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Volcano Unit Pre Assessment Name __________________________ Matching Match the type of volcano to the correct picture by drawing a line to connect the two. Composite Volcano Shield Volcano Cinder Cone Volcano Multiple Choice Select the best answer and write the letter on the line. 1. ______ Where are most volcanoes found? a. On mountains b. Europe c. Along plate boundaries d. South America 2. ______ A major volcanic belt formed by many volcanoes that rim the Pacific Ocean is called a. The Ring of Fire b. The Volcanic Belt c. Explosivo d. Rim of Volcanoes 1 3. ______ A volcano that is erupting, or has erupted recently is classified as a. Active b. Dormant c. Extinct d. Awake 4. ______ A volcano that hasn’t erupted in recent history, but could erupt is classified as a. Active b. Extinct c. Dormant d. Sleeping 5. ______ A volcano that will never erupt again is considered a a. Dormant b. Extinct c. Active d. Dead 6. ______ An area where material from deep within the mantle rises and then melts, forming magma is called a a. b. c. d. Magma pool Hot Spring Chamber Hot Spot 7. ______ When groundwater is heated in hot rock near shallow magma bodies a ______ can form a. b. c. d. Batholith Dike Geyser Volcano 8. ______ When magma heats underground water, the result may be a a. b. c. d. lava flow hot spring hot spot bath 2 9. ______ The tendency of a fluid to resist flowing is called a. b. c. d. Static Resistance Friction Viscosity 10. ______ The major ingredient in Magma is a. silica b. basalt c. Carbon Dioxide d. granite 11. ______ As a volcano erupts, what force pushes magma out of a volcano onto the surface? a. Flowing water b. The Jedi Force c. Dynamite d. The force of expanding gases True or False. Circle whether the state is true or false. 12. True or False. A volcano is a weak spot in the Earth’s crust where molten material comes to the surface 13. True or False. Yellowstone National Park marks a hot spot under the North American plate. 14. True or False. How fast lava flows depends on the properties of the magma from which it formed including its silica content and temperature. 15. True or False. Dormant volcanoes can become active at any time. 3 Label Label the parts of the volcano listed below on the diagram. Magma Chamber Vent Crater 4 Volcano Unit Pre Assessment - Modified Name __________________________ Matching Match the type of volcano to the correct picture by drawing a line to connect the two. Composite Volcano Shield Volcano Cinder Cone Volcano Multiple Choice Select the best answer and write the letter on the line. 1. ______ Where are most volcanoes found? a. On mountains b. Europe c. Along plate boundaries 2. ______ A major volcanic belt formed by many volcanoes that rim the Pacific Ocean is called a. The Ring of Fire b. The Volcanic Belt c. Explosivo 5 3. ______ A volcano that is erupting, or has erupted recently is classified as a. Active b. Dormant c. Extinct 4. ______ A volcano that hasn’t erupted in recent history, but could erupt is classified as a. Active b. Extinct c. Dormant 5. ______ A volcano that will never erupt again is considered a a. Dormant b. Extinct c. Active 6. ______ An area where material from deep within the mantle rises and then melts, forming magma is called a a. Hot Spring b. Chamber c. Hot Spot 7. ______ When groundwater is heated in hot rock near shallow magma bodies a ______ can form a. Batholith b. Dike c. Geyser 8. ______ When magma heats underground water, the result may be a a. lava flow b. hot spring c. hot spot 9. ______ The tendency of a fluid to resist flowing is called a. Resistance b. Friction c. Viscosity 6 10. ______ The major ingredient in Magma is a. silica b. basalt c. Carbon Dioxide 11. ______ As a volcano erupts, what force pushes magma out of a volcano onto the surface? a. Flowing water b. The Jedi Force c. The force of expanding gases True or False. Circle whether the state is true or false. 