Science for Kids
Science helps us understand how the world works, from the tiny atoms in everything to the huge planets in space. These lessons explain each idea with simple words, real-life examples, a fun fact and a quiz.
All 64 Science topics
Gravity
Gravity is the invisible force that pulls objects toward each other.
Photosynthesis
Plants make their own food using sunlight, water and carbon dioxide.
The Water Cycle
Water evaporates, rises, condenses into clouds, then falls as rain or snow.
States of Matter
Matter is mostly solid, liquid or gas.
The Solar System
Eight planets orbit the Sun.
The Heart
Your heart is a muscle that pumps blood around your body.
Electricity
Electricity is the flow of tiny charged particles through a circuit.
Magnets
Magnets attract iron, nickel and cobalt.
Volcanoes
Volcanoes erupt when hot melted rock called magma rises up through cracks in Earth's crust.
Weather
Weather is what the atmosphere is doing right now: sunny, rainy, windy or snowy.
Sound
Sound is made by vibrations that travel through air as waves.
Light and Shadows
Light travels in straight lines.
Rainbows
Sunlight is made of many colours.
Simple Machines
Simple machines like levers, wheels, ramps and pulleys make work easier by changing the size or direction of a force.
Levers and Pulleys
A lever turns around a fixed point called a fulcrum.
Friction
Friction is the force that slows things down when surfaces rub together.
Forms of Energy
Energy comes in many forms: heat, light, sound, movement and electrical.
Atoms
Everything is made of tiny particles called atoms.
Elements and the Periodic Table
An element is a pure substance made of one kind of atom, like gold, oxygen or carbon.
Acids and Bases
Acids taste sour, like lemon juice, and bases feel slippery, like soap.
Mixtures and Solutions
In a mixture, substances are combined but can be separated.
Chemical Reactions
In a chemical reaction, substances change into new ones.
The Skeleton
An adult human has 206 bones.
Muscles
Muscles pull on bones to make you move.
Digestion
Digestion breaks food into tiny pieces your body can use.
Lungs and Breathing
When you breathe in, your lungs take in oxygen.
The Brain
The brain controls everything you think, feel and do.
The Five Senses
We have five senses: sight, hearing, smell, taste and touch.
Blood
Blood carries oxygen and nutrients around your body.
Cells
Cells are the tiny building blocks of all living things.
DNA and Genes
DNA is a code inside your cells that holds instructions for how your body grows.
Evolution
Over many generations, living things change slowly.
Fossils
Fossils are the remains or traces of ancient living things preserved in rock.
Rocks and Minerals
There are three types of rock: igneous, sedimentary and metamorphic.
Earthquakes
Earth's crust is split into huge plates.
Newton's Laws of Motion
Sir Isaac Newton described three rules for how things move.
Inertia
Inertia is the tendency of an object to resist any change in its motion.
Speed and Velocity
Speed tells you how fast something moves.
Density
Density compares how much mass is packed into a space.
Buoyancy
Buoyancy is the upward push that a liquid or gas gives to an object placed in it.
Air Pressure
Air pressure is the force of air molecules pushing on everything.
Heat and Temperature
Temperature measures how hot or cold something is.
Conduction, Convection and Radiation
Heat moves in three ways.
Conductors and Insulators
Materials that let heat or electricity pass through easily are conductors.
Static Electricity
Static electricity builds up when electrons move from one object to another, often by rubbing.
Electric Circuits
An electric circuit is a loop that lets electricity flow from a battery, through wires and components, and back again.
Chemical Energy
Chemical energy is stored inside substances such as food, fuel and batteries.
Waves
Waves carry energy from one place to another without carrying matter with them.
Reflection of Light
Reflection happens when light bounces off a surface.
Refraction of Light
Refraction is the bending of light as it passes from one material into another, such as from air into water.
Lenses
A lens is a piece of clear glass or plastic that bends light to make things look bigger or smaller.
Plant Parts
Most plants have roots that hold them in soil and take in water, a stem that supports the leaves, leaves that make food, and flowers that…
Seeds and Germination
A seed contains a tiny plant and stored food.
Bacteria
Bacteria are tiny living things made of just one cell.
Viruses
A virus is a tiny particle that needs a living cell to make copies of itself.
The Carbon Cycle
Carbon moves between air, plants, animals, oceans and rocks in a continuous cycle.
Melting and Freezing
Melting happens when a solid turns into a liquid after it is heated.
Evaporation and Boiling
Evaporation is when a liquid slowly turns into a gas at any temperature.
Erosion and Weathering
Weathering breaks rocks into smaller pieces.
The Immune System
Your immune system is a team of cells and organs that protects your body from germs.
Hormones
Hormones are chemical messengers made by glands that travel in the blood.
How Your Eyes Work
Light enters the eye through the cornea and the lens, then lands on the retina at the back.
Chromosomes
Chromosomes are long threads of DNA packed tightly inside the nucleus of a cell.
Microorganisms
Microorganisms are living things too small to see without a microscope.
Frequently asked questions about Science
What is science for kids?
Science is the study of the world around us. Scientists ask questions, make observations, test ideas with experiments and learn from the results.
How can I learn science at home?
Try simple experiments with things you have at home, such as dropping objects to test gravity or mixing water and salt. Always ask an adult before trying anything new.
Are these science lessons suitable for 10-year-olds?
Yes. Each lesson uses everyday language and examples, and the quizzes check the main idea of the topic.