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Chapter-by-chapter notes written straight from the curriculum. Read free, then practise the same chapter with an AI-generated quiz.
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Learn why gases compress while solids will not, how particle motion decides whether a substance can flow, what happens to particles during melting and boiling, and how to predict a change of state.
Read articleLearn the everyday evidence that matter is made of tiny particles with gaps between them, see that those particles are atoms and molecules, compare the three states by particle attraction, and classify substances by arrangement.
Read articleLearn how uneven heating creates pressure differences and wind, why fast-moving air has lower pressure, how thunderstorms and lightning form and how to stay safe, and how a cyclone builds its eye.
Read articleLearn to calculate pressure in pascals, explain why straps are broad and knives are sharp, see how liquid pressure grows with depth, and find the evidence that air presses on everything around us.
Read articleLearn why mass and weight are different quantities, calculate weight in newtons from a given mass, compare upthrust with weight to decide floating or sinking, and explain why immersed objects feel lighter.
Read articleLearn what a force is and which direction it acts, predict how it changes speed, direction or shape, see why every force needs two interacting objects, and sort forces into contact and non-contact kinds.
Read articleLearn why a current-carrying wire gets hot, identify the appliances built on that effect, see how a voltaic cell turns chemical energy into electrical energy, and compare a dry cell with a rechargeable battery.
Read articleLearn the experiment that shows a current has a magnetic effect, predict how the needle moves when the current changes, build an electromagnet and control its strength, and see why devices prefer it to a permanent magnet.
Read articleLearn to sort diseases as communicable or non-communicable, trace the five routes germs travel, see how lifestyle causes diabetes and obesity, and understand vaccines, antibiotics and resistance.
Read articleLearn why health covers body, mind and society, judge a daily routine against diet, exercise, sleep and hygiene, see how clean water and sanitation protect a whole community, and read signs against symptoms.
Read articleLearn to classify microorganisms into four groups and see why viruses sit apart, follow their work as decomposers and nitrogen fixers, understand fermentation in curd and bread, and justify the cell as life's basic unit.
Read articleLearn to identify every part of a cell and what it does, compare plant and animal cells, see how a cell's shape suits its job, tell unicellular from multicellular life, and order the levels of organisation.
Read articleLearn to turn an everyday observation into a testable question, tell an observation apart from an inference, spot which factor was changed and which was measured, and see why repeated trials matter.
Read articleLearn to sort events as certain, impossible or likely, work out experimental probability from trial results, calculate theoretical probability from equally likely outcomes, and use the complement rule.
Read articleLearn to calculate the mean and work backwards to a missing observation, find the median for odd and even counts, identify one or more modes, and draw a bar graph to a sensible scale.
Read articleLearn the difference between raw and arrayed data, arrange observations in order, calculate the range in one subtraction, and build a frequency distribution table using tally marks.
Read articleLearn the area formulas for squares, rectangles, parallelograms, rhombuses and triangles, find the area of a circle and a ring, break shaded figures into simple shapes, and cost a path or a carpet.
Read articleLearn to find the perimeter of rectangles, squares and triangles, calculate circumference with pi as 22 by 7, recover dimensions from a perimeter and a ratio, and solve fencing and wheel problems.
Read articleLearn congruence by superimposition, write the vertex correspondence correctly, choose between SSS, SAS, ASA and RHS, and use c.p.c.t. to prove further results in a single step.
Read articleLearn to count faces, edges and vertices of common solids, verify Euler's formula and use it to find a missing number, test which nets fold into a cube, and draw solids to scale in two dimensions.
Read articleLearn to count lines of symmetry in shapes and letters, complete a figure from half of it, reflect points in the axes and the origin, and find the order of rotational symmetry.
Read articleLearn to state the Pythagoras theorem and spot the hypotenuse, find any missing side, test three lengths for a right angle with the converse, and solve ladder, diagonal and distance problems.
Read articleLearn to construct a triangle from three sides, from SAS and ASA, and in isosceles, equilateral and right-angled forms, then draw its circumcircle from perpendicular bisectors and its incircle from angle bisectors.
Read articleLearn to classify triangles by sides and angles, find unknown angles from a ratio using the angle sum, apply the exterior angle property, and use isosceles and equilateral angle rules.
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