Sunday, July 19, 2015

Melting Ice in the Fridge

Saturday night at dinner time had us conversing about our world. Somehow, the conversation was turned to, "What do you think will happen if we put ice in the fridge?" J, without hesitation, hypothesized that it would melt. Why? Because he's just that smart (intuition).

John and J put an ice in a cup and placed it in the fridge over night.

J checked on it during breakfast this morning and found that it wasn't completely melted! He was baffled. We left it in the fridge until lunch time, when it was found completely melted. They put another piece of ice in a cup and left if out between breakfast and lunch. That too was completely melted by lunch time.

Why did the fridge ice take longer to melt?

The temperature in the fridge was above freezing, so the ice would melt. It took a long time since the temperature in the fridge was in the high 30 (deg F) range. The air from the fridge did melt the ice. It was just slightly warmer than the ice itself, so it took a long time.

The temperature of the room (~72 deg F) was much higher than freezing point (32 deg F), so it didn't take as long to melt the ice cube.

Other things you can try with ice:

Melt an ice cube in front of a fan. Have one away from the fan to compare the two. What happened?

Record the temperature of various locations around your house (fridge, freezer, closet, patio, washing machine, etc.) with a thermometer and predict which ice cube will melt the fastest based on the knowledge you learned here. Place an ice cube in various locations and see if you're right!

Related Posts:
     *Melting ice, measuring temperature
     *Melting ice with colors

3 comments:

  1. Glenda, what wonderful ways you have of making science fun for kids!

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  2. Replies
    1. Thanks! I'm on a bit of a blogging break, so kind words are always nice motivation to get back on the saddle.

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