Halloween? We call it Science!

Posted on Oct 26, 2012 in General

Today, we had a very exciting interruption to our day!

Mrs Trussler, the Secondary School Science teacher, told us that a delivery of dry ice had arrived at school. How exciting!  We raced upstairs to the Science lab for a wonderful lesson on states of matter. We watched in awe as the dry ice behaved differently in the air, on the table, in water and in a soap mixture.

We learned that dry ice is actually solid carbon dioxide, which has frozen at a temperature of -78 degrees Celsius. We learned about solids, liquids and gases. We even watched the process of sublimination right before our eyes. We loved popping  bubbles of carbon dioxide!

Dry ice makes spooky smoke at Halloweeen….but today, it was Super Science for Grade 4!

Thank you, Mrs Trussler, for adding so much to our learning.


Halloween Science on PhotoPeach


What did you learn about states of matter?

What other substances do you know that change from a solid to a liquid to a gas?

Can you explain sublimination?



Join the conversation and post a comment.

  1. Diana

    Dear Ms O’dwyer,
    The science experiment that we experienced was SO cool!
    Thank you for letting us see that great thing. I’d like to try it again, too!
    I have a question for you and others. Who first discovered this type of Science?

    I’ll wait for your kind reply.


  2. Diana

    Dear Ms O’dwyer,
    Sublinimation is a process of solid NOT getting to a liquid. It’s a process of solid getting to a GAS!
    The temperature should be -75 degrees in the refrigerator for it to be a solid.

    Kind Regards,

  3. Poonnapa

    Dear Ms.O’Dwyer

    I like science because it is great! I like dry ice too. I also want to know how dry ice can melt without becoming liquid and who was the frist person to make dry ice.

    Kind Regards,

    • Poonnapa

      Dear Ms O’Dwyer

      I found on the internet that Charles Thiorier discovered dry ice in 1834. He found dry ice in a liquid carbon dioxide cylinder.

      Kind Regards,