Rocks
Practice Test
1.
Extrusive rocks __________.
a.
have small mineral grains and are formed on top of Earth's surface
b.
have large mineral grains and are formed beneath Earth's surface
c.
have small mineral grains and are formed beneath Earth's surface
d.
have large mineral grains and are formed on top of Earth's surface
Hint
2.
How are igneous rocks formed?
a.
They are hot magma the moment it is expelled from a volcano.
b.
They are formed from sediments that collected in ocean beds.
c.
They are formed over many years of pressure and heat within Earth.
d.
They are formed from cooled magma.
Hint
3.
What does the term
rock removal
mean?
a.
Rock carried away by the wind or water is lost from Earth forever.
b.
Rock may be carried away by the wind or water, but it is never lost.
c.
The rock cycle removes rock by creating or destroying matter.
d.
Chemical elements that make up minerals and rocks are destroyed through erosion.
Hint
4.
What are sedimentary rocks made of?
a.
They are made of the remainders of volcanic activity.
b.
all answers are correct
c.
They are formed only underwater.
d.
They are made from almost any matter found in nature.
Hint
5.
Why does magma rise to the surface?
a.
because the rocks actually move and force the magma out
b.
because magma is less dense than the surrounding rock
c.
because magma is less dense than lava
d.
because magma is more dense than the surrounding rock
Hint
6.
Igneous rocks __________.
a.
are the most commonly found rocks on Earth
b.
are found mostly on the surface
c.
are formed in the same way as sedimentary rocks
d.
are the rarest rocks found on Earth
Hint
7.
How is shale transformed into slate?
a.
Shale collects at the bottom of lakes.
b.
Shale cools on Earth's surface.
c.
Shale cools within Earth's surface.
d.
Shale undergoes intense pressure and temperature changes within Earth.
Hint
8.
A metamorphic rock with a foliated texture _________
a.
has mineral grains that have lined up in diagonal lines
b.
has mineral grains that have lined up in parallel lines
c.
has mineral grains that have lined up perpendicular to each other.
d.
has mineral grains that form no distinct pattern
Hint
9.
Why are some rocks called intermediate rocks?
a.
They have mineral compositions between felsic and mafic rocks.
b.
Their size is generally smaller than felsic, but larger than mafic rocks.
c.
They are formed within felsic and mafic rocks.
d.
They are found between felsic and mafic rocks.
Hint
10.
Weathering is an example of what kind of breakdown?
a.
only mechanical
b.
chemical and physical
c.
only chemical
d.
chemical and mechanical
Hint
11.
When minerals act like glue to hold sediments together this is called __________.
a.
filtration
b.
mineralization
c.
cementation
d.
fermentation
Hint
12.
The rock cycle suggests that __________.
a.
rocks always stay in the same form
b.
rocks are continually recycled into different forms
c.
rocks disappear from Earth as they go underground
d.
rocks are always being added to Earth's mass
Hint
13.
Why does the United States have large areas of limestone?
a.
because seas covered much of the country for millions of years
b.
because forests covered much of the country for millions of years
c.
because desert covered much of the country for millions of years
d.
because fields covered much of the country for millions of years
Hint
14.
Intrusive rocks __________.
a.
have small mineral grains and are formed on top of Earth's surface
b.
have large mineral grains and are formed beneath Earth's surface
c.
have small mineral grains and are formed beneath Earth's surface
d.
have large mineral grains and are formed on top of Earth's surface
Hint
15.
Why are mafic rocks dark?
a.
because they contain large amounts of silica
b.
because they have been scorched by high temperatures
c.
because they contain large amounts iron and magnesium
d.
because they contain large amounts of sodium
Hint
16.
Why can't humans just make more fossil fuels like coal?
a.
because we're not sure how coal is made
b.
because coal is formed from synthetic materials that humans don't have access to
c.
because coal is formed over millions of years of compacting materials within Earth
d.
because we're not sure what coal is made from
Hint
17.
Sedimentary rocks __________.
a.
form when sediment is pressed together
b.
all answers are correct
c.
often form in layers
d.
form from existing rocks
Hint
18.
Igneous rocks can be __________.
a.
intrusive or extrusive
b.
only intrusive
c.
neither extrusive nor intrusive
d.
only extrusive
Hint
19.
A rock is a (an) __________.
a.
compound
b.
atom
c.
mixture
d.
element
Hint
20.
What are rocks that have changed due to temperature and pressure called?
a.
metamorphic rocks
b.
igneous rocks
c.
sedimentary rocks
d.
lava rocks
Hint
