tailieunhanh - Lecture Science 1 - Associate Degree in Education: Lecture 22 - Dr. Arshad Bashir

Lecture 22 - Graphing motion. After completing this chapter, students will be able to: Discuss Student’ findings and conclusions. Give each group 10 minutes to discuss its data in response to the task and the questions You might want to add free-body diagrams to their task for additional practice. | Lecture # 22 SCIENCE 1 ASSOCIATE DEGREE IN EDUCATION Graphing Motion Graphs and Presentation Discuss Student’ findings and conclusions. Give each group 10 minutes to discuss its data in response to the task and the questions You might want to add free-body diagrams to their task for additional practice. Group Presentations Instead of having each group present its findings, you can save time by asking for volunteers. Then discuss that group’s presentation with the rest of the class. For instance, after each group’s presentation, you might ask questions such as: Do you all agree with the findings and explanation of this group? Why or why not? Did you obtain similar or different data? Why do you think you have the same/different data? Gravity: A Force At this point in the unit, make sure all Students understand that one major force in nature is gravity, which is an attractive force between matter. Earth creates a strong gravitational force that pulls everything towards it. When they place their car on top of the ramp, they lift it, giving it potential energy. When they let it go, the pull of gravity causes it to move faster and faster down the ramp, gaining more and more momentum. The higher the ramp, the more potential energy the car has, and the more momentum it will have when it reaches the bottom. Exploration and Discussion Also at this point of the exploration and discussion, introduce Students to the term acceleration. The steepness of the ramp influences how rapidly a car accelerates. (They might have experience from bicycling down steep hills.) The steeper the incline, the more rapidly a car accelerates. However, the explanation is not that simple. Listen carefully to how they explain the forces acting on a car that is standing still on top of the ramp. Then listen carefully when they explain what happens to the car when it moves down the ramp. Can they explain that the gravity acting on the car is always the same, but how the pull is distributed depends on | Lecture # 22 SCIENCE 1 ASSOCIATE DEGREE IN EDUCATION Graphing Motion Graphs and Presentation Discuss Student’ findings and conclusions. Give each group 10 minutes to discuss its data in response to the task and the questions You might want to add free-body diagrams to their task for additional practice. Group Presentations Instead of having each group present its findings, you can save time by asking for volunteers. Then discuss that group’s presentation with the rest of the class. For instance, after each group’s presentation, you might ask questions such as: Do you all agree with the findings and explanation of this group? Why or why not? Did you obtain similar or different data? Why do you think you have the same/different data? Gravity: A Force At this point in the unit, make sure all Students understand that one major force in nature is gravity, which is an attractive force between matter. Earth creates a strong gravitational force that pulls everything towards it. When they .