Exploring Meling Ice with Twist™ - Learning Resources®
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Exploring Meling Ice with Twist™
Untitled Document
Time:
15-20 Minutes
Materials: Twist™, ice
cubes, salt, plastic
plates, stopwatch
or timer
Skills: Observation, Physical change,
           Variables

Grades: 2-3
Small Group
Grouping:
Whole Class
Model
1. Explain to students they will investigate how salt affects ice.

2. Use Twist to
show students a
view of an ice
cube's surface and
of salt crystals.
Have students
verbally compare
the salt and ice.
Guide
3. Place two ice cubes on a plate. Ask students to predict what will happen when salt is placed on one of the ice cubes and write predictions on the attached sheet.

4. Sprinkle some
salt on one ice
cube. Place Twist
above the salted
ice cube and have
students observe
for one minute. Take
snapshots of both
ice cubes and label
them salted 1 minute and unsalted 1 minute. Show students the pictures and have students discuss and write what they see.

5. Repeat the process of sprinkling salt on one ice cube. Have students use Twist to collect pictures of both ice cubes after four and eight minutes have passed. Have students record predictions and observations about what the ice cubes look like at each interval. Students generate conclusions about the effects of salt on ice after eight minutes.
Assess
6. Show the Twist snapshots taken at different intervals to students and have them place the pictures in sequential order. Ask them to justify their ordering based on details from the pictures. Students present their findings to the class.
Extend
7. Have students add the variables of heat and water to the experiment to determine if blowing on ice or placing warm water on ice will have the same effect as the salt.
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