Energy — How Things Work
Class 5 · The World Around Us
4 ideas in Class 5 The World Around Us, explained in plain words, with games and quizzes to practise.
Forms of Energy and Motion
Energy is what causes things to move, produce sounds, glow with light, warm up, or perform mechanical work.
Why it matters. Recognizing different forms of energy helps students understand everyday physical phenomena from moving toys to musical vibrations.
Try it in two minutes
- Release an inflated balloon to see how rushing air pushes the balloon forward.
- Pluck stretched rubber bands over a cardboard box to hear how vibrations create sound energy.
- Observe that sunlight warming a cup of water demonstrates radiant thermal heat energy.
- Understand that chemical energy is stored in batteries and within our own bodies for future use.
Try at home. Build a cardboard rubber-band guitar and pluck strings of different thicknesses to compare high and low sounds.
Fuels, Food, and Thermal Wisdom
Food provides chemical energy for living bodies, while fuels like LPG, petrol, and oil power cooking, transport, and heating.
Why it matters. Understanding fuels helps students evaluate clean versus polluting energy and appreciate ingenious traditional climate control.
Try it in two minutes
- Recognize that food is the primary fuel powering muscles and brain activity in all living beings.
- In an oil lamp (diya), oil acts as the liquid chemical fuel that sustains the burning flame.
- In cold Himalayan regions, keeping livestock on the ground floor naturally warms living quarters above.
- Traditional buildings used thick walls and compact windows to stay naturally cool in summer and warm in winter.
Try at home. With an adult, light two lamps—one with oil and one dry—to observe how fuel sustains illumination.
Electricity and Energy Efficiency
Electricity is a versatile energy carrier powering lights, fans, and factories, but using it efficiently and safely is vital.
Why it matters. Understanding energy efficiency helps save household electricity, while safety rules protect students from hazardous electrical shocks.
Try it in two minutes
- Observe that electricity can produce movement (fans), light (bulbs), sound (speakers), and cooling (refrigerators).
- Understand that LED bulbs are energy-efficient, providing bright light while consuming far less electrical wattage.
- Never poke fingers, pencils, or metal items into wall sockets, and never touch plugged-in wires with wet hands.
- Stay away from fallen power lines or open transformer boxes, and notify an adult immediately if hazards appear.
Try at home. Count the number of LED bulbs versus older tube lights or incandescent bulbs used across your home.
Renewable Energy and Sustainable Design
Clean energy harnessed from the sun, wind, and moving water generates electricity without smoke, conserving resources for future generations.
Why it matters. Learning about solar and wind power shows how India leads the world in green energy innovations and sustainable architecture.
Try it in two minutes
- Harnessing solar, wind, or hydro power produces 'clean energy' without smoke or polluting emissions.
- Discover the Bhadla Solar Park in Rajasthan, one of the world's largest photovoltaic installations.
- Learn about Cochin International Airport in Kerala, the world's first airport entirely powered by solar power.
- Study traditional Vaastu Shastra architecture, which designs courtyards and windows to optimize natural light and airflow.
Try at home. Build a simple paper pinwheel or waterwheel to observe how moving wind or flowing water spins a turbine.
What your child will practise
- Electricity and Energy Efficiency: Mission Control Quest (Collect the Answer)
- Electricity and Energy Efficiency: Space Quick Fire (Quick Fire)
- Forms of Energy and Motion: Candy Puzzle (Clue Puzzle)
- Fuels, Food, and Thermal Wisdom: Jungle Quick Fire (Quick Fire)
- Renewable Energy and Sustainable Design: Space Quest (Collect the Answer)
- Quiz: Electricity and Energy Efficiency (8 questions)
- Quiz: Forms of Energy and Motion (8 questions)
- Quiz: Fuels, Food, and Thermal Wisdom (8 questions)
- Quiz: Renewable Energy and Sustainable Design (8 questions)