Rocks
Practice Test
1.
Extrusive rocks __________.
a.
have large mineral grains and are formed beneath Earth's surface
b.
have small mineral grains and are formed on top of 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.
Igneous rocks __________.
a.
are the rarest rocks found on Earth
b.
are found mostly on the surface
c.
are the most commonly found rocks on Earth
d.
are formed in the same way as sedimentary rocks
Hint
3.
What is rock salt used for?
a.
glass and paper
b.
soap
c.
diary products
d.
all answers are correct
Hint
4.
Why are some rocks called intermediate rocks?
a.
They are formed within felsic and mafic rocks.
b.
Their size is generally smaller than felsic, but larger than mafic rocks.
c.
They are found between felsic and mafic rocks.
d.
They have mineral compositions between felsic and mafic rocks.
Hint
5.
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
6.
Igneous rocks can be __________.
a.
intrusive or extrusive
b.
only intrusive
c.
neither extrusive nor intrusive
d.
only extrusive
Hint
7.
How are igneous rocks formed?
a.
They are formed from cooled magma.
b.
They are formed over many years of pressure and heat within Earth.
c.
They are hot magma the moment it is expelled from a volcano.
d.
They are formed from sediments that collected in ocean beds.
Hint
8.
Nonfoliated rocks__________.
a.
are metamorphic and exhibit layering
b.
are metamorphic but do not exhibit layering
c.
are not classified as metamorphic
d.
are formed only in the northern hemisphere
Hint
9.
Why are mafic rocks dark?
a.
because they contain large amounts iron and magnesium
b.
because they contain large amounts of sodium
c.
because they have been scorched by high temperatures
d.
because they contain large amounts of silica
Hint
10.
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 perpendicular to each other.
c.
has mineral grains that form no distinct pattern
d.
has mineral grains that have lined up in parallel lines
Hint
11.
When minerals act like glue to hold sediments together this is called __________.
a.
filtration
b.
mineralization
c.
fermentation
d.
cementation
Hint
12.
A rock is a (an) __________.
a.
atom
b.
compound
c.
mixture
d.
element
Hint
13.
What are sedimentary rocks made of?
a.
all answers are correct
b.
They are made of the remainders of volcanic activity.
c.
They are formed only underwater.
d.
They are made from almost any matter found in nature.
Hint
14.
Why does magma rise to the surface?
a.
because magma is less dense than the surrounding rock
b.
because the rocks actually move and force the magma out
c.
because magma is less dense than lava
d.
because magma is more dense than the surrounding rock
Hint
15.
Why do chemical sedimentary rocks have a non-clastic texture?
a.
because they're not made from pieces of other rocks
b.
because they are made from volcanic rock
c.
because they are made from pieces of other rocks
d.
because they are made from igneous rocks
Hint
16.
What does the term
rock removal
mean?
a.
Rock carried away by the wind or water is lost from Earth forever.
b.
The rock cycle removes rock by creating or destroying matter.
c.
Rock may be carried away by the wind or water, but it is never lost.
d.
Chemical elements that make up minerals and rocks are destroyed through erosion.
Hint
17.
Intrusive rocks __________.
a.
have small mineral grains and are formed beneath Earth's surface
b.
have small mineral grains and are formed on top of Earth's surface
c.
have large mineral grains and are formed beneath Earth's surface
d.
have large mineral grains and are formed on top of Earth's surface
Hint
18.
Weathering is an example of what kind of breakdown?
a.
only mechanical
b.
chemical and physical
c.
chemical and mechanical
d.
only chemical
Hint
19.
What are rocks that have changed due to temperature and pressure called?
a.
metamorphic rocks
b.
lava rocks
c.
igneous rocks
d.
sedimentary rocks
Hint
20.
Why can't humans just make more fossil fuels like coal?
a.
because we're not sure what coal is made from
b.
because we're not sure how coal is made
c.
because coal is formed from synthetic materials that humans don't have access to
d.
because coal is formed over millions of years of compacting materials within Earth
Hint