12. True or False. A volcano is a weak spot in the Earth’s crust where molten material comes to the surface 13. True or False. Yellowstone National Park marks a hot spot under the North American plate. Label Label the parts of the volcano listed below on the diagram. Magma Chamber Vent Crater 7 Volcano Unit Post Assessment Name __________________________ Matching Match the type of volcano to the correct picture by drawing a line to connect the two. Composite Volcano Shield Volcano Cinder Cone Volcano Multiple Choice Select the best answer and write the letter on the line. 1. ______ Where are most volcanoes found? a. On mountains b. Europe c. Along plate boundaries d. South America 2. ______ A major volcanic belt formed by many volcanoes that rim the Pacific Ocean is called a. The Ring of Fire b. The Volcanic Belt c. Explosivo d. Rim of Volcanoes 8 3. ______ A volcano that is erupting, or has erupted recently is classified as a. Active b. Dormant c. Extinct d. Awake 4. ______ A volcano that hasn’t erupted in recent history, but could erupt is classified as a. Active b. Extinct c. Dormant d. Sleeping 5. ______ A volcano that will never erupt again is considered a a. Dormant b. Extinct c. Active d. Dead 6. ______ An area where material from deep within the mantle rises and then melts, forming magma is called a d. e. f. g. Magma pool Hot Spring Chamber Hot Spot 7. ______ When groundwater is heated in hot rock near shallow magma bodies a ______ can form a. b. c. d. Batholith Dike Geyser Volcano 8. ______ When magma heats underground water, the result may be a a. b. c. d. lava flow hot spring hot spot bath 9 9. ______ The tendency of a fluid to resist flowing is called a. b. c. d. Static Resistance Friction Viscosity 10. ______ The major ingredient in Magma is a. silica b. basalt c. Carbon Dioxide d. granite 11. ______ As a volcano erupts, what force pushes magma out of a volcano onto the surface? a. Flowing water b. The Jedi Force c. Dynamite d. The force of expanding gases 12. ______ What are two main factors that affect the viscosity of magma? a. b. c. d. Altitude and season Location and Temperature Temperature and Silica content Viscosity of all magma is the same 13. _______ As temperature of magma increases, its viscosity a. b. c. d. Increases Decreases Stays the same Hardens 14. _______ The collapse of a volcano’s magma chamber may produce a a. b. c. d. crater island arc still caldera 15. _______ Volcanic ash is a. b. c. d. smoke and fire small pieces of cooled lava burned substance dirt 10 True or False. Circle whether the state is true or false. 16. True or False. A volcano is a weak spot in the Earth’s crust where molten material comes to the surface 17. True or False. Yellowstone National Park marks a hot spot under the North American plate. 18. True or False. How fast lava flows depends on the properties of the magma from which it formed including its silica content and temperature. 19. True or False. Dormant volcanoes can become active at any time. Short Answer Please answer in complete sentences. What is more likely to be more hazardous — a volcano that erupts frequently, or a volcano that has been inactive for hundreds of years? Why? 11 Label Label the parts of the volcano listed below on the diagram. Magma Chamber Vent Crater 12 Volcano Unit Post Assessment - Modified Name __________________________ Matching Match the type of volcano to the correct picture by drawing a line to connect the two. Composite Volcano Shield Volcano Cinder Cone Volcano Multiple Choice Select the best answer and write the letter on the line. 1. ______ Where are most volcanoes found? a. On mountains b. Europe c. Along plate boundaries 2. ______ A major volcanic belt formed by many volcanoes that rim the Pacific Ocean is called a. The Ring of Fire b. The Volcanic Belt c. Explosivo 13 3. ______ A volcano that is erupting, or has erupted recently is classified as a. Active b. Dormant c. Extinct 4. ______ A volcano that hasn’t erupted in recent history, but could erupt is classified as a. Active b. Extinct c. Dormant 5. ______ A volcano that will never erupt again is considered a a. Dormant b. Extinct c. Active 6. ______ An area where material from deep within the mantle rises and then melts, forming magma is called a a. Hot Spring b. Chamber c. Hot Spot 7. ______ When groundwater is heated in hot rock near shallow magma bodies a ______ can form a. Batholith b. Dike c. Geyser 8. ______ When magma heats underground water, the result may be a a. lava flow b. hot spring c. hot spot 9. ______ The tendency of a fluid to resist flowing is called a. Resistance b. Friction c. Viscosity 14 10. ______ The major ingredient in Magma is a. silica b. basalt c. Carbon Dioxide 11. ______ As a volcano erupts, what force pushes magma out of a volcano onto the surface? a. Flowing water b. The Jedi Force c. The force of expanding gases 12. ______ What are two main factors that affect the viscosity of magma? a. Altitude and season b. Location and Temperature c. Temperature and Silica content 13. _______ As temperature of magma increases, its viscosity a. Increases b. Decreases c. Stays the same 14. _______ The collapse of a volcano’s magma chamber may produce a a. crater b. island arc c. caldera 15. _______ Volcanic ash is a. smoke and fire b. small pieces of cooled lava c. burned substance True or False. Circle whether the state is true or false. 