Warm Up! What is the lithosphere? What is the asthenosphere? What happens to the plates at a convergent boundary and what is formed? What happens to the plates at a divergent boundary and what is formed? What happens to the plates at a transform fault boundary and what event occurs? **Did you finish your HW (plate boundaries table??**) **Set up Cornell Notes on a new page!! (1 st and 3 rd Block pg: 25; 2 nd pg 27)**

Announcements Monday Review Tuesday Test If you are absent Monday, you will be taking the test on Tuesday!! No excuses. Unit 3 Notebook Check on Friday (please have your notebook ready and organized!)

Objective & LEQ Objective: SWBAT compare and contrast the three types of volcanoes. LEQ: How are the three types of volcanoes similar and different?

Did a Massive Volcano Cause Massive Extinction?! *Warm Up: Read article provided on your desk and respond with at least 5 sentences in your notebook (under your goal).

Map of Volcanoes around the WORLD!

Current Event – VOLCANIC EXPLOSION! Cleveland Volcano! – losing lava right now In Alaska! 52 degrees North, 169 degrees West (where is it?!) – REVIEW! Summit Elevation – 5676 ft.

What is the difference between magma and lava? REVIEW: What is the type of rock that forms when magma cools and hardens? What type of rocks forms when lava cools and hardens? THEY ARE BOTH TYPES OF IGNEOUS ROCK! What’s the difference?! –Think location… Magma is inside the Earth’s crust and lava is outside

What determines a volcano's eruption? Viscosity What is viscosity? How resistant a substance is to flowing. (For example, honey is more viscous than water)

What effects magma’s viscosity? Silica content Temperature Dissolved gas content

What effects magma’s viscosity? What will make magma more viscous? Increased silica content Increased dissolved gas content (Lava contains dissolved gases, and if the lava is very viscous, those bubbles cannot expand. Instead, the bubbles will explode upwards). Low Temperature What will make magma less viscous? Less silica Decreased dissolved gas content High Temperature (lava that is hotter will flow more- like if you heat up honey or syrup).

Lava Rock

Lava Rock Beach

What do volcanoes eject? Pyroclastic materials: which is a fancy name for particles. These particles can be as small as ash or as large as boulders.

There are 3 main types of volcanoes, but they all have this general form:

What are Shield Volcanoes Fluid lava that spreads far and hardens Broad shape Non-violent eruptions Island volcanoes (for example, Hawaii)

Mauna Loa

Mauna Loa- Gases

Driving up Mauna Kea

On top of Mauna Kea

What are Cinder cone volcanoes Ejects lots of cinders (chunks of pyroclastic material) that accumulate at the bottom. Steep sides Short lifespans (usually only erupt once). Small in size

What are Composite cone volcanoes HUGE! Produce both lava and pyroclastic material that can reach up to 120 mph! Where are they found? Ring of Fire (which is a zone of volcanoes that circles the Pacific Ocean) Can sometimes form lahars What is a lahar? Mudflows that are made when lava mixes with water and soil.

What are Calderas Volcanic depressions How is it created? Magma chamber is drained, volcano collapses on itself. What does it look like? A valley.

What are volcanic necks? Formed when a volcano has been weathered down so that only the magma conduit (pipe) is left.

What are lava plateaus? Made from very low-viscosity lava flowing out of a fissure (crack) in the ground. Lava spreads really far and creates a flat landform.

Volcano Group Work *Ground Rules: Everyone stays in their seat, Inside voices only about assignment, All members of group must participate *Groups of 3-Each group member will start with one sheet 1.Each member will have 5 minutes to read their first article. 2.After 5 minutes you will rotate articles. (Twice) 3.Each group member will share out their answers from the original article, and the other group members will compare their answers 4.When the group is ready with all answers, they will raise their hand and Ms. Guffey will check your answers

EXIT TICKET (mini-quiz): 1.What is continental drift (clue: think Pangaea)? 2.What is one piece of evidence for continental drift? 3.Where do plate tectonics occur? 4.What are the 3 different types of plate boundaries? 5.Next to the 3 different types above, name a land feature that is formed because of the plate boundaries 6.What is viscosity? 7.Name and describe one of the types of volcanoes.

Independent Practice Half-sheet volcano questions