Easy⏱ time45 min$ cost4
Greenhouse Effect Demo
Two jars, one sealed, show how trapped air heats faster under a lamp.
Start building ↓
Result first
The build
Step 01
Prepare jars
Put a thermometer in each jar.
Step 02
Seal one
Cover one jar with wrap, leave one open.
Step 03
Shine the lamp
Light both equally.
Step 04
Compare temps
Record both over time.
Working Principle
The sealed jar traps warmed air so it can't escape, so its temperature climbs faster and higher than the open one.
The science behind it
A closer look
It models how greenhouse gases trap heat in the atmosphere, raising surface temperature.
Take it further
Variables to test
- 1 Add CO₂ (from soda) to one jar — hotter?
- 2 Compare clear vs tinted covers.
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