Energy Transferred by Heating
Energy and Thermal Physics

Freezing Time

Enrichment Activity for 5-11 11-14


What you need

  • A cheap battery-driven clock
  • A freezer
  • A small plastic box
  • Tissue paper or cotton wool

Instructions

  1. Take the clock and put it in the box. Pack it in with tissue paper or cotton wool to keep it dry. Don't use your best clock, just in case it gets damaged!
  2. Put the box in the freezer and leave it for about an hour
  3. Take the clock out - is it still working?

Results and Explanation

Put it in your living room and wait a day or two – it should start working again eventually.

Batteries use chemical reactions to make a current flow. It flows with much more difficulty inside a battery at freezing temperatures, so that the battery doesn’t work, but it usually returns to normal when it’s warmed up.

IOP DOMAINS Physics CPD programme

Energy CPD videos

Our new set of videos gives teachers and coaches of physics a preview of the training we offer ahead of this term's live support sessions.

Find out more