NextGenPET Instructor Resources

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UCR L3 Video Clip 2: Group discusses CQ 3-1

Group discusses CQ 3-1. First Sam argues for Samantha but the others in the group disagree and think its Luisa. After some discussion they stay with their original answers.

UCR L3 Video Clip 3: Group discusses how molecules differ from formula units

Group discusses the last making sense question on CR-22—how molecules are structurally different from formula units.

UCR L3 Video Clip 5: Group compares # of particles before and after reaction

Group has an interesting discussion about the third making sense question on CR-24—comparing the number of 'particles' on the left and right side of the arrow in the chemical equation. They are uncertain about the meaning of 'particle' and refer back to the chart on 'Small Particles' on CR-21.

UCR L3 Video Clip 6: Group discusses conservation of mass

Group discusses how the picture model helps explain why mass is conserved. They have two arguments: one is about the number of particles remaining the same; the other is about the overall size of the particles remaining the same. They do not reach a consensus by themselves.

UCR L3 Video Clip 7: Group discusses hydrogen combining with oxygen to produce water

After watching the YouTube video of the bursting of the balloons the group members separately drew a molecular representation of the reaction to produce water. Two students explain their drawings.

UCR L3 Video Clip 8: Student goes over answer to SQ #1

Sam shares her molecular representation and symbolic representation for the aluminum-bromine reaction.