I would use this picture to engage my learners in thinking critically by covering the liquid picture, and having them just observe the solid objects. I would ask them to really take note to the properties and how the solid looks now. Then I would have them make a prediction to the question "What do you think will happen when you apply heat to that solid, and explain your prediction?" Then I would uncover the liquid picture and have them observe the whole picture together. I would ask them, "Was your prediction correct?! If not what do you think you could change about your prediction now if you could to make it more correct and appropriate? "Are there other ways to change solid objects to liquids?"
I would use these two pictures to engage my learners in critically thinking by having them again observe just the first picture only and observe the properties they see in the liquid in the ice tray. I will ask them a question like,"what are some properties liquids possess? "Based off of the picture how can you tell?" Also make a prediction:"if you place the ice tray in a colder temperature, what is going to happen to the liquid? How do you know this?" Use evidence about the properties of liquids and what happens when energy (the coldness) acts upon the liquid. Then, I would show them the second picture and say, "this is the result of the ice tray being in a colder temperature" Were your predictions correct? Yes or no? Support your answer with evidence that you see from the first picture, to the second picture. How does the second picture differ now from the first picture? To think deeper I would ask them, "What could you do to the ice cubes to make them go back to the liquid state?"
I would use this picture to engage my students in critically thinking by having them tell me what they are seeing in this picture. I would ask them questions like, "what is this a picture of? What is coming out of the tea kettle? What is acting on the kettle to force the steam out of the tea kettle? What is inside the tea kettle?" Then after getting feedback from their responses I would ask them, "can any liquid inside the kettle be heated and changed to give off steam? What is the steam acting as? Is a gas always given off after a liquid has been heated? how do you know? What is that called? make a prediction!
Finally, I would use this last picture to engage my learners by showing them the relationship between the three states of matter and how they go through changes and phases. I would have them observe how the solids can become liquids, liquids can become gases, etc. I would ask them questions like, "Does this process remind you of another process in science or another type of cycle?" "How do these phase changes affect us in daily life? When do you see phase changes occur, provide some examples and what type of phase change it is."