Homework Practice

Printable assignment

Soil: Apply and Reason

Observe and Compare

Question 1mcq

A student labels the deepest hard rock layer as topsoil. What is the error?

A.Topsoil is always below bedrock.

B.Bedrock is a type of leaf litter.

C.The deepest hard layer is bedrock, not topsoil.

D.Soil has no layers.

Question 2mcq

Which soil has the largest particles and the biggest air spaces?

A.Clayey soil

B.Loamy soil

C.Humus alone

D.Sandy soil

Question 3mcq

Which soil usually holds the most water because of very fine particles?

A.Clayey soil

B.Sandy soil

C.Gravel only

D.Dry ash only

Question 4mcq

Why is loamy soil often good for many crops?

A.It contains only large stones.

B.It has a balanced mixture of sand, silt, clay and humus.

C.It allows no water or air to enter.

D.It is made only of salt crystals.

Question 5mcq

Water poured into Soil A passes through very quickly. Water poured into Soil B remains for a long time. Which comparison is likely?

A.Soil A is pure humus; Soil B is pure air.

B.Both soils must be identical.

C.Soil A is more sandy; Soil B is more clayey.

D.Soil A has smaller particles than Soil B always.

Reason Like a Scientist

Question 6mcq

A student says, “Clayey soil has the best aeration because it has the smallest particles.” What is wrong?

A.Small particles always create large tunnels.

B.Aeration means soil colour only.

C.Clayey soil contains no water.

D.Small particles leave smaller spaces, so aeration is usually poorer.

Question 7mcq

Which soil would be least suitable for a plant that gets damaged by waterlogging?

A.Clayey soil

B.Sandy soil with good drainage

C.Loamy soil with moderate drainage

D.Soil mixed with compost and sand

Question 8mcq

In an experiment,

100\,mL

water is poured into soil and

70\,mL

drains out quickly. What does this suggest?

A.The soil retained all the water.

B.The soil has high percolation and low water retention.

C.The soil contains no air spaces.

D.The soil must be pure clay.

Question 9mcq

Which formula gives percolation rate in a simple soil test?

ext{Percolation rate}= ext{mass}+ ext{temperature}

ext{Percolation rate}= ext{leaf area} imes ext{sunlight}

ext{Percolation rate}= rac{ ext{amount of water}}{ ext{time taken}}

ext{Percolation rate}= rac{ ext{number of roots}}{ ext{soil colour}}

Question 10mcq

Two soils receive equal water. Soil X lets water pass in

2

minutes; Soil Y takes

8

minutes. Which has slower percolation?

A.Soil X

B.Both are equal

C.Cannot be compared because time is given

D.Soil Y