(a) To what type of rock do each of specimens D, E, and F belong?
(b) State the types of weathering caused by each of specimens G, H, and 1
(c) Give two ways by which weathering causes each of specimens G, H, and I.
(d) State three ways in which specimen D is important to agriculture
(a) (i) D is an igneous rock
(ii) E is a sedimentary rock
(ii) F is an igneous rock
(b) Specimen G (Earthworm) - Physical/mechanical
Specimen H (Water) - Physical and Chemical
Specimen I (Ice Block) - Physical / mechanical
(c) Specimen G burrows into rocks and creates wide cleavages which cause rocks to disintergrate into smaller particles and
this creates room for water and air which aid rock disintegration.
Specimen H dissolves to form weak acids that dissolve rock particles and attaches H and OH ions to some compounds to
form minerals. Running water drags rock particles along and these collide with themselves and wall and thus breakdown.
The force of running water pulls away rock particles from embankments/floor of channels.
Specimen I - conversion of water into ice results in increase in Volume and pressure exerted within the rock causes it to
crack and fall apart. Also movement of ice along a path leads to further dislodgement of particles.
(d) -It forms soil when weathered.
-It serves as a source of soil nutrients/elements.
-It can be pilled up and used to check erosion.
-It can be used to construct farm structures.
-It can also be used to construct access roads.
-It can also damage tools when in use.
Contributions ({{ comment_count }})
Please wait...
Modal title
Report
Block User
{{ feedback_modal_data.title }}