Science · Year 8

Lesson 1

Learn the three ideas of cell theory and trace how two centuries of microscope evidence built them.

⏱ 18 min · 8 questions

Lesson 2

Name the parts of a compound light microscope and follow the correct, safe sequence for focusing on a specimen.

⏱ 18 min · 8 questions

Lesson 3

Calculate total magnification, convert between millimetres and micrometres, and estimate the real size of cells from a field of view.

⏱ 20 min · 9 questions

Lesson 4

Identify the nucleus, cytoplasm, cell membrane and mitochondria in animal cells and describe what each structure does.

⏱ 17 min · 8 questions

Lesson 5

Identify the cell wall, chloroplasts and large vacuole in plant cells and compare plant cells with animal cells.

⏱ 18 min · 8 questions

Lesson 6

Match the major organelles to their functions and explain how they work together to keep a cell alive.

⏱ 18 min · 8 questions

Lesson 7

Compare bacterial cells with plant and animal cells and classify cells by whether they have a nucleus.

⏱ 18 min · 8 questions

Lesson 8

Distinguish single-celled from multicellular organisms and explain how each carries out the processes of life.

⏱ 18 min · 8 questions

Lesson 9

Explain how the structures of nerve, red blood, root hair, guard and other specialised cells suit their functions.

⏱ 19 min · 8 questions

Lesson 10

Explain how substances move into and out of cells by diffusion and osmosis and predict the direction of movement.

⏱ 20 min · 9 questions

Lesson 11

Use the hierarchy of cell, tissue, organ, organ system and organism to order and classify examples from plants and animals.

⏱ 17 min · 8 questions

Lesson 12

Write testable ‘If… then… because…’ hypotheses that link an independent variable to a measurable dependent variable.

⏱ 18 min · 8 questions

Lesson 13

Trace a meal organ by organ, separating mechanical digestion, chemical digestion and absorption at each stage.

⏱ 19 min · 8 questions

Lesson 14

Discover how enzymes act as biological catalysts and match each digestive enzyme to the nutrient it breaks down.

⏱ 18 min · 8 questions

Lesson 15

Trace blood through the double circulation and compare the structure of arteries, veins and capillaries.

⏱ 19 min · 8 questions

Lesson 16

Identify red cells, white cells, platelets and plasma, and explain how each is adapted to its role.

⏱ 17 min · 7 questions

Lesson 17

Follow air to the alveoli and explain how their structure makes gas exchange with the blood fast and efficient.

⏱ 18 min · 8 questions

Lesson 18

Learn the word equation for aerobic respiration and explain how three body systems deliver its reactants and remove its products.

⏱ 18 min · 8 questions

Lesson 19

Explain how the kidneys filter the blood to remove urea and excess water, and identify the parts of the urinary system.

⏱ 18 min · 8 questions

Lesson 20

Explain how bones, joints and antagonistic muscle pairs work together to produce movement.

⏱ 18 min · 8 questions

Lesson 21

Explain how xylem and phloem move water and sugars through a plant and how stomata control gas exchange.

⏱ 19 min · 8 questions

Lesson 22

Explain how the circulatory, respiratory, muscular, nervous and other systems interact during exercise.

⏱ 18 min · 8 questions

Lesson 23

Explore how X-rays, pacemakers, dialysis and cochlear implants have advanced our understanding and treatment of body systems.

⏱ 18 min · 8 questions

Lesson 24

Describe trends, read values and calculate changes and rates from a line graph of heart rate during and after exercise.

⏱ 19 min · 9 questions

Lesson 25

Use particle arrangement, motion and attraction to explain why solids, liquids and gases behave so differently.

⏱ 18 min · 8 questions

Lesson 26

Link temperature to particle kinetic energy and use it to explain diffusion rates and gas pressure.

⏱ 18 min · 7 questions

Lesson 27

Explain melting, boiling, condensing, freezing and sublimation with particles, and read the flat sections of a heating curve.

⏱ 19 min · 8 questions

Lesson 28

Explain thermal expansion with particle spacing and apply it to bridges, rail lines, thermometers and thermostats.

⏱ 18 min · 8 questions

Lesson 29

Explain density with particle packing and calculate it from mass and volume, including by water displacement.

⏱ 19 min · 8 questions

Lesson 30

Learn that each element is made of one type of atom and read element symbols and information from the periodic table.

⏱ 17 min · 8 questions

Lesson 31

Compare the properties of metals, non-metals and metalloids and classify elements by properties and position in the periodic table.

⏱ 18 min · 8 questions

Lesson 32

Untangle the terms atom, molecule, element and compound, and classify substances from particle diagrams.

⏱ 18 min · 8 questions

Lesson 33

Decode chemical formulas, including subscripts, brackets and coefficients, and count the atoms they represent.

⏱ 18 min · 8 questions

Lesson 34

Use particle rearrangement to decide whether a new substance forms, and see why atoms and mass are conserved in reactions.

⏱ 19 min · 8 questions

Lesson 35

Interpret observations such as gas, colour change, precipitates and energy changes as evidence of chemical change.

⏱ 18 min · 8 questions

Lesson 36

Distinguish reactions that release energy from those that absorb it, and classify reactions from temperature data.

⏱ 19 min · 8 questions

Lesson 37

Link the processes that turn igneous, sedimentary and metamorphic rocks into one another, and the very different timescales they work on.

⏱ 18 min · 8 questions

Lesson 38

Explain how igneous rocks form from magma and lava and use crystal size to work out how quickly and where they cooled.

⏱ 18 min · 8 questions

Lesson 39

Explain how sedimentary rocks build up in layers and preserve fossils, and use the principle of superposition to put events in order.

⏱ 19 min · 8 questions

Lesson 40

Explain how heat and pressure transform existing rocks without melting them, and match metamorphic rocks to their parent rocks.

⏱ 17 min · 8 questions

Lesson 41

Distinguish physical, chemical and biological weathering from erosion and deposition, and identify them in Australian landscapes.

⏱ 19 min · 8 questions

Lesson 42

Explore how minerals are found, mined and processed in Australia, and weigh up their economic benefits against environmental and cultural impacts.

⏱ 19 min · 8 questions

Lesson 43

Distinguish kinetic energy from gravitational, elastic and chemical potential energy, and calculate how much energy objects store or carry.

⏱ 19 min · 8 questions

Lesson 44

Distinguish energy transfers from energy transformations and describe the energy chains inside everyday devices and power stations.

⏱ 18 min · 8 questions

Lesson 45

Read and construct Sankey diagrams to show the useful and wasted energy outputs of a device, and use them to calculate missing values.

⏱ 18 min · 8 questions

Lesson 46

Apply the law of conservation of energy and calculate the percentage efficiency of devices to compare how well they use energy.

⏱ 19 min · 8 questions

Lesson 47

Distinguish reliability, validity, accuracy and precision, and suggest specific improvements to a described investigation.

⏱ 18 min · 8 questions

Lesson 48

Judge the credibility of websites, news reports and studies by checking author expertise, the evidence behind claims and possible bias.

⏱ 19 min · 8 questions