Cardiff International School Dhaka (CISD)
Lost Class Make Up Assignment C. T. - 4
Class: 4
Subject: Science
nd
Date: 22 (Sunday)-28th (Saturday) March 2015
Total Mark- 10
Instructions: All of your assignment must be done in A4 size paper. Mention your
Name, Class, Roll and Section clearly on the top sheet of your assignment.
Submission Deadline: Saturday 28thMarch 10.00 AM to the respective subject
teacher. The deadline is strict.
Name:
...................................................................................................................................................
Class: .......................Roll#...................Sec: ..................Teacher: Ms Dalia Rodrigues
Date: 23rdMarch, 2015, Monday
Lesson: Soil Erosion and Conservation, Page: 108 - 115
Task: Read the text book and find out the answer of the question.
Worksheet/Exercise:
1.
Match terms associated with soil conservation practices to the correct
definitions. Write the correct numbers in the blanks.
…….. a. Rotation of crops on a field from one crop to another 1.
Erosion
2.
Water outlet
……… b. Ditch which prevents erosion by diverting water around a field
rather than across
3.
Terracing
……… c. Removal of soil by tillage, wind and/or water
4.
Crop rotation
……… d. Structure designed to slow down running water
and control erosion on sloping land
……… e. Crop used to cover the soil surface to decrease
erosion
5.
Strip-cropping
6.
Diversion ditch
7.Cover crop
……… f. Practice of growing soil-conserving and soil-depleting
crops in alternate strips for the purpose of reducing erosion
………. g. Ditch which carries excess water from farm
2. List three types of erosion.
Answer:
………………………………………………………………………………………………………………..
………………………………………………………………………………………………………………………….
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Answer key:
Q. 1.
a. (4) Crop rotation
b. (6) Diversion ditch
c. (1) Erosion
d. (3) Terracing
e. (7) Cover crop
f. (5) Strip-cropping
g. (2) Water outlet
Q. 2. Water; Wind; Tillage
Date: 25th March, 2015, Wednesday
Lesson: Soil Erosion and Conservation, Page: 108 - 115
Task: Study the following text
Worksheet/Exercise: Complete the worksheet
Q.1. List five factors that influence soil erosion.
a ……………………………………………………………………………………………………….
b ……………………………………………………………………………………………………….
c………………………………………………………………………………………………………
d………………………………………………………………………………………………………
e………………………………………………………………………………………………………
Q.2. List five conservation practices that reduce wind erosion.
Answer: ……………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………..
………………………………………………………………………………………………………………………………………………….
Answer key:
1. Nature of the soil (texture, structure, organic matter, content); Climate; Vegetative cover; Slope and
horizontal length; Management of the soil.
2. Strip-cropping; Prevention of burning; Prevention of overgrazing; Moisture conservation; Emergency cover
crops; Emergency tillage operations; Windbreak tree planting; Shelter belt of trees
Date: 26th March, 2015, Thursday
Lesson: Soil Erosion and Conservation, Page: 108 - 115
Task: Watch the following you tube video and make five questions from the
presentation.
Worksheet/Exercise:
https://www.youtube.com/watch?v=QHyK2M8yiQE
Text Book/Reference Book: I Explore a Science Textbook 5
Help Lines:
For any assistance, please contact
1. Coordinator:
Ms NazmaAkter, Mob. No. +8804478882213
2. Lead Teachers:
Ms Farzana, Mob.No. 01916869056
3. Lead Teachers
Ms Rony, Mob.No. 01741227190
4. Science Teacher:
Ms Dalia Rodrigues Mob. No. 01727442114,
Mail address: rodrigues_dalia70@yahoo.com
5. Principal Head of School:
G.M.NizamUddin, +88-01622181818, gmnu302@yahoo.com