11/18: Reviewing forces and plate tectonics

Warm up

A force is a ________________ between to objects or systems of objects.

Textbook review

  • 15 minutes: Read/skim through the pages below on your own, taking notes as you go (including questions you are not sure of). Include sketches!
  • 25 minutes: With your group, review your notes, sharing and adding to your notes.
  • You will get credit for your notes: 1 page = C; 1-2 pages = B; 2-3 pages = A
  • Forces: Pages 356-364 & 370-371
  • Plate tectonics: Pages 676-683

Exit ticket

Name the properties needed for each of the following two forces that act at without contact: Gravity and electromagnetic.

Answers to warm up and exit ticket

  • A force is an interaction between two objects.
  • Gravity requires objects to have mass (which all objects have!) and electromagnetic force requires objects to have charge (positive or negative).

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