Class 7 Science MCQ Soil

Question : Different layers of the soil differs in feels colours, depth and chemical composition are:

(a) horizons
(b) soil profile
(c) weathering
(d) can’t say

Question : What kind of soil should be used for making matkas and surahis ?

(a) clayey soil
(b) loamy soil
(c) sandy soil
(d) can’t say

Question : The forumla used to calculate the rate of percolation is:

(a) percolation rate = amount of water (ml) percolation time (min)
(b) percolation rate = amount of water X percolation time 1
(c) percolation rate = amount of water X percolation time
(d) none of these

Question : The rotten dead matter in the soil is called:

(a) organic matter
(b) sand
(c) humus
(d) silt

Question : The uses of soil are:

(a) soil gives crop
(b) soil gives support to buildings
(c) toys can be made from soil
(d) all of these

Question : Soil best suited for cultivation of wheat, rice and sugarcane is

(a) Alluvial soil
(b) Laterite soil
(c) Mountain soil
(d) None of these

Question : Which of the following type of soil will form a colloidal solution when suspended in water?

(a) Clay
(b) Silt
(c) Sand
(d) Gravel

Question : Humus and the smallest particles of rock form the upper layer of soil called:

(a) parent rock
(b) sub soil
(c) top soil
(d) none of these

Question : Soil is formed from the parent rock material by a very slow and gradual process called:

(a) processing
(b) weathering
(c) breaking
(d) cutting

Question : The uppermost layer of earth’s crust, in which plants grow is:

(a) soil
(b) land
(c) water
(d) none of these

Question : The uses of soil are:

(a) soil gives crop
(b) soil gives support to buildings
(c) toys can be made from soil
(d) all of these

Question : Soil is polluted by:

(a) air
(b) water
(c) polythene bags
(d) none of these

Question : Which type of soil retains the least amount of water ?

(a) sandy soil
(b) loamy soil
(c) clayey soil
(d) none of these

Question : Rain water can be percolated by making:

(a) big holes
(b) small holes
(c) tanks
(d) wells

Question : Wind, rainfall,’temperature, light and humidity affect the:

(a) soil
(b) water
(c) air
(d) mountains

Question : Loamy soil is most suitable for planting:

(a) rice crop
(b) pulses crop
(c) cotton crop
(d) all of these

Question : The removal of land surface by water, wind or ice is known as:

(a) soil erosion
(b) horizons
(c) humus
(d) rocks

Question : The hard layer of rocks below the C horizon is called:

(a) bottom rock
(b) substratum
(c) bed rock
(d) gravel

Question : The proportion of sand, silt and clay in a soil sample determines

(a) structure
(b) texture
(c) nutrient potential
(d) fertility level

Question : Soil carried from else where and deposits them in the:

(a) substratum
(b) B horizon
(c) C horizon
(d) transported soil

Question : One of the following is not a type of soil. This one is

(a) loamy soil
(b) silty soil
(c) clayey soil
(d) sandy soil

Question : Which type of soil will allow water to reach a well faster and in greater amount ?

(a) clayey soil
(b) sandy soil
(c) loamy soil
(d) none of these

Question : Cotton is grown in

(a) Clayey soil
(b) Loamy soil
(c) Laterite soil
(d) Sandy loam soil

Question : Soil carried from else where and deposits them in the:

(a) substratum
(b) B horizon
(c) C horizon
(d) transported soil

Question : Rain water washes off minerals and deposits them in the:

(a) substratum
(b) B horizon
(c) C horizon
(d) R horizon

Question : Which soil is found in the fertile plains of Punjab and Uttar Pradesh ?

(a) red Soil
(b) black soil
(c) alluvial soil
(d) leteritic soil

Question : The colour of red soil is due to presence of:

(a) minerals
(b) iron oxide
(c) vitamins
(d) none of these

Question : Bacteria, fungi, algael and tiny organisms called:

(a) humus
(b) protozoans
(c) biota
(d) all of these

Question : The best kind of soil for plant growth is:

(a) loamy soil
(b) clayey soil
(c) sandy soil
(d) all of these

Question : To improve the capacity to hold water ……………………. is added to the soil:

(a) rocks
(b) humus
(c) gravel
(d) sand

Question : Breaking down of rock to form soil is caused by:

(a) water
(b) air
(c) temperature
(d) all of these

Question : Cause of soil erosion is:

(a) less rainfall
(b) excess of vegetation
(c) lack of vegetation
(d) plenty of rocks

Question : Humus is present in:

(a) bad rock
(b) gravel
(c) topsoil
(d) subsoil

Question : Humus is made up of:

(a) inorganic matter
(b) loose soil
(b) sub soil
(c) gravel
(d) bad rock

Question : Fertility of soil is increased by the presence of:

(a) bacteria
(b) fungi
(c) insects
(d) all of these

Question : aerates the soil and allows the air to reach the roots of plants:

(a) earthworm
(b) becteria
(c) fungi
(d) virus

Question : 1.
For growing pulses the soil required is:

(a) sandy
(b) clayey
(c) loamy
(d) all of these

Question : Which of these has the smallest size of particles:

(a) sand
(b) clay
(c) silt
(d) gravel

Question : What kind of soil is best for growing cotton ?

(a) sandy
(b) clayey
(c) loamy
(d) loamy-sandy

Question : Humus and the smallest particles of rock form the upper layer of soil called:

(a) parent rock
(b) sub soil
(c) top soil
(d) none of these

Question : ……………………. contains the smallest particles and feels very smooth.

Question : In addition to the rock particles, top soil also has small stones called …………………….

Question : ……………………. has a lot of sand and a little silt and clay.

Question : ……………………. is our most important natural resources.

Question : ……………………. is a mixture of sand, silt and clay and also humus in it.

Question : ……………………. soils rich in clay and organic matter.

Question : ……………………. is the mixture of rock particles and humus.

Question : ……………………. is the rotting dead matter in the soil.

Question : ……………………. is breaking down of use pieces of rock into smaller pieces.

Question : ……………………. is formed by humus and the smallest particles of rock.

Question : ……………………. is below the top soil and it contains mostly rock bits and some nutrients.

Question : ……………………. has the largest size particles can easily be seen.