Rocks

Question 1

Sedimentary Rock

Answer 1

Forms from sediments

Question 2

What does it mean when a sedimentary rock is overturned?

Answer 2

Oldest layer may no longer be on the bottom;the rock is flipped or tilted

Question 3

Basaltic Rocks

Answer 3

Dense, dark colored, rich in Fe(iron) and Mg(magnesium) low in SiO2(Silca)

Question 4

Andesitic Rock

Answer 4

The mineral compositions between basaltic and granitic rocks

Question 5

Granitic Rocks

Answer 5

Light Colored rocks, lower density than basaltic, rich in SiO2(silica), low in iron and magnesium

Question 6

Extrusive

Answer 6

Fools on surface from lava, tiny crystals:cools quickly

Question 7

Intrusive

Answer 7

Form below surface, large crystals, cools slowly MAGMA

Question 8

How does magma move to surface?

Answer 8

Less dense than surrounding rocks, forced upwards

Question 9

Erosion

Answer 9

Rock sediments, caused by weathering carried away by wind, water, or ice

Question 10

3 major rock types

Answer 10

Metamorphic
Igneous
Sedimentary

Question 11

Metamorphic Rocks

Answer 11

Rocks that have undergone changes triggered by heat, pressure, or hot fluids.
Formed from any of the rock types

Question 12

What happens to the gas in volcanic glass?

Answer 12

It gets trapped, and holes are formed from the pockets of gas

Question 13

Volcanic glass

Answer 13

Magma that cooled so quickly it has few to no mineral grains formed

Question 14

Igneous rock

Answer 14

Hardened magma

Question 15

What does the rock cycle do to rocks?

Answer 15

Weathers to small rocks and to mineral grains

Question 16

What do changes in the rock cycle never do?

Answer 16

Never create or destroy matter, it just redistributes into a different form

Question 17

Texture

Answer 17

Grain size, the way they first together in a rock

Question 18

What minerals do common rocks have?

Answer 18

Quartz, feldspar, mica, calcite

Question 19

How are rocks classified?

Answer 19

By shape, chemical composition, grain size

Question 20

Grains

Answer 20

Fragments that make up a rock

Question 21

Rock

Answer 21

Naturally occurring solid mixture of 1+ minerals and organic matter

Question 22

Metamorphic process

Answer 22

Pressure comes from rock layers above

Temp increases with depth

Heat+pressure is right, rock melts to form magma

Question 23

Foliares texture

Answer 23

When mineral grains in a rock arrange in parallel layers

Question 24

Nonfoliated texture

Answer 24

Mineral grains grow+rearrange, don’t form rock layers

Question 25

Weathering

Answer 25

Breaks down rock chemically+mechanically when exposed to air, water, ice

Question 26

Compaction

Answer 26

Sediments stick together to form solid rock because of the pressure

Question 27

Cementation

Answer 27

Sediments stick together because of deposited minerals between the pieces of sediment

Question 28

Detrital sedimentary rocks

Answer 28

Made from broken fragments of other rocks

Question 29

Chemical sedimentary rocks

Answer 29

Form when dissolved minerals come out of a solution

Question 30

Organic (biochemical) sedimentary rocks

Answer 30

Rocks made out of once living things, sealife

Question 31

Sediments

Answer 31

Rock fragments, bits of shell, mineral grains