1. 1
Grade 10 Life Sciences
Class Test 6
Surname Name
Date
Choose the substitute that best answers the question or completes the statement.
Only encircle the correct letter
Question 1 [4]
1.1. What is Soil?
a. The brown stuff on the ground.
b. Soil can be defined as the organic and inorganic material on the surface of the earth that provides the medium
of plant growth.
c. outermost shell of a terrestrial-type planet or natural satellite that is defined by its rigid mechanical properties
1.2.The soil is made up of for basic components, these are
a. Water, carbon dioxide, oxygen, salt
b. Lithosphere, mesosphere, hydrosphere, troposphere
c. Water, air, organic materials, minerals
d. Nitrogen, iron, sodium hydroxide, air
1.3 The soil type formed by the breakdown and weathering of rocks such as limestone, granite, quartz and shale
a. silt
b. sand
2. 2
c. clay
d. loam
1.4 What are the soil types that hold water but doesn’t have good aeration around the roots
a. Sand and Clay
b. Silt and Clay
c. Silt and Loam
d. Clay and Loam
Question 2 [10]
Give the correct biological terms for the following statements
2.1 The permanent destruction of forests in order to make the land available for other uses like housing and
urbanization, to harvest timber to create commercial items such as paper, furniture and homes, to create ingredients
that are highly prized consumer items, such as the oil from palm trees, to create room for cattle farming
2.2 Ability of water to flow through a substance
2.3 Ability of the soil to hold water (inversely related to porosity)
2.4 Molecules dissolved in a solvent
2.5 The extreme degradation of productive land in arid and semi-arid areas
2.6 Particles transported in water
2.7 The space for air or liquid within a soil
2.8 This layer is called the “bedrock” or “parent rock”
2.9 This is the most commonly used soil for agriculture throughout the world.
2.1 The build-up of salt on the soil surface in arid or semi-arid regions, due to too much or too little irrigation water
Question 3 [10]
3.1 Name the factors that influence soil formation and briefly describe each of them
Question 4 [18]
Refer to FIGURE 1 showing causes of soil erosion and answer the questions that follow.
Figure 1: An image showing Soil erosion
3. 3
4.1 Identify TWO causes of soil erosion visible in the diagram. (4)
4.2 Briefly explain the process of soil erosion illustrated in the diagram. (4)
4.3 Discuss any THREE effects of soil erosion on the environment. (6)
4.4 Name and FOUR effects of erosion on people (4)
Question 5 [13]
Refer to FIGURE 2 showing a typical soil profile and answer the questions that follow.
Figure 2: An image showing a typical soil profile
4.1 What is a soil profile? (1)
4.2 What is a soil horizon? (1)
4.3 Of what importance is soil horizon A to humans? (2)
4.4 In which soil horizon does leaching mainly occur? (1)
4.5 What role does bedrock (R) play in soil formation? (2)
4.6 Explain the role of climate in soil formation. (4)
4.7 Why can one say that the soil profile illustrated in FIGURE 2 is that of mature soil? (2)
Total 55
![1
Grade 10 Life Sciences
Class Test 6
Surname Name
Date
Choose the substitute that best answers the question or completes the statement.
Only encircle the correct letter
Question 1 [4]
1.1. What is Soil?
a. The brown stuff on the ground.
b. Soil can be defined as the organic and inorganic material on the surface of the earth that provides the medium
of plant growth.
c. outermost shell of a terrestrial-type planet or natural satellite that is defined by its rigid mechanical properties
1.2.The soil is made up of for basic components, these are
a. Water, carbon dioxide, oxygen, salt
b. Lithosphere, mesosphere, hydrosphere, troposphere
c. Water, air, organic materials, minerals
d. Nitrogen, iron, sodium hydroxide, air
1.3 The soil type formed by the breakdown and weathering of rocks such as limestone, granite, quartz and shale
a. silt
b. sand](https://image.slidesharecdn.com/classtest-151026095410-lva1-app6891/85/class-test-1-320.jpg)
![2
c. clay
d. loam
1.4 What are the soil types that hold water but doesn’t have good aeration around the roots
a. Sand and Clay
b. Silt and Clay
c. Silt and Loam
d. Clay and Loam
Question 2 [10]
Give the correct biological terms for the following statements
2.1 The permanent destruction of forests in order to make the land available for other uses like housing and
urbanization, to harvest timber to create commercial items such as paper, furniture and homes, to create ingredients
that are highly prized consumer items, such as the oil from palm trees, to create room for cattle farming
2.2 Ability of water to flow through a substance
2.3 Ability of the soil to hold water (inversely related to porosity)
2.4 Molecules dissolved in a solvent
2.5 The extreme degradation of productive land in arid and semi-arid areas
2.6 Particles transported in water
2.7 The space for air or liquid within a soil
2.8 This layer is called the “bedrock” or “parent rock”
2.9 This is the most commonly used soil for agriculture throughout the world.
2.1 The build-up of salt on the soil surface in arid or semi-arid regions, due to too much or too little irrigation water
Question 3 [10]
3.1 Name the factors that influence soil formation and briefly describe each of them
Question 4 [18]
Refer to FIGURE 1 showing causes of soil erosion and answer the questions that follow.
Figure 1: An image showing Soil erosion](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)