Do all objects bend? (investigation)

3.A Construct and revise a written argument using evidence from various sources of data (slow-motion videos, photos, and firsthand investigations) to support or refute the claim that all objects do bend or change shape when pushed in a collision.

By this point in the lesson, students should provide evidence and support or refute their original claim to reflect that all objects do bend or change shape when pushed in a collision.

If students are not in agreement that all objects bend or change shape in a collision, observe what evidence the students have collected in their organizers to verify that the evidence was recorded correctly. If any evidence was not recorded accurately, have students review that part of the investigations and compare this with their evidence on their handouts. Ask students to refer to the evidence collected from the laser investigations and the concrete joint video to support or refute their original claim. All the observations made by students should provide evidence that the objects are changing shape or bending as a force is applied. The one exception would be the head of the golf club when it strikes the golf ball. But by the end of the lesson, students should be able to argue that it too may actually bend or change shape, but this may be occuring at too small of a scale for us to see in the video. If students are still struggling with this concept, pull up each video again at the start of the next lesson and/or go over the glass demonstration individually with students, making sure that they are observing that the objects are indeed changing shape when a force is applied. Pointing out the observations and helping students connect the observations to their claim will help students understand the key idea.

Introduce a new word. Say, We have been talking a lot about objects bending or changing shape. Scientists call this deformation. When an object bends or changes shape, it deforms.

Add deform to the Word Wall.✱