn what makes a substance scientifically pure and practise classifying everyday materials as pure substances or mixtures.

⏱ 17 min · 8 questions

Lesson 14

Use the particle model to draw and interpret diagrams of elements, compounds and mixtures.

⏱ 17 min · 9 questions

Lesson 15

Learn the language of dissolving and identify the solute and solvent in everyday solutions.

⏱ 16 min · 9 questions

Lesson 16

Compare dilute, concentrated and saturated solutions, calculate concentration and read solubility graphs.

⏱ 19 min · 9 questions

Lesson 17

Distinguish solutions, suspensions and colloids by particle size and behaviour, and classify everyday examples.

⏱ 17 min · 9 questions

Lesson 18

Explain how filtration and decanting separate mixtures using differences in particle size and density.

⏱ 17 min · 9 questions

Lesson 19

Recover a dissolved solid from a solution by evaporation or crystallisation, and decide which method suits the job.

⏱ 17 min · 9 questions

Lesson 20

Learn how distillation separates liquids by boiling point and practise labelling and sequencing a distillation setup.

⏱ 18 min · 9 questions

Lesson 21

Separate the dyes in inks and food colourings with paper chromatography and interpret chromatograms to identify them.

⏱ 18 min · 9 questions

Lesson 22

Select the best separation technique, including magnetism and centrifuging, by comparing the properties of the substances in a mixture.

⏱ 18 min · 9 questions

Lesson 23

Apply separation techniques to explain how Australian drinking water and wastewater are treated.

⏱ 19 min · 9 questions

Lesson 24

Identify independent, dependent and controlled variables in experiments and explain what makes a test fair.

⏱ 17 min · 9 questions

Lesson 25

Tell Earth's spin on its axis apart from its journey around the Sun, and link each motion to the length of a day and a year.

⏱ 17 min · 8 questions

Lesson 26

Explain how Earth's tilted axis changes the angle and duration of sunlight to cause the seasons — and why distance from the Sun is not the reason.

⏱ 19 min · 8 questions

Lesson 27

Use the positions of the Sun, Earth and Moon to explain why the Moon's shape seems to change and put the phases in order.

⏱ 18 min · 8 questions

Lesson 28

Explain the Sun–Earth–Moon alignments that cause solar and lunar eclipses and predict which Moon phase each can happen at.

⏱ 18 min · 8 questions

Lesson 29

Explain how the gravity of the Moon and Sun causes high, low, spring and neap tides, and read a tide chart.

⏱ 19 min · 8 questions

Lesson 30

Explore how Aboriginal and Torres Strait Islander Peoples use observations of the Sun, Moon and stars to predict tides, seasons and food availability.

⏱ 18 min · 8 questions

Lesson 31

Trace water through Earth's reservoirs and the processes, such as transpiration, infiltration and run-off, that move it between them.

⏱ 19 min · 8 questions

Lesson 32

Classify Earth resources by how quickly they are replenished and practise justifying each classification.

⏱ 17 min · 8 questions

Lesson 33

Discover how coal, oil and natural gas formed from ancient living things over millions of years and why this makes them non-renewable.

⏱ 18 min · 8 questions

Lesson 34

Examine where Australia's water comes from and how it is used, and evaluate ways to manage water on a dry continent.

⏱ 19 min · 9 questions

Lesson 35

Weigh the benefits and impacts of extracting and using resources such as minerals, soil and fuels, and evaluate ways to use them more sustainably.

⏱ 18 min · 8 questions

Lesson 36

Record data in well-organised tables, choose between column and line graphs, and read values accurately from them.

⏱ 18 min · 9 questions

Lesson 37

Describe forces as pushes and pulls with both a size and a direction, and draw and read force arrow diagrams.

⏱ 17 min · 8 questions

Lesson 38

Combine the forces on an object to find the net force, and use it to predict whether the object's motion will change.

⏱ 18 min · 9 questions

Lesson 39

Explore how the size of the net force and the mass of an object decide how quickly its motion changes.

⏱ 18 min · 8 questions

Lesson 40

Understand gravity as a force of attraction between all masses, and describe its effects on Earth and out in space.

⏱ 17 min · 8 questions

Lesson 41

Distinguish mass in kilograms from weight in newtons, and calculate weight on Earth and the Moon using W = mg.

⏱ 18 min · 8 questions

Lesson 42

Explain friction as a contact force that opposes motion, and decide when it is useful and when it is a problem.

⏱ 17 min · 8 questions

Lesson 43

Explore drag forces in air and water, and predict how shape, size and speed change how much resistance an object meets.

⏱ 18 min · 8 questions

Lesson 44

Classify forces as contact or non-contact, including magnetic and electrostatic forces, and spot them in everyday situations.

⏱ 17 min · 8 questions

Lesson 45

See how levers and other simple machines trade force for distance, calculate mechanical advantage and identify the three classes of lever.

⏱ 19 min · 8 questions

Lesson 46

Choose suitable instruments and units, read scales accurately, and tell random errors from systematic errors.

⏱ 18 min · 8 questions

Lesson 47

Understand why scientists repeat trials, and practise calculating averages, finding the range and spotting outliers.

⏱ 17 min · 9 questions

Lesson 48

Judge whether a claim is supported by evidence by checking the sample size, whether the test was fair and how reliable the source is.

⏱ 19 min · 8 questions