1. PS 3-17 Happy St. Patrick’s Day!

2. 4 days to end of marking period All late assignments due by Wednesday Will review what is missing, and grades with each student at end of class today (if possible, technology willing)

3. Reminder Final Test of Marking Period is this Wednesday Review for test is tomorrow

4. First Job of day Is to finish whatever notes that have not been completed during DSTP

5. Where are volcanoes found in the world? Convergent - Subduction only Divergent - all Other -hot spots

6. One other place of volcano formation Hot Spots Created because a narrow stream of hot mantle raises up from the core-mantle boundary Long lasting point of heat, stationary with respect to the plates If formed under ocean crust, creates an island arc

8. Places where there might be a hot spot Hawaii Yellowstone Iceland Tahiti Up to 50 places in the world

9. Types of lava Aa- Sharp, highly Viscous, Clinking sound Pahoehoe- Smooth, Ropey, Smooth Flowing Pillow lava- Lava emerging underwater Difference is based location and composition

11. Do volcanoes only exist on earth? What is needed to produce a volcano? How would the eruption of a volcano on a small moon differ from the earth’s eruptions?

12. Oympus Mons

13. Facts about Olympus Largest volcano in the solar system Not active 370 miles wide, 16 miles high Cliffs rim the edge up to 3 miles high Generated by a hot spot

14. Why is this volcano so much larger than others? Gravity (or lack of it) Plate Tectonics (or lack of it)

15. Io

16. Io is a moon about Jupiter Most volcanically active spot in the solar system Little gravitational pull and no atmosphere allow plumes to rise great distances

17. Where do quiet volcanoes form? Connected to hot spots Subduction boundaries related ocean to ocean Galapagos Islands Hawaiian islands Easter Islands Canary Islands

18. Where do Composite volcanoes form? Formed at Subduction zones between continental and oceanic plates

20. Where do cinder volcanoes form? Small 10-100’s m high Found on flanks of other types of volcano Not as much volcanic material-secondary vents

21. What is used to predict the future eruption of a volcano? Earthquake activity Change in chemical composition of the gases released by the volcano Change in the shape of the lava dome Change in volcanic activity of mountain

22. Classwork-Homework 1) Modern Earth Science handout Side 7.1, do all questions but 4 Side 7.2, do 1-6 and 10 2) Questions for volcanoes handout Do all, discuss with class

23. Question #2 What determines whether lava is highly viscous or flows smoothly?

24. Handout old papers Can not handout old tests in periods 5, 7 Answers to test will be available tomorrow online or in class

25. Grade check/update