Year 8 Science Geology
Unit Test
NAME:
________________________________________________________________
PART A: The following diagram is a representation of the rock cycle. While it
contains all the same information as the rock cycle diagram we used in class, it does
look a little different.
Study it closely and answer the following questions.
1.) What is the process shown by letter A?
a.) extrusion
b.) weathering and erosion
c.) crystallization
d.) intrusion
2.) According to the diagram, what type of rock(s) may change to magma and
lava?
a.) any type of rock
b.) metamorphic rock only
c.) sediments
d.) igneous rock only
5) Fossils are found mainly in which type of rocks?
a) igneous
b) sedimentary
c) metamorphic
d) magma
4.) Which path must a rock take once it is in the rock cycle?
a.) From sedimentary rock to metamorphic rock
b.) From igneous rock to sedimentary rock
c.) Magma cooling into igneous rock
d.) Any path in the rock cycle since no rock travels the same path through the rock
cycle
5.) Which of the following is a good definition of erosion?
a.) the movement of sediment from one location to another
b.) the breaking down of rocks into smaller parts
c.) the breaking down of rock and movement of these sediments
d.) the compaction and cementation of sediments to form rock
6.) Which of the following helps create both metamorphic and sedimentary
rocks?
a.) cementation
b.) evaporation
c.) pressure
d.) heat
7.) From what type of rock can metamorphic rocks be formed?
a.) igneous rocks
b.) sedimentary rocks
c.) metamorphic rocks
d.) all rock groups
8.) Since such a large portion of Earth's surface is exposed to water, what type
of rocks are found all over the world?
a) igneous
b) sedimentary
c) metamorphic
d) magma
9.) Which type of rocks are made from small pieces of other rocks?
a) igneous
b) sedimentary
c) metamorphic
d) magma
10.) What are two factors are necessary to form metamorphic rock?
a) Sun and pressure
b) Heat and pressure
c) Pressure and lava
d) Sediments and lava
PART B Rock identification
1. Study the two photos below of two igneous rocks. Which rock (A or B) cooled
above ground
2. Which rock (A or B) cooled above ground
3. Explain your answer.
Rock SAMPLE A
Rock SAMPLE B
Study the 4 rock samples below.
Identify each one as either SEDIMENTARY, IGNEOUS or METAMORPHIC and give
one reason you were able to identify the category of each rock.
Rock SAMPLE C
Rock SAMPLE C
Rock SAMPLE C
Rock SAMPLE C
True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the
statement true.
____
1. Sedimentary rocks form from rock and mineral fragments, and metamorphic rocks form from
existing rock. _______________
____
2. Studying a rock’s texture can help scientists determine which type of rock it is.
_______________
____
3. Textures are fragments that make up rocks. _______________
____
4. Deposition is a tectonic process that forces rocks onto Earth’s surface throughout the rock
cycle. _______________