16. True or False. A volcano is a weak spot in the Earth’s crust where molten material comes to the surface 17. True or False. Yellowstone National Park marks a hot spot under the North American plate. 15 Label Label the parts of the volcano listed below on the diagram. Magma Chamber Vent Crater Bonus You may draw pictures with your answer to help you with an explanation if you wish. What is more likely to be more hazardous — a volcano that erupts frequently, or a volcano that has been inactive for hundreds of years? Why? 16 Lesson 1 Assessment A volcano discovery Web Quest Name: _________________ Instructions: Follow each link provided (find the links in your google classroom), and answer the questions accommodating each link in complete sentences. All answers are found using these links. Be sure to click on every link provided within the simulation, and read carefully! Link 1: Introduction to Volcanism http://pbs.panda-prod.cdn.s3.amazonaws.com/media/assets/wgbh/ess05/ess05_int_volcanintro/ index.htm 1. Draw and label a diagram of a volcano. Provide a short description for each part. 17 2. The _____________ that forms from layers of ___________ and __________ is called a _________________. 3. Volcanoes are classified as active, dormant, or extinct. Describe what those classifications mean. 4. There are 4 main types of volcanoes. How are they classified? 5. What are the two primary types of volcanoes? What are the two secondary types? Why are they secondary? 6. List one fact about each type of volcano. Draw the basic shape of each type. 18 7. What are the three places that volcanoes commonly occur? 8. How many hot spots have been identified around the world? 9. What is Hawaii? 10. What kind of volcanoes are associated with hot spots? What other features are associated with hot spots? 11. ______________________________ are places where tectonic plates are moving away from one another. 12. What is much of the oceanic crust made of? 13. _________________ is the word used to describe melted or molten rock inside Earth. 14. What is magma made of? 19 15. What determines the eruption style, rock type, and volcano shape? 16. List the three types of magma and what type of volcano each type comes out of. 17. _________________ rocks are formed when molten rock cools and hardens. 18. What are the two classes of igneous rocks? Where are they found? (Below or on top of Earth’s surface?) Link 2: Volcanic Eruptions and Hazards http://pbs.panda-prod.cdn.s3.amazonaws.com/media/assets/wgbh/ess05/ ess05_int_volcanerupt/02_Effusive.htm 19. ___________________ eruptions are generally considered to be gentler than explosive eruptions. What types of hazards can result from this type of eruption? List 3. 20 20. ____________________ eruptions are the most hazardous, involving large volumes of tephra and gases emitted from the volcano. What types of hazards can result from this type of eruption? List 3. Extra Credit (Extension for advanced students) Follow this link to a third simulation: Volcanic Features. http://pbs.panda-prod.cdn.s3.amazonaws.com/media/assets/wgbh/ess05/ ess05_int_volcanfeatr/03_Caldera.htm 21. How do we know that Yellowstone is actually a volcano? Provide details. 22. What is Devils Tower? 21 Lesson 2 Assessment Viscosity Lab Investigation Name: __________________________ What you need: * 4 small plastic cups Fill 1 cup ½ full of Nacho cheese Fill 1 cup ½ full of vegetable oil * 1 straw per person, cut in half * 1 lab tray * 1 ruler * 1 timer: phone or stopwatch Part 1 Instructions: * Each person will grab ½ of a straw. * One person at a time, place the straw into the cup of oil. * Blow bubbles like you would do with a soda. * Observe how hard you have to blow, and the force and size of the bubbles once the air gets through. * Do the same with the Nacho Cheese using your other 1/2 of the straw. Record your observations below. All group members will do this. a. Blowing in the oil: b. Blowing in the nacho cheese: 22 Part 2 Instructions: * One team member will be the pourer, while another is the timer. * The pourer will first grab the cup with vegetable oil. Holding the ruler vertically (either person can hold the ruler), the pourer will hold the cup approximately 12 inches above an empty cup. * The timer will begin the timing as soon and the pourer begins to pour the oil into one of the empty cups. * The timer will stop the stopwatch as soon as the cup of oil is empty. Record this time in the table below. * Repeat steps 3-5 with the nacho cheese and the other empty cup. * Get some chips and eat your cheese if you want! Liquid Time in Seconds Oil Nacho Cheese Answer the questions below. 