rocks

Question 1

Rocks:

Answer 1

Natural aggregates of minerals

Question 2

Rocks: Natural aggregates of minerals

Answer 2

a. classification based on:
1. composition- amount and kind of minerals.
2. texture - size and shape of mineral grains.
3 fabric- mineral grain connections.

b. mineralogy - study of minerals
c. petrology - study of rocks
d. other definitions: 1. rock.. 2 stone.
e. types of rocks: classification based on orgin.

Question 3

rock ( engineer)

Answer 3

naturally accurring, hard, permanent material, requires blasting to excavate, durable for erosion control

Question 4

stone

Answer 4

rock removed from a site for building material

Question 5

type of rocks: classification based on origin

Answer 5

1. igneous - cooling of magma
2. metamorphic - changed from other rock
   3 sedimentary - accumulation and cementation of sediments. ( transformed, preexisting rocks by heat, pressure of chemically ACTIVE FLUID)

Question 6

igneouse rocks

Answer 6

a. volcanic ( extrusive) - cool near earth surface; fine- grained.
b. plutonic ( intrusive) - cool beneath the surface; coarse grained
c. composition - silicate minerals and interlocking grain fabrics

Question 7

sedimentary rocks

Answer 7

a. accumulation and cementation of sediments
b. or by chemical precipitaion
c. composition: non silicates and quartz and clays & granular fabric.

Question 8

Metamorphic rocks

Answer 8

a. many are foliated ( minerals in layers)

b. composition - mainly silicates and interlocking fabric.

Question 9

rock cycle

Answer 9

ricks change through time