Chapter 3b

Question 1

Sedimentary rocks

Answer 1

• They are formed from particles of pre-existing rocks or previously dissolved material or biological activity
• 75% of land and almost all of the ocean floor is covered in sediment or sedimentary rocks,
• Sedimentary is the only place you can find fossils or fossil fuels

Question 2

Thanks for the flashcards :)

Answer 2

Keep being awesome.

Question 3

What process makes Sedimentary rocks?

Answer 3

Chemical and mechanical weathering; break up of rock

Lithification is the process then to cement or compaction the particles together

Question 4

What is chemical weathering?

Answer 4

Soluble material carried by running water

-Temperature or chemical change —> Deposit —> Lithification

Question 5

Waht is mechanical weathering?

Answer 5

Solid particles moved by wind, water, ice, etc.

-Carrying agent loses velocity —> Deposit —> Lithification

Question 6

What is a detrital sedimentary rock made of?

Answer 6

Solid particles from other rocks

Question 7

What is a chemical sedimentary rock made of?

Answer 7

Previously dissolved or biological activity*

*missing something in my notes..

Question 8

What is an organic sedimentary rock made of?

Answer 8

Plant material

-coal

Question 9

Detrital is classified by what?

Answer 9

Particle size
Largest- Boulder\
     V       Cobble   \ Gravel
     V       Pebble   / 
     V       Granule/
     V       Sand - 1/16 mm to 2mm
     V       Silt  \ Mud
     V       Clay/
Smallest

Question 10

Detrital is classed by what?

Answer 10

Particle size
Largest- Boulder\
     V       Cobble   \ Gravel
     V       Pebble   / 
     V       Granule/
     V       Sand - 1/16 mm to 2mm
     V       Silt  \ Mud
     V       Clay/
Smallest