1. Describe your flow-test results. Why did you get the results you did? 2. Is the viscosity of the oil higher or lower than the nacho cheese? How do you know? 3. One way to decrease the viscosity of a liquid is to __________ (heat/cool) the fluid? 4. What factors affect the viscosity of a substance? 23 5. What would happen to the viscosity of the oil and the nacho cheese if you heated it up? What if you cooled it down? 6. Can magma have different viscosities? What influences the viscosity of magma? (conduct research if you need to) 7. If magma in a volcano has a high viscosity, would the eruption be quiet or explosive? Why? (Think of how the fluids reacted to you blowing air into them) 8. Could viscosity affect how often a volcano erupts? Why? 9. What are some dangers of a volcanic eruption with high viscosity magma? 10. What are some dangers of a volcanic eruption with low viscosity magma? Bonus: Do you prefer mashed potatoes with low or high viscosity? Explain. 24 Answer Key (Answers in Green) Volcano Unit Pre Assessment Name __________________________ Matching Match the type of volcano to the correct picture by drawing a line to connect the two. Composite Volcano: Middle Shield Volcano: Bottom Cinder Cone Volcano: Top Multiple Choice Select the best answer and write the letter on the line. 1. ______ Where are most volcanoes found? a. On mountains b. Europe c. Along plate boundaries d. South America 2. ______ A major volcanic belt formed by many volcanoes that rim the Pacific Ocean is called a. The Ring of Fire b. The Volcanic Belt c. Explosivo 25 d. Rim of Volcanoes 3. ______ A volcano that is erupting, or has erupted recently is classified as a. Active b. Dormant c. Extinct d. Awake 4. ______ A volcano that hasn’t erupted in recent history, but could erupt is classified as a. Active b. Extinct c. Dormant d. Sleeping 5. ______ A volcano that will never erupt again is considered a a. Dormant b. Extinct c. Active d. Dead 6. ______ An area where material from deep within the mantle rises and then melts, forming magma is called a d. e. f. g. Magma pool Hot Spring Chamber Hot Spot 7. ______ When groundwater is heated in hot rock near shallow magma bodies a ______ can form a. b. c. d. Batholith Dike Geyser Volcano 8. ______ When magma heats underground water, the result may be a a. lava flow b. hot spring c. hot spot 26 d. bath 9. ______ The tendency of a fluid to resist flowing is called a. b. c. d. Static Resistance Friction Viscosity 10. ______ The major ingredient in Magma is a. silica b. basalt c. Carbon Dioxide d. granite 11. ______ As a volcano erupts, what force pushes magma out of a volcano onto the surface? a. Flowing water b. The Jedi Force c. Dynamite d. The force of expanding gases True or False. Circle whether the state is true or false. 12. True or False. A volcano is a weak spot in the Earth’s crust where molten material comes to the surface 13. True or False. Yellowstone National Park marks a hot spot under the North American plate. 14. True or False. How fast lava flows depends on the properties of the magma from which it formed including its silica content and temperature. 15. True or False. Dormant volcanoes can become active at any time. 27 Label Label the parts of the volcano listed below on the diagram. Magma Chamber Vent Crater Crater Vent Magma Chamber 28 Volcano Unit Post Assessment: Answer Key Name __________________________ Matching Match the type of volcano to the correct picture by drawing a line to connect the two. Composite Volcano: Middle Shield Volcano: Bottom Cinder Cone Volcano: Top Multiple Choice Select the best answer and write the letter on the line. 1. ______ Where are most volcanoes found? a. On mountains b. Europe c. Along plate boundaries d. South America 2. ______ A major volcanic belt formed by many volcanoes that rim the Pacific Ocean is called a. The Ring of Fire b. The Volcanic Belt c. Explosivo d. Rim of Volcanoes 29 3. ______ A volcano that is erupting, or has erupted recently is classified as a. Active b. Dormant c. Extinct d. Awake 4. ______ A volcano that hasn’t erupted in recent history, but could erupt is classified as a. Active b. Extinct c. Dormant d. Sleeping 5. ______ A volcano that will never erupt again is considered a a. Dormant b. Extinct c. Active d. Dead 6. ______ An area where material from deep within the mantle rises and then melts, forming magma is called a e. f. g. h. Magma pool Hot Spring Chamber Hot Spot 7. ______ When groundwater is heated