Unit Test — Unit test Answers

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Molten materials cool at different rates. Which property of a mineral does this affect?

A
color
B
luster
C
crystal size
D
crystal shape
2
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Which phrase describes non-foliated rocks?

A
have grains in parallel layers
B
include quartzite and marble
C
tend to split along their bands
D
form from crystallized magma
3

Which characteristic is best for identifying whether a rock is intrusive or extrusive?

A
color
B
shape
C
texture
D
weight
4

Which statement best describes the formation of metamorphic rocks?

A
Magma cools and crystallizes slowly beneath Earth’s surface.
B
Liquid lava erupts from a volcano and cools quickly at Earth’s surface.
C
Sand and gravel are deposited at the mouth of a river and, over time, form layers that solidify into rock.
D
Ancient sandstone beaches become buried deep beneath Earth’s surface, where they are exposed to extreme heat and pressure.
5

Which is a common use of minerals?

A
pasta
B
toothpaste
C
applesauce
D
wooden craft stick
6

Which rock is an example of a chemical sedimentary rock?

A
coal
B
iron ore
C
shale
D
sandstone
7

Which process begins the formation of sedimentary rock?

A
the movement of sediment
B
the cementation of rock sediment
C
the breakdown of rock into sediment
D
the buildup of sediment in one location
8

An igneous rock has a coarse texture and is dark in color. How else can this rock be accurately described?

A
small crystals
B
cooled quickly
C
produced from magma
D
formed at Earth’s surface
9

Which statement correctly describes a feature of the rock cycle?

A
Rocks are preserved through the process.
B
Rocks change from one type to another.
C
Different rock groups are not related to one another.
D
The rock cycle follows a specific order.
10

Which substance would most likely form sedimentary rock?

A
cooled lava
B
melted rock
C
changed igneous rock
D
small pebbles
11

A mineral forms in water heated by magma inside Earth.Which statement best describes this mineral?

A
The mineral formed through evaporation.
B
The mineral crystallized from molten material.
C
The mineral formed when a hot water solution cooled.
D
The mineral likely has all the same properties as the surrounding rock.
12

Which correctly lists the three agents that must be present for cementation to occur?

A
minerals, heat, sediment
B
water, minerals, sediment
C
heat, animals, plants
D
sediment, heat, animals
13

Which rock is an example of a clastic sedimentary rock?

A
shale
B
iron ore
C
rock salt
D
limestone
14

Which type of rock has a coarse texture due to slow cooling in magma chambers?

A
extrusive
B
intrusive
C
metamorphic
D
sedimentary
15

Which type of rock is most likely to form because of high heat and pressure?

A
igneous
B
magma
C
sediment
D
metamorphic
16

This image shows the rock cycle.Which event most likely occurs at point V?

Question illustration
A
cooling
B
erosion
C
heating
D
melting
17

Fran finds a dark-colored rock that she identifies as basalt. Which property gives the rock its dark color?

A
its shape
B
its banding
C
its grain size
D
its mineral content
18

A geologist finds a metamorphic rock and notices that it has grains that formed in parallel layers. The geologist pries at the rock, and it splits apart along the bands formed by the layers.Which type of rock did the geologist most likely find?

A
gneiss
B
limestone
C
marble
D
sandstone
19

Which correctly lists three properties that are used to identify minerals?

A
luster, weight, streak
B
magnetism, size, weight
C
size, weight, luster
D
streak, luster, magnetism
20

Which phrase describes how metamorphic rocks form?

A
form from melting
B
form at Earth’s surface
C
form from sediments
D
form from existing rocks

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