DOL Types of Rocks 3-4-25

1.  Geologists have classified rocks into three major groups of rocks which are:

• igneous, sedimentary, metamorphic
• volcanic, crystalline, organic
• basaltic, clastic, foliate
• granite, limestone, shale

Granite is a type of rock. when melted rock cools below the Earth's surface, it can form granite. Granite comes in many colors. It is usually made of large mineral grains. What type of rock is granite?

• Sedimentary rock
• Metamorphic rock
• Igneous rock
• Organic rock

What is the difference between extrusive and intrusive igneous rock?

Extrusive=

Intrusive=

Answer explanation

Extrusive=above ground

Intrusive=below ground

Both igneous rock.

Which diagram below shows an area where smooth igneous rocks are most likely to be found?

• A

• B

• C

• D

In which set are the rock drawings labeled with their correct rock types?

• 1

• 2

• 3

• 4

A teacher showed her class the three images shown below and asked the students to identify what type of rock each one was and how they were formed. 

A group of students were debating on which images were of sedimentary rocks. 

Student A states: “All three images are of sedimentary rocks; they all look like they were compacted or cemented.” 

Student B states: “I think only image Y is a sedimentary rock because it has layers.”

Student C states: “Only image Z is sedimentary rock because it has fossils.” 

• Student A

• Student B

• Student C