Lava & Magma
Types of Volcanoes
Sedimentary
Volcano/Plate Wild Card
Algebra
100
__________ is molten rock found below the Earth's surface.
What is magma
100
A volcano that is erupting today is considered to be ________.
Active.
100
What are sediments?
Very small fragments of rock.
100
At the top of Mount Everest, scientists have found marine fossils. How did this occur?
There was once an ocean between the continents of India and Eurasia. The Indian plate "crashed" into the Eurasian plate and uplifted the ocean floor, creating the Himalayas.
100
Solve for a. 6a = 42
a = 7
200
When magma has more silica, it becomes more __________.
Viscous
200
A volcano that has not erupted for a period of time, yet scientists still think that it will erupt in the future.
What is dormant.
200
When rocks break apart due to different weather events, this is called __________.
Weathering
200
What type of volcano is Mt. St. Helens?
Strata or composite.
200
Solve for x. 1/4x = 5
x = 20
300
How does lava that is less viscous tend to move/ travel?
It flows easily.
300
A volcano created by low-silica lava that cools to form gradual-sloped layers is call a ____________ volcano.
Shield
300
The wearing away and transportation of rock by wind or water is called ______________.
Erosion
300
The Indian plate and Eurasian plate are moving towards one another. What type of plate boundary is this? (What is the movement called).
Convergent.
300
There are "c" students in Mrs. Cahoon's room. There are 15 students in Ms. Spence's room. Let "t" represent the total number of students. Express t in terms of c.
t = c + 15
400
Pahoehoe and aa are two types of lava that are found at what type of volcano?
A shield volcano.
400
When a volcano creates layers of ash and silica-rich lava, this layering forms a _____________ volcano.
Strata or composite
400
Which of the three sediments types we learned about is considered the "coarsest" (largest grains).
Sand
400
Scientists noticed that the more northern Hawaiian Islands were very green, while the more southern islands were more rocky (less vegetation). Why is this?
The older islands are no longer active volcanoes. This is because the tectonic plate has moved them off of the hot spot.
400
Yesterday Sarah drew a certain number of countries on her memory map. Today she added 12 more countries. She now has 27 countries all together. Write (or say) an algebraic equation and solve to find how many countries she had yesterday.
x + 12 = 27 - 12 -12 x = 15
500
What does pahoehoe lava look like when it cools?
Rope or string like "ripples."
500
Besides lava, name TWO THINGS that occur from a volatile eruption where there has been a high level of pressure build up, and there are high silica levels in the lava.
pyroclastic flows, earthquakes, landslides, rock bombs, release of gases, pumice and ash released in air.
500
What two things need to happen in order for sedimentary rock to form?
1. The layering of sediments. 2. Pressure (over time).
500
Lighter rocks (like pumice) are created because the lava contained _________ silica.
More
500
Joey spend 2/5 (two fifths) of his allowance on a jacket. The jacket cost him $12. Write an algebraic expression and solve to find how much money Joey originally had.
2/5x = 12 divide by 2/5 x = 30 $30
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