MATERIALS:
- A candle
- A plate
- A glass
- Matches or a lighter
- Water
INSTRUCTIONS:
- Place the candle on the plate.
- Pour some water into the plate.
- Light the candle.
- Put the glass upside down on the plate.
- Look at the flame and the water in the glass.
The flame goes out and the water level in the glass rises.
WHY?
The candle flame heats the air in the glass, and this hot air expands. Some of this hot air escapes out from under the glass (you can see some bubbles). When the flame goes out, the air in the glass cools and contracts. The cool air inside of the glass creates a vacuum due to the low pressure inside the glass and the high pressure outside of the glass.
WRITE YOUR COMMENTS!:
Subscriure's a:
Comentaris del missatge (Atom)
Cap comentari:
Publica un comentari a l'entrada