SUMMATIVE 2 Q-2 (Earth Science)
Quiz by MARLOU LUCERO GAYANELO
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- Q1
Magma varies widely in composition. Which is the most abundant element composition in magma?
Sodium
Silicon
Aluminum
Oxygen
60s - Q2
What is the tendency of the magma with high silica content?
It tends to be hotter.
It tends to be less explosive.
It tends to be more viscous.
It tends to be less viscous
60s - Q3
What is the effect of the magma’s high viscosity on volcanic eruption?
It has less magma emission.
It becomes more explosive.
It becomes less explosive.
It has more magma emission.
60s - Q4
Magma plays an important role in geologic processes. Which of the following best describes magma?
a molten rock
a molten rock came out to the Earth’s surface
a molten metal
a mixture of liquids and gases
60s - Q5
Which geologic process takes place inside cracks and infiltrates the upper mantle allowing liquids and gases to reach the surface of the earth?
Tectonic
Plutonism
Hydration
Volcanism
60s - Q6
Why does partial melting of rocks occur on the earth’s mantle?
Because rocks are made of metals.
Because rocks are made up of silicates.
Because rocks’ composition has different melting points.
Because rocks are pure materials.
60s - Q7
What rock is produced when the process of crystallization takes place inside the crust?
None of the above
Plutonites and Volcanites
Volcanites
Plutonites
60s - Q8
Which of the following factors affect the melting of rocks?
pressure and minerals components of a rock
temperature and minerals components of a rock
temperature and pressure
temperature, pressure and mineral components of a rock
60s - Q9
Which geologic process occurs on the earth’s surface correlated with flow and transportation of igneous material?
Plutonism
Seismic activities
Metamorphism
Volcanism
60s - Q10
Geologist found out that rocks melted under various pressures. Which of the following best describes how pressure affects the melting of rocks?
I. The higher the pressure, the lower the melting point.
II. The lower the pressure, the higher the melting point.
III. The higher the pressure, the higher the melting point.
II and III
III only
II only
I and II
60s - Q11
Which statement best describes plutonism?
A geological phenomena that occurs on the surface of the earth
A motion that takes place inside the cracks that infiltrate the upper mantle
A process correlated with the flow and transportation of igneous material towards the surface
A process where magma infiltrates the Earth’s crust but fails to make it to the surface
60s - Q12
Which igneous rock formation is produced when the process of crystallization takes place on the Earth’s surface?
Plutonites
None of the above
Plutonites and Volcanites
Volcanites
60s - Q13
What condition is ideal for metallogenesis?
magma infiltrates the Earth’s crust, fails to make it to the Earth’s surface and magma differentiation occurs.
magma differentiation occurs
magma infiltrates the Earth’s crust but fails to make it to the Earth’s surface.
magma reaches the Earth’s surface
60s - Q14
What happens during flux melting?
Rock’s melting point is reduced when mixed with some water or carbon dioxide.
Rock’s melting point is reduced when mixed with some oxygen or carbon dioxide.
Rock’s melting point is increased when mixed with some oxygen or carbon dioxide.
Rock’s melting point is increased when mixed with some water or carbon dioxide.
60s - Q15
What temperature and pressure conditions allow magma to form?
I. low pressure and low temperature
II. high pressure and low temperature
III. low pressure and high temperature
II and III
I and II
III only
I only
60s