The Rock Cycle and Properties of Rocks

Question 1

what is weathering

Answer 1

the process that break down rock

Question 2

what can cause physical weathering

Answer 2

-wind
-temperature change
-water and ice
-crystallization of salts

Question 3

what can cause chemical weathering

Answer 3

-water
-acids
-oxygen
-carbon dioxide

Question 4

what can cause biological weathering

Answer 4

livinng things and yheir products

Question 5

define erosion

Answer 5

rock transported from one place to another

Question 6

what are the agents of erosion

Answer 6

water, wind, gravity or ice

Question 7

what is deposition

Answer 7

laying down of sediments

Question 8

how are igneous rocks formed

Answer 8

when magma (intrusive) or lave (extrusive) cools down an crystalizes

Question 9

characteristics of igneous rock

Answer 9

interlocking miner crystals

Question 10

how do sedimentary rocks form

Answer 10

are made up of compacted and cemented sediments

Question 11

the three types of seidmentary rocks

Answer 11

-clastic
-chemical
-biogenic

Question 12

what is clastic sedimentary rocks

Answer 12

from from clasts (small pieces) of pre-existing rock

Question 13

what is chemical sedimentary rocks

Answer 13

formed when dissolved minerals come out of water.

Question 14

what is biogenic sedimentary rock

Answer 14

formed when dead organisms are cemented together

Question 15

strata?

Answer 15

stacked-up layers of sedimentary rock

Question 16

how do metamorphic rocks form

Answer 16

intense heat and pressure alter an already existing rock

Question 17

shearing?

Answer 17

a movement of rocks slidingpast eacother

Question 18

what are the 3 types of metmorphism and what are they

Answer 18

1- regional metamorphism: when the rock went through a large area and altered by both heat and pressure
2- contact metamorphism: mostly alterd by heat
3- dynamic metamorphisn: mostly altered by pressure

Question 19

floiation?

Answer 19

when a rock develops layer (bands) with pressure

Question 20

what is hydrothermal fluids

Answer 20

super heated fluids that circle the earths crust and pick up minerals on the way

Question 21

explain the 3 processes of obtaining minerals

Answer 21

1-mining- the resource is removed from the ground
2-processing- the wanted materials extracted while unwante dmaterials removed
3- rehabilation-mining site is repaired and turned into somethinsimilar to original enviroment

Question 22

mining methods

Answer 22

1-open cut-used when mineral is neat the surface
2 -underground mining-when mineral is deep underground
3- dredging- when mineral is found in sand
4-leach mining-when fluid is sent to dissolve the mineral and so then it can be pumbed out

Question 23

smelting?

Answer 23

intense heating

Question 24

tailings?

Answer 24

waste material from mine often toxic