in hot rock near shallow magma bodies a ______ can form a. b. c. d. Batholith Dike Geyser Volcano 8. ______ When magma heats underground water, the result may be a a. b. c. d. lava flow hot spring hot spot bath 30 9. ______ The tendency of a fluid to resist flowing is called a. b. c. d. Static Resistance Friction Viscosity 10. ______ The major ingredient in Magma is a. silica b. basalt c. Carbon Dioxide d. granite 11. ______ As a volcano erupts, what force pushes magma out of a volcano onto the surface? a. Flowing water b. The Jedi Force c. Dynamite d. The force of expanding gases 12. ______ What are two main factors that affect the viscosity of magma? a. b. c. d. Altitude and season Location and Temperature Temperature and Silica content Viscosity of all magma is the same 13. _______ As temperature of magma increases, its viscosity a. b. c. d. Increases Decreases Stays the same Hardens 14. _______ The collapse of a volcano’s magma chamber may produce a a. b. c. d. crater island arc still caldera 15. _______ Volcanic ash is a. b. c. d. smoke and fire small pieces of cooled lava burned substance dirt 31 True or False. Circle whether the state is true or false. 16. True or False. A volcano is a weak spot in the Earth’s crust where molten material comes to the surface 17. True or False. Yellowstone National Park marks a hot spot under the North American plate. 18. True or False. How fast lava flows depends on the properties of the magma from which it formed including its silica content and temperature. 19. True or False. Dormant volcanoes can become active at any time. Short Answer Please answer in complete sentences. What is more likely to be more hazardous — a volcano that erupts frequently, or a volcano that has been inactive for hundreds of years? Why? 32 Label Label the parts of the volcano listed below on the diagram. Magma Chamber Vent Crater Crater Vent Magma Chamber 33 Lesson 1 Assessment: Answer Key A volcano discovery Web Quest Name: _________________ Instructions: Follow each link provided (find the links in your google classroom), and answer the questions accommodating each link in complete sentences. All answers are found using these links. Be sure to click on every link provided within the simulation, and read carefully! Link 1: Introduction to Volcanism http://pbs.panda-prod.cdn.s3.amazonaws.com/media/assets/wgbh/ess05/ess05_int_volcanintro/ index.htm 1. Draw and label a diagram of a volcano. Provide a short description for each part. 34 2. The __mountain___________ that forms from layers of ___lava________ and ___tephra_______ is called a ____volcano_____________. 3. Volcanoes are classified as active, dormant, or extinct. Describe what those classifications mean. Active: the volcano is currently erupting or has erupted recently Dormant: The volcano hasn’t recently erupted but still can erupt Extinct: The volcano is unlikely to ever erupt again 4. There are 4 main types of volcanoes. How are they classified? Cinder Cone Composite Shield Lava Dome 5. What are the two primary types of volcanoes? What are the two secondary types? Why are they secondary? Two primary types are composite and shield volcanoes. Lava domes and cinder cones are secondary because they tend to form on or near primary volcanoes. 6. List one fact about each type of volcano. Draw the basic shape of each type. 7. What are the three places that volcanoes commonly occur? Hot spots, spreading centers, subduction zones 35 8. How many hot spots have been identified around the world? 50-100 9. What is Hawaii? A hot spot 10. What kind of volcanoes are associated with hot spots? What other features are associated with hot spots? Shield volcanoes and geothermal features 11. _____Spreading centers_________________________ are places where tectonic plates are moving away from one another. 12. What is much of the oceanic crust made of? Basalt 13. ___Magma______________ is the word used to describe melted or molten rock inside Earth. 14. What is magma made of? Elements, minerals, gases 15. What determines the eruption style, rock type, and volcano shape? The composition of the magma 16. List the three types of magma and what type of volcano each type comes out of. Felsic, mafic, intermediate 36 17. ____Igneous_____________ rocks are formed when molten rock cools and hardens. 