Indiana Science Grade 7

Chapter 18: Rocks

Rocks

1.
Why does magma rise to the surface?
A)because magma is more dense than the surrounding rock
B)because magma is less dense than lava
C)because the rocks actually move and force the magma out
D)because magma is less dense than the surrounding rock
2.
Nonfoliated rocks__________.
A)are not classified as metamorphic
B)are metamorphic and exhibit layering
C)are metamorphic but do not exhibit layering
D)are formed only in the northern hemisphere
3.
Weathering is an example of what kind of breakdown?
A)chemical and mechanical
B)only mechanical
C)only chemical
D)chemical and physical
4.
Igneous rocks can be __________.
A)neither extrusive nor intrusive
B)only intrusive
C)intrusive or extrusive
D)only extrusive
5.
Felsic rocks are __________.
A)all answers are correct
B)rocks that have a high concentration of silica
C)light colored rocks
D)igneous rocks
6.
Why are some rocks called intermediate rocks?
A)They are formed within felsic and mafic rocks.
B)They are found between felsic and mafic rocks.
C)They have mineral compositions between felsic and mafic rocks.
D)Their size is generally smaller than felsic, but larger than mafic rocks.
7.
A rock is a (an) __________.
A)compound
B)atom
C)mixture
D)element
8.
How are igneous rocks formed?
A)They are hot magma the moment it is expelled from a volcano.
B)They are formed from cooled magma.
C)They are formed over many years of pressure and heat within Earth.
D)They are formed from sediments that collected in ocean beds.
9.
Sedimentary rocks __________.
A)all answers are correct
B)form from existing rocks
C)form when sediment is pressed together
D)often form in layers
10.
The rock cycle suggests that __________.
A)rocks disappear from Earth as they go underground
B)rocks always stay in the same form
C)rocks are continually recycled into different forms
D)rocks are always being added to Earth's mass
11.
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 over millions of years of compacting materials within Earth
C)because coal is formed from synthetic materials that humans don't have access to
D)because we're not sure what coal is made from
12.
How is shale transformed into slate?
A)Shale cools on Earth's surface.
B)Shale collects at the bottom of lakes.
C)Shale cools within Earth's surface.
D)Shale undergoes intense pressure and temperature changes within Earth.
13.
What are rocks that have changed due to temperature and pressure called?
A)metamorphic rocks
B)igneous rocks
C)lava rocks
D)sedimentary rocks
14.
When minerals act like glue to hold sediments together this is called __________.
A)filtration
B)cementation
C)fermentation
D)mineralization
15.
Igneous rocks __________.
A)are the most commonly found rocks on Earth
B)are formed in the same way as sedimentary rocks
C)are the rarest rocks found on Earth
D)are found mostly on the surface
16.
Why do chemical sedimentary rocks have a non-clastic texture?
A)because they are made from igneous rocks
B)because they are made from volcanic rock
C)because they are made from pieces of other rocks
D)because they're not made from pieces of other rocks
17.
Extrusive rocks __________.
A)have small mineral grains and are formed beneath Earth's surface
B)have large mineral grains and are formed beneath Earth's surface
C)have small mineral grains and are formed on top of Earth's surface
D)have large mineral grains and are formed on top of Earth's surface
18.
What does the term rock removal mean?
A)The rock cycle removes rock by creating or destroying matter.
B)Rock may be carried away by the wind or water, but it is never lost.
C)Chemical elements that make up minerals and rocks are destroyed through erosion.
D)Rock carried away by the wind or water is lost from Earth forever.
19.
Intrusive 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
20.
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
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