Activity 5 - Soil Analysis

Question 1

what is soil

Answer 1

• foundation which all terrestrial and freshwater life depend
• medium for plant growth
• reservoir for minerals

Question 2

lead to the development of distinct series of vertical layers or horizons

Answer 2

soil-forming processes

Question 3

distinct series of vertical layers or horizons

Answer 3

soil profile

Question 4

Soil horizons

Answer 4

• O
• A
• B
• C

Question 5

how are each horizon characterized

Answer 5

distinct color intensity

Question 6

O horizon

Answer 6

topmost layer deposited with organic matter

Question 7

A horizon

Answer 7

minerals and large amounts of organic matter

Question 8

B horizon

Answer 8

collected leached materials from A horizon

Question 9

C horizon

Answer 9

weathered parent rock material unconsolidated into the soil

Question 10

one of the important and permanent features of soil

Answer 10

texture

Question 11

soil texture

Answer 11

relative fraction of differently-sized particles in soil

Question 12

classifications of soil based in its texture

Answer 12

• clay
• silt
• sand
• gravel
• loam

Question 13

loam

Answer 13

mixture of sand, silt, and clay

Question 14

materials used in act 5 (substrate analysis)

Answer 14

• field notebook
• pencil/ballpen
• tape measure
• meter stick
• bolo/shovel
• camera
• 2 graduated cylinder

Question 15

what were observed in act 5 (substrate analysis)

Answer 15

• soil profile
• soil fraction

Question 16

dimension in soil profile

Answer 16

1.5 meter width
1.5 meter depth

Question 17

soil samples

Answer 17

• from standing water
• from running water

Question 18

amount of soil sample per graduated cylinder

Answer 18

125 mL

Question 19

duration of agitating sediment-water mixture

Answer 19

5-10 minutes

Question 20

duration of allowing sediments to settle

Answer 20

at least 24 hours

Question 21

formula for getting percentage of sediments

Answer 21

(no. of mL occupied by sediment / total mL of soil) (100)

Question 22

scientific principle applied in hydrometer technique

Answer 22

Archimedes’ Principle

Question 23

Archimedes’ Principle

Answer 23

a body that is immersed in fluid, whether partially or fully, is buoyed by a force equal to the weight of the fluid displaced by the immersed body

Question 24

When was act 5 - soil analysis performed

Answer 24

Oct. 19, 2023