Salty Matters

 STEM Thursday, Kostoryz Elementary, September 22nd, 2015

Presenters:  Ms. Delagarza, Ms. Harty, Ms. Moore, Ms. Nieto, 

Salty Matters Ice Cream Lesson Plan



  • What are the three states of matter?

  • What causes changes in states of matter?


Salty Matters Student Lab

Safety First

Lab Safety First

What kind of salt will make ice cream the fastest?


  • Step 1: In the plastic cup, mix together milk, sugar and vanilla.

  • Step 2: Carefully, pour the mixture from the cup into the sandwich size Ziploc bag. Take the beginning temperature of the mixture with a thermometer. Record the temperature of the mixture on your data sheet. Close the bag while carefully removing air. Make sure the bag has a tight seal.

  • Step 3: In the large Ziploc bag, add 3-4 cups of ice.

  • Step 4: Add the rock salt or table salt to the ice.

  • Step 5: Place the small bag inside the large bag. Take the temperature of the small bag inside the large bag. Record the temperature on your data sheet under middle temperature. Carefully close the bag while removing any excess air. Make sure the bag has a tight seal.

  • Step 6: Record the time in your data sheet. Shake the bag until your teacher tells you to stop. Record the time when you finish shaking.

  • Step 7: Take the end temperature of the substance inside the sandwich bag. Record on your data sheet.


  • What happened to the mixture? Why?

  • Did the evidence support your hypothesis?

  • What was the independent variable in the experiment?

  • What was the dependent variable in the experiment?


think, pair, share

How can you change the variables to create a different investigation?


exit slip

3-2-1 Exit Slip