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Lecture Science 1 - Associate Degree in Education: Lecture 30 - Dr. Arshad Bashir

Lecture 30 - States of matter and particle theory. Most students have seen the models for states of matter in textbooks. As a result, they might be able to recall some of the basic descriptions. However, most often they are only able to recite what they memorized. They lack a deeper conceptual understanding of particle theory. Therefore, it is it is essential to spend time developing this deeper understanding. Listen carefully to their ideas to prevent misconceptions. | Lecture # 30 SCIENCE 1 ASSOCIATE DEGREE IN EDUCATION STATES OF MATTER AND PARTICLE THEORY STATES OF MATTER AND PARTICLE THEORY Most Students have seen the models for states of matter in textbooks. As a result, they might be able to recall some of the basic descriptions. However, most often they are only able to recite what they memorized. They lack a deeper conceptual understanding of particle theory. Therefore, it is it is essential to spend time developing this deeper understanding. Listen carefully to their ideas to prevent misconceptions. Syringe with air In this activity, establish the concept that gases are matter and that gases can be compressed. (Demonstrate, for instance, by compressing a closed syringe that contains nothing but air.) Ask Students what they observe and how they would explain what’s happening inside the syringe. Push their thinking until they visualize the particles that are inside the syringe. First, have them draw a picture that represents the syringe and the air inside. Discuss how they could represent the air in the syringe in their drawing. What kinds of particles are in air? Have them discuss a visual representation that reflects their understanding. How would they include the gas molecules in the drawing? Make sure they understand that air is a gaseous mixture of different molecules, such as nitrogen, oxygen, and so on. Syringe with air continue . Continue the discussion by asking them to zoom in even closer and explain what’s inside each molecule (revisit the atomic structure). What’s in the space between the particles? Make sure that Student Teachers understand that there is nothing in that space. Syringe with air continue . Second, continue the discussion about what happens if you compress the syringe. Draw a picture of that next to the uncompressed syringe. Student Teachers should realize that the only thing that changes is the space between the molecules. The number and type of molecules do not change; they are just . | Lecture # 30 SCIENCE 1 ASSOCIATE DEGREE IN EDUCATION STATES OF MATTER AND PARTICLE THEORY STATES OF MATTER AND PARTICLE THEORY Most Students have seen the models for states of matter in textbooks. As a result, they might be able to recall some of the basic descriptions. However, most often they are only able to recite what they memorized. They lack a deeper conceptual understanding of particle theory. Therefore, it is it is essential to spend time developing this deeper understanding. Listen carefully to their ideas to prevent misconceptions. Syringe with air In this activity, establish the concept that gases are matter and that gases can be compressed. (Demonstrate, for instance, by compressing a closed syringe that contains nothing but air.) Ask Students what they observe and how they would explain what’s happening inside the syringe. Push their thinking until they visualize the particles that are inside the syringe. First, have them draw a picture that represents the syringe and