Science
Form 2 · 32 topics available
Chapter 1 · Biodiversity
Chapter 2 · Ecosystem
Energy Flow in an Ecosystem
Energy from the Sun passes through living things along food chains and food webs.
OpenNutrient Cycle in an Ecosystem
Nutrients such as carbon and water are used again and again as they cycle through nature.
OpenInterdependence and Interaction among Organisms and the Environment
Living things rely on each other and on their surroundings to survive together.
OpenRole of Humans in Maintaining a Balanced Nature
Human actions can harm or protect nature. We share the duty to keep ecosystems balanced.
OpenChapter 3 · Nutrition
Classes of Food
The seven classes of food and the nutrients each one gives your body.
OpenImportance of a Balanced Diet
Why eating the right amount of each food class keeps you healthy and active.
OpenHuman Digestive System
How the digestive system breaks food into small pieces the body can use.
OpenAbsorption, Transportation of Digested Food and Defecation
How digested food enters the blood, reaches cells, and how waste leaves the body.
OpenChapter 4 · Human Health
Chapter 5 · Water and Solution
Physical Characteristics of Water
Explore how water changes state, its special melting and boiling points, and why impurities alter these values.
OpenSolution and Rate of Solubility
Learn what a solution is, the meaning of solute and solvent, and the factors that speed up dissolving.
OpenWater Purification and Water Supply
Discover how dirty water is cleaned into safe drinking water and how it is supplied to our homes.
OpenChapter 6 · Acids and Alkalis
Chapter 7 · Electricity and Magnetism
Electricity
Learn what electric current, voltage and resistance are, and how Ohm's law links them: V = IR.
OpenElectric Current in Series and Parallel Circuits
Compare how current and voltage behave in series and parallel circuits, and why household wiring uses parallel.
OpenMagnetism
Explore magnets, magnetic poles and fields, and how an electric current can make a magnet: the electromagnet.
OpenChapter 8 · Force and Motion
Chapter 9 · Heat
Relationship between Temperature and Heat
Learn the difference between heat and temperature, their units, and how heat added raises temperature.
OpenHeat Flow and Thermal Equilibrium
Discover how heat flows by conduction, convection and radiation, and what thermal equilibrium means.
OpenExpansion and Contraction of Matter
Learn why matter expands when heated and contracts when cooled, and how this is used in daily life.
OpenSurface Type and Heat Absorption and Emission
Find out how dull black surfaces and shiny white surfaces differ in absorbing and giving out heat.
OpenChapter 10 · Sound Waves
Characteristics of Sound Waves
Sound is produced by vibrating objects and travels as a wave that needs a medium such as air, water or solids.
OpenLoudness and Pitch of Sound
Loudness depends on the amplitude of a sound wave, while pitch depends on its frequency.
OpenReflection of Sound Waves
When sound waves hit a hard surface they bounce back. This reflection produces echoes and is used to measure distances.
OpenChapter 11 · Stars and Galaxies in the Universe
Chapter 12 · The Solar System
Chapter 13 · Meteoroids, Asteroids and Comets
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