Question

1. Gabbro is the most common extrusive igneous rock.
a. True

b. False

2. Mount St. Helens is considered to be an:
a. Extinct volcano
b. Dormant volcano
c. Active volcano

3. Cinder cones are made up from lava that was:
a. Hot and mafic
b. Cold and mafic
c. Cold and felsic
d. Hot and felsic

4. Which volcano type from the choices below can experience a Hawaiian eruption.
a. Stratovolcano/composite cone
b. Cinder cone
c. Shield volcano
d. All of these

5. Which volcano type can have mafic lava as part of its composition?
a. Shield volcanoes
b. Cinder cones
c. Stratovolcanoes/Composite cones
d. All of the above
e. Only “a” and “b”

6. Cinder cones are:
a. Entirely mafic
b. Entirely felsic
c. A mix of mafic and felsic composition

Answer 1

Answer 1) False

Gabbro is the most common extrusive igneous rock is false statement.

Gabbro is the most common intrusive igneous rock in form of coarse grained and dark colored. It is commonly found in deep oceanic crust.

Answer 2) dormant volcano

Mount St. Helens is considered to be an dormant volcano. Option 'b' is correct.

A dormant volcano is an type of volcano that is active and not erupting but supposed to erupt again in future. Mount St. Helens is a volcano located in southwestern Washington state. It is dormant volcano, formed forty thousand years back and is the most active volcano in the Cascade Range in the past ten thousand years.

Hope it does helps!!!

Note: According to CHEGG answering Guidelines I am allowed to answer only first question. Short questions  are there so I answered two questions..