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Volcanoes and Earthquakes

Total questions: 26

Worksheet time: 15mins

Name
Class
Date
1.

What is the difference between magma and lava?

a)

lava is magma but it is on the surface of the Earth

b)

lava is the chamber that magma flows

c)

lava is the Earth's crust

d)

lava has a different chemical composition than magma

2.

How is viscosity & density affected when a fluid is heated?

a)

viscosity increases & density increases

b)

viscosity decreases & density decreases

c)

viscosity decreases & density increases

d)

temperature has no affect on viscosity or density

3.

Viscosity can best be described as?

a)

A liquid's resistance to flow.

b)

a liquids flow.

c)

How thin a substance is

d)

How thick a substance is

4.
The epicenter of an earthquake is
a)
The point below the surface where rock begins to break and the first motion occurs
b)
The seismic station closest to the earthquake
c)
The place where the greatest damage occurs
d)
The point on the surface directly above the focus
5.
What types of landscapes are featured near or with volcanoes?
a)
Uplifts, Erosion, and Weathering
b)
Hot Spots and Flood Basalts
c)
Vents, Craters, and Calderas
d)
Batholiths, Stocks and Sills
6.
What is letter B in the picture?
a)
Magma Chamber
b)
Crater
c)
Vent
d)
Conduit
7.

What is a intrusive igneous feature that is parallel to the rock layers it intrudes?

a)

Sill

b)

Batholith

c)

Dike

d)

Volcanic neck

8.

Composite volcanoes otherwise known as stratovolcanoes are associated with...

a)

Explosive volcanic eruptions

b)

quiet volcanic eruptions

9.

The strength of an earthquake is measured using a device called

a)

Sonar

b)

Magnetometer

c)

Seismograph

d)

Richter Scale

10.

Commonly refereed to as the depth of an earthquake

a)

Epicenter

b)

Focus

11.
Why does magma tend to rise to the surface?
a)
It has large amounts of silica.
b)
It contains very little silica.
c)
It is denser than the surrounding material.
d)
It is less dense than the surrounding material.
12.
What are solid rock fragments that are ejected during a volcanic eruption?
a)

Lahar

b)
Magma
c)
Pyroclastic Material
d)
Silica
13.

Water is an example of a...

a)

Low viscosity liquid

b)

High viscosity liquid

14.
As the temperature of lava increases, ________
a)
its viscosity decrease
b)
it begins to harden
c)
its viscosity increases
d)
it can flow a much short distance
15.
The composition of magma determines its _____.
a)
viscosity
b)
darkness
c)
color
d)
none of the above
16.
What factor(s) determine(s) whether an eruption will be explosive?
a)
The amount of gases in the magma
b)
The amount of silica in the magma
c)
The amount of gas and silica in the magma
d)
None of these affect the explosiveness of the volcano
17.
Very explosive volcanoes tend to have
a)
Low viscosity magma
b)
Gases rich in sulfur dioxide
c)
gentle, sloping sides
d)
High viscosity magma
18.

Effusive volcanos generally have

a)

thick slow lava flows

b)

giant pyroclastic explosions

c)

runny lava flows

19.
Which type of rock results from melting and cooling of magma?
a)
Igneous
b)
Metamorphic
c)
Sedimentary
d)
Extrusive
20.
Which type of rock forms from extreme heat and pressure?
a)
Igneous
b)
Sedimentary
c)
Organic
d)
Metamorphic
21.
The color of a mineral in powder form is called the mineral's 
a)
hardness
b)
specific gravity
c)
luster
d)
streak
22.
How light reflects off of a mineral is called the mineral's 
a)
luster
b)
streak
c)
cleavage
d)
fracture
23.
How do you test the hardness of a mineral? 
a)
Throw it against a wall
b)
Step on it
c)
Scratch Test
d)
Kick it until it breaks
24.
Why is coal not a mineral?
a)
It's not a solid
b)
It is man-made
c)
It is not inorganic
d)
It is made of carbon
25.
What mineral is salt?
a)
quartz
b)
sulfur
c)
halite
d)
calcite
26.
A naturally occurring, inorganic solid with a crystal structure and a definite chemical composition is referring to
a)
density
b)
streak
c)
mineral
d)
non silicate mineral

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