Changing Times
Class 4 · Environmental Studies
4 ideas in Class 4 Environmental Studies, explained in plain words, with games and quizzes to practise.
From Tents to a Mud House
Part of: Old Traditions and New Shelters
During the partition of India, many families had to leave their ancestral villages, live temporarily in tent camps, and then build homes on newly allotted land using local mud, straw, and tree branches.
Why it matters. Learning about early shelter construction teaches children how people adapted creatively using natural materials to protect themselves against insects and weather.
Try it in two minutes
- Talk with your child about what a family would need if they had to move to an empty plot of land.
- Discuss why mixing cow dung with mud helped protect traditional village floors from insects.
- Explain how bitter neem and keekar wood protected wooden roof beams from termites.
Try at home. Look around your home and identify which materials came from plants and which are manufactured factory products.
How Houses and Kitchens Changed
Part of: Old Traditions and New Shelters
As decades passed, building materials shifted from sun-dried unbaked bricks to kiln-fired baked bricks, iron rods, and cement. Kitchens also moved from floor-level clay chulhas using firewood to modern raised counters with gas stoves.
Why it matters. Understanding changing construction materials helps children appreciate how modern engineering improves durability, hygiene, and indoor comfort.
Try it in two minutes
- Compare a red baked brick with a piece of dried clay soil.
- Ask your child why firing a brick in a kiln makes it harder and waterproof.
- Discuss how cooking on a gas stove produces less smoke than burning wood in a clay chulha.
Try at home. Observe your kitchen and note whether the cooking counter is at floor level or standing height.
Sanitation and Urban High-Rises
Part of: Modern Living and Construction
In the past, many people walked to open fields or used dry latrines that required other people to carry waste away. Modern houses use closed flush toilets connected to underground pipes, protecting human dignity and preventing diseases.
Why it matters. Learning about sanitation teaches the importance of hygiene and respect for sanitation workers, while showing how growing populations live in high-rise buildings.
Try it in two minutes
- Trace where the wastewater from your bathroom sink goes through curved drain pipes.
- Discuss why open defecation causes diseases and flies to spread in a community.
- Explain how a high-rise building allows dozens of families to live comfortably on a single plot of land.
Try at home. Count how many storeys the tallest building in your neighbourhood has.
Building Trades and Construction Work
Part of: Modern Living and Construction
Building a safe house requires a team of skilled workers: masons lay bricks and cement, carpenters shape wooden doors and frames, plumbers install water and waste pipes, and electricians wire lights.
Why it matters. Appreciating construction trades helps children understand teamwork and respect the hard physical labor behind our built environment.
Try it in two minutes
- Ask your child who fixes a leaking tap (plumber) and who makes wooden furniture (carpenter).
- Talk about the mason who uses a trowel and plumb line to lay straight brick walls.
- Notice how each worker uses special hand tools designed for their trade.
Try at home. Draw three tools used by different workers: a hammer (carpenter), a trowel (mason), and a pipe wrench (plumber).
What your child will practise
- Building Trades and Construction Work: Jungle Quick Fire (Quick Fire)
- Building Trades and Construction Work: Mission Control Quest (Collect the Answer)
- From Tents to a Mud House: Candy Quick Fire (Quick Fire)
- How Houses and Kitchens Changed: Time Travel Sort (Sort It Out)
- Sanitation and Urban High-Rises: Jungle Puzzle (Clue Puzzle)
- Quiz: Building Trades and Construction Work (8 questions)
- Quiz: From Tents to a Mud House (8 questions)
- Quiz: How Houses and Kitchens Changed (8 questions)
- Quiz: Sanitation and Urban High-Rises (8 questions)