Karteikarten
Rocks ✔
Karten in diesem Stapel (20)
- 1What is a sedimentary rock?Rocks that are formed from sediments are called sedimentary rocks
- 2What are sediments?small pieces of material that do not dissolve in water
- 3Where do sediments come from?Sediments have come from the weathering and erosion of surface rocks
- 4Without explaining, what are the five steps to forming sedimentary rocks? (You should have one worded answers)1. Erosion/ Weathering
2. Transportation
3. Sedimentation
4. Compaction
5. Cementation - 5Explain how sedimentary rocks are formed.1. Small pieces of rock are transported by a river
2. Pieces of rock are deposited and layers of sediment build up
3. Sediments are compacted and water is squeezed out. Crystals form, which cement the pieces of rock together - 6What holds together the particles?They are held together by natural cements, such as calcite or silica. These salts are formed when the water is squeezed out.
- 7True or False: It takes a few years for sedimentary rock to form.False.
It takes millions of years of years for sedimentary rock to form. - 8What are the sediment layers called?Strata
- 9What do pebbles become after being compressed?Conglomerate
- 10What is breccia?Breccia is a strata made up of more rougher rocks.
- 11Define cleave.cleave: to split into layers
- 12What three things must you look for to find a sedimentary rock?1. Is it made of particles?
2. Can you see layers?
3. Are there any fossils? - 13Give some examples of sedimentary rocks.-conglomerate
-breccia
-sandstone
-limestone
-mudstone - 14What are fold mountains?When Earth movements have squeezed the layers of rock into gigantic folds
- 15Fold mountain video:https://www.youtube.com/watch?v=DZp5pchnKHc
- 16Define: a) anticline b) synclinea) when the strata are pushed upwards into a dome shape
b) when strata are forced down into the shape of a bowl - 17How does a fault form?These are formed when rock layers fracture (break/separation). On one side the rock layers may slip down, shown by a break in the continuous strata.
- 18What does metamorphic mean?it means 'changed form'
- 19What is a metamorphic rock?a rock that has had its form changed by the action of high temperature
- 20How do these sedimentary rocks change after metamorphism? a. sandstone b. limestone c. mudstonea. quartzite, much harder
b. marble, much harder
c. slate, much much harder