Work in progress. Play With Science is still being built. New lessons are added every day, and some chapters and classes are not ready yet.

Play With Science

One playful lesson for every principle in your NCERT science book, in book order.

Chapter 1 The Wonderful World of Science

1 What science is Science is everywhere 2 New discoveries change our understanding The puzzle that never ends 3 The scientific method Solve the pen mystery

Chapter 2 Diversity in the Living World

1 Biodiversity Spot the variety 2 Plants and animals depend on each other Take one away 3 Grouping living things Same animals, new groups 4 Trees, shrubs and herbs Tree, shrub or herb? 5 Climbers and creepers Take the stick away 6 Leaf venation Read the veins 7 Taproots and fibrous roots Pull it up and look 8 Dicots and monocots Split the seed 9 Venation, roots and cotyledons go together Three clues, one family 10 Grouping animals On the move 11 Biodiversity varies with conditions Three places, three sets of life 12 Adaptations Built for the place 13 Habitat Find the home 14 Terrestrial and aquatic habitats Land, water, or both? 15 Habitat damage causes biodiversity loss When the home is damaged

Chapter 3 Mindful Eating: A Path to a Healthy Body

1 Carbohydrates Refuel the runner 2 Fats and energy-giving foods The winter laddoo 3 Proteins are body-building foods Building a body 4 Vitamins and their deficiency diseases The vitamin clinic 5 Minerals and their deficiency diseases The mineral clinic 6 Nutrients Nutrient or not? 7 Protective nutrients A plate that protects 8 Cooking and washing lose nutrients Where do vitamins go? 9 Dietary fibres (roughage) A smooth passage 10 Water in our diet What water does 11 Test for starch The starch test 12 Test for fats The oily patch 13 Test for proteins The violet test 14 A food can contain several nutrients More than one nutrient 15 Nutrient needs vary between people Not the same plate 16 Balanced diet The balanced plate 17 Junk food Junk food 18 Millets are nutri-cereals Nutri-cereals

Chapter 4 Exploring Magnets

1 Natural and artificial magnets Found or made? 2 Magnetic and non-magnetic materials Will it stick? 3 Poles of a magnet Where does it pull most? 4 Poles always exist in pairs Chop the magnet 5 A suspended magnet rests north-south The hanging magnet 6 Testing whether a metal is a magnet Magnet or just iron? 7 Magnetic compass Build a compass 8 Finding directions with a compass Which way is east? 9 Like poles repel, unlike poles attract Push or pull? 10 Repulsion identifies a magnet The sure test 11 Magnetic effect acts through materials Through the wall 12 Magnets act without touching No hands!

Chapter 5 Measurement of Length and Motion

1 A measurement has a number and a unit 13 what? 2 Need for a standard unit Whose handspan? 3 SI units and the metre One unit for everyone 4 Relations between units of length How many in a kilometre? 5 Smallest length a scale can measure The smallest mark 6 The inch The other row of numbers 7 Choosing an appropriate scale The right scale for the job 8 Placing and reading the scale correctly Straight on, eye above 9 Measuring with a broken scale The broken scale 10 Writing units of length Writing a length the right way 11 Measuring a curved line Measuring a curved line 12 Reference point Measure from where? 13 Motion and rest In motion or at rest? 14 Rest and motion depend on reference point Rest or motion? It depends 15 Linear, circular and oscillatory motion Straight, round, to and fro 16 Periodic motion Again and again

Chapter 6 Materials Around Us

1 Materials What is it made of? 2 Classification Same things, different groups 3 Properties and purpose decide the material The right material for the job 4 Lustrous and non-lustrous materials Shiny or not? 5 Metals lose lustre in air and moisture Dull outside, shiny inside 6 Not everything shiny is a metal All that glitters 7 Hard and soft materials Press it 8 Transparent, translucent and opaque Can you see through it? 9 Soluble and insoluble materials Does it disappear? 10 Liquids and gases in water Mix or layer? 11 Mass Heavier or lighter? 12 Volume How much space? 13 Matter Is it matter? 14 SI units of mass and volume Units of mass and volume

