Objective

By the end of this lesson, RR will understand how adding or removing heat can change a substance from a solid to a liquid and vice versa. RR will also be able to explain the concept of melting and freezing using everyday examples.

Materials and Prep

• Ice cubes (or any small solid piece of ice)
• A small bowl or container
• A heat source (like warm water or a sunny spot)
• A thermometer (optional, if available)

Before starting the lesson, make sure to have a safe area to conduct the activities. Explain to RR the importance of being careful around heat sources. If using a thermometer, show RR how to read it.

Activities

• Melting Ice Experiment:

  RR will place ice cubes in the bowl and observe what happens when they are left at room temperature. After some time, RR will notice that the ice starts to melt and can discuss why this happens.

• Warm Water Test:

  RR will fill another bowl with warm water and place ice cubes in it. RR will observe how quickly the ice melts in warm water compared to room temperature, discussing the effect of heat on the ice.

• Freezing Water Experiment:

  RR can take a small amount of water and place it in the freezer, observing how long it takes to freeze. RR can check back periodically to see the changes and discuss how removing heat causes water to freeze.

Talking Points

• "What do you think happens to ice when it gets warm?"
• "When we add heat to ice, it changes to water. This process is called melting!"
• "Can you feel the warmth of the water? That heat is making the ice melt faster!"
• "Now, think about what happens when we put water in the freezer. What do you think will happen?"
• "When we take heat away from water, it changes back to ice. This is called freezing!"
• "Every time you heat something up or cool it down, you're changing its state! Isn't that cool?"
• "Can you think of other things that melt or freeze? Like ice cream or chocolate?"
• "Remember, heat is like a magic power that can change things from solid to liquid and back again!"