For Class 8, 9 & 10
Foundation - a strong base in Physics, Chemistry, Maths & Biology
Concept-first questions with clear model answers across all four subjects, aligned to NCERT. Start early, build the habit, and walk into your board exams, NEET and JEE already ahead.
Showing 1 question in Chemistry for Class 8. Tap a card to reveal the answer.
ChemistryPollution of Air and WatermediumWhat is the greenhouse effect and why is it a concern today?
Reveal answer ↓
What it is
Greenhouse gases act like a blanket that traps the Sun's heat around the Earth.
Answer
The greenhouse effect is the trapping of the Sun's heat near the Earth's surface by gases like carbon dioxide, methane and water vapour, which keeps the planet warm enough for life. It becomes a concern when human activities release extra greenhouse gases, trapping too much heat and causing global warming and climate change.
- •Gases (CO2, methane, water vapour) trap the Sun's heat
- •The natural effect keeps Earth warm enough for life
- •Excess gases -> global warming and climate change
Why learn this
It explains climate change - the biggest environmental challenge of your generation.
💡 Memory trick
Like a car in the sun: heat gets in but can't get out. Too much = overheating (warming).