Chapter 7 Temperature and its Measurement

1 Touch cannot judge hotness reliably Can your hand tell? 2 Temperature Hotter means higher 3 Clinical and laboratory thermometers Two kinds of thermometer 4 Digital clinical thermometer Inside a digital thermometer 5 Celsius scale Degrees Celsius 6 Normal body temperature is an average Is anyone exactly 37.0? 7 Armpit readings are lower Under the arm 8 Fahrenheit scale Another scale 9 Kelvin scale and the SI unit The scientists’ scale 10 Converting Celsius to Kelvin Celsius to kelvin 11 Writing temperature scales and units Write it right 12 Laboratory thermometer A thermometer, part by part 13 Range of a thermometer How far can it read? 14 Smallest value a thermometer reads The smallest step 15 Using a laboratory thermometer correctly Measure it right 16 Temperature stays constant while boiling or melting A flat line 17 Daily maximum and minimum air temperature Weather reports

Chapter 8 A Journey through States of Water

1 Ice and water are states of one substance One substance, two forms 2 Water vapour and steam Invisible vapour, visible steam 3 Evaporation Where did the water go? 4 Condensation Drops from the air 5 Three states of water Solid, liquid, gas 6 Solids keep their shape A solid keeps its shape 7 Liquids take the container's shape A liquid takes the shape 8 Gases spread to fill space A gas fills the space 9 Heating and cooling change state Heat it, cool it 10 Melting and freezing Melting and freezing 11 What changes the rate of evaporation The drying race 12 Evaporation causes cooling Evaporation cools 13 How clouds and rain form From vapour to rain 14 The water cycle The water cycle

Chapter 9 Methods of Separation in Everyday Life

1 Mixture Mix and separate 2 Handpicking Pick it out by hand 3 Threshing Beat the stalks 4 Winnowing Let the wind work 5 Sieving Through the holes 6 Evaporation to recover a dissolved solid Salt from seawater 7 Sedimentation and decantation Let it settle 8 Filtration Filter it 9 Choice of filter depends on particle size Pick the right filter 10 Churning Churn the curd 11 Magnetic separation Use a magnet

Chapter 10 Living Creatures: Exploring their Characteristics

1 Movement in living beings and plants Plants on the move 2 Insectivorous plants The plant that traps insects 3 Growth and the need for food Growing up 4 Breathing and respiration Breathe in, breathe out 5 Excretion Getting rid of waste 6 Stimulus and response Touch and respond 7 Reproduction New ones of the same kind 8 Death When life stops 9 Characteristics of living beings Is it living? 10 Water is needed for germination Seeds need water 11 Air and soil spaces for germination Room for air and roots 12 Light and germination Light or dark? 13 Roots grow down, shoots grow up Roots down, shoots up 14 Life cycle of a plant From seed to seed 15 Life cycle of a mosquito The mosquito’s four stages 16 Big changes between life stages Same animal, new look 17 Life cycle of a frog From spawn to frog

Chapter 11 Nature's Treasures

1 Living beings need oxygen Air we need 2 Wind Wind and breeze 3 Composition of air A mixture of gases 4 Most of Earth's water is saline Salty seas 5 Freshwater and its accessibility Freshwater: hard to reach 6 Sun is the main energy source Energy from the Sun 7 Forests A home in the forest 8 Life forms depend on each other Living things need each other 9 Roots hold the soil Roots hold the soil 10 Recycling in nature Leaves come back as soil 11 What soil contains What is in soil? 12 How soil is formed How soil is made 13 Rocks are made of minerals Rocks and minerals 14 Fossil fuels Fossil fuels 15 Natural and human-made resources Natural or human-made? 16 Renewable resources Renewable resources 17 Non-renewable resources Non-renewable resources

Chapter 12 Beyond Earth

1 Stars shine with their own light Stars make their own light 2 Constellations Constellations 3 Pole Star shows north The Pole Star 4 Not all stars visible everywhere Not seen from everywhere 5 The Sun is a star The Sun is a star 6 Distance changes apparent size Near looks big, far looks small 7 Stars are not seen by day No stars by day 8 Astronomical unit The astronomical unit 9 Rotation and a day Rotation makes a day 10 Planets and revolution Planets and revolution 11 Order of the planets Order of the planets 12 Inner and outer planets Inner and outer planets 13 Morning Star, Red Planet, Blue Planet Nicknames of planets 14 Distance and atmosphere set planet temperature Hot and cold planets 15 Telling planets from stars Planet or star? 16 Telescope Binoculars and telescopes 17 Satellites and moons Satellites and moons 18 The Moon The Moon 19 Craters on the Moon Craters on the Moon 20 Asteroids and the asteroid belt The asteroid belt 21 Comets Comets 22 The Solar System The Solar System 23 Other objects shine by reflected sunlight Borrowed light 24 The Milky Way Galaxy The Milky Way 25 Many galaxies in the Universe Many galaxies 26 Exoplanets Exoplanets
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