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1(a)(i)Define the term rock. (ii)Outline the steps necessary for the formation of mechanically formed sedimentary rocks. (b)Explain three ways metamorphic rocks are formed. (c)State four conditions necessary for...

      

(a)(i)Define the term rock.
(ii)Outline the steps necessary for the formation of mechanically formed sedimentary rocks.
(b)Explain three ways metamorphic rocks are formed.
(c)State four conditions necessary for the formation of coral rocks.
(d)You plan to conduct a field study on rocks around your school environment.
(i)State three methods of data collection you would use.
(ii)Give three reasons for conducting a pre-visit.
(iii)Identify three activities you would carry out during the field study.

  

Answers


Seline
(a)(i)A rock is an agglomeration of mineral particles found within the earth's crust.
(ii)Particles are broken from existing rocks.
The particles are carried by wind/water.
These particles are laid down in layers.
Over years the layers harden/compact to form a rock.

(b)Dynamic metamorphism-when the weight of the overlying rock layers create pressure the rock at the lower layer get changed minerals are realigned.
Thermal/contact-During volcanicity hot magma come into contact with the country rock the heat recrystaline the minerals to form new ones.
Thermo-dynamism -During folding rocks are folded deep under the earth surface where they come into contact with hot magma at the mantle and the pressure of the folds change.
(c)warm ocean (20-29°c).
Shallow water up to 60 m deep.
Salt ocean water.
Clear/silt free water.
(d)(i)Observation.
Digging.
Photographing.
Collecting rock samples.
(ii)To identify possible problems.
To help identify methods of data collection and recording.
To help choose required tools and equipments.
To help identify the route map.
(iii)Feeling the texture of the rocks.
Hitting/breaking the rocks.
Carrying/labelling rock samples.
Digging out rocks.
Belan answered the question on March 2, 2019 at 17:05


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