18. What are the two classes of igneous rocks? Where are they found? (Below or on top of Earth’s surface?) Intrusive: Below the surface. Extrusive: Above the surface Link 2: Volcanic Eruptions and Hazards http://pbs.panda-prod.cdn.s3.amazonaws.com/media/assets/wgbh/ess05/ ess05_int_volcanerupt/02_Effusive.htm 19. _____Effusive______________ eruptions are generally considered to be gentler than explosive eruptions. What types of hazards can result from this type of eruption? List 3. Lava flows, tsunamis, volcanic gases 20. ____Explosive________________ eruptions are the most hazardous, involving large volumes of tephra and gases emitted from the volcano. What types of hazards can result from this type of eruption? List 3. Blow downs, lahars, pyroclastic flows, lava flows, volcanic gases, tephra Extra Credit (Extension for advanced students) Follow this link to a third simulation: Volcanic Features. http://pbs.panda-prod.cdn.s3.amazonaws.com/media/assets/wgbh/ess05/ ess05_int_volcanfeatr/03_Caldera.htm 21. How do we know that Yellowstone is actually a volcano? Provide details. 37 Geothermal activity is common around hot spots. 22. What is Devils Tower? Volcanic neck: Ancient intrusive igneous rock 38 Lesson 2 Assessment: Key Viscosity Lab Investigation Name: __________________________ What you need: * 4 small plastic cups Fill 1 cup ½ full of Nacho cheese Fill 1 cup ½ full of vegetable oil * 1 straw per person, cut in half * 1 lab tray * 1 ruler * 1 timer: phone or stopwatch Part 1 Instructions: * Each person will grab ½ of a straw. * One person at a time, place the straw into the cup of oil. * Blow bubbles like you would do with a soda. * Observe how hard you have to blow, and the force and size of the bubbles once the air gets through. * Do the same with the Nacho Cheese using your other 1/2 of the straw. Record your observations below. All group members will do this. a. Blowing in the oil: Students should note the oil was easier to blow in and it produced many bubbles. It was like blowing in water, or milk, or soda etc. b. Blowing in the nacho cheese: Due to the thickness of nacho cheese, it took more effort to blow in it. It produced only one big hole. 39 Part 2 Instructions: * One team member will be the pourer, while another is the timer. * The pourer will first grab the cup with vegetable oil. Holding the ruler vertically (either person can hold the ruler), the pourer will hold the cup approximately 12 inches above an empty cup. * The timer will begin the timing as soon and the pourer begins to pour the oil into one of the empty cups. * The timer will stop the stopwatch as soon as the cup of oil is empty. Record this time in the table below. * Repeat steps 3-5 with the nacho cheese and the other empty cup. * Get some chips and eat your cheese if you want! Liquid Time in Seconds Oil Nacho Cheese Answer the questions below. 1. Describe your flow-test results. Why did you get the results you did? The oil flowed much quicker than the nacho cheese. This is because the nacho cheese is thicker than the oil. 2. Is the viscosity of the oil higher or lower than the nacho cheese? How do you know? The oil has a lower viscosity because it flows faster and is less sticky. 3. One way to decrease the viscosity of a liquid is to ___Heat_______ (heat/cool) the fluid? 4. What factors affect the viscosity of a substance? Temperature and chemical structure 40 5. What would happen to the viscosity of the oil and the nacho cheese if you heated it up? What if you cooled it down? The viscosity of both the oil and nacho cheese would be lower if heated, and higher if cooled down. 6. Can magma have different viscosities? What influences the viscosity of magma? (conduct research if you need to) Yes, magma can have different viscosities. The temperature of the magma, and the chemical structure, including the silica content, influences the viscosity of magma. 7. If magma in a volcano has a high viscosity, would the eruption be quiet or explosive? Why? (Think of how the fluids reacted to you blowing air into them) The eruption would be explosive. This is because it is thicker, which makes it more difficult for the gases to escape. The gases build up, and when they finally break through it is more explosive. 8. Could viscosity affect how often a volcano erupts? Why? Yes. When magma has a higher viscosity, the gas and pressure need to build up over time before there is enough force to break through. 9. What are some dangers of a volcanic eruption with high viscosity magma? High viscosity magma means the eruption will be more explosive. This could cause pyroclastic flows, falling rock, landslides etc. 10. What are some dangers of a volcanic eruption with low viscosity magma? This magma is thinner and less sticky. An eruption could cause a faster lava flow and can cover a lot of area in a short amount of time. Bonus: Do you prefer mashed potatoes with low or high viscosity? Explain. 41