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Reminder for submitting COS summer homework

Reminder for submitting COS summer homework

Dear learners,

Kindly note that the last day to submit your summer break homework is 10 June 2016 and after this date you homework will not be accepted and the consequence will be applicable as a part of homework policy.  This homework is submission of photographs in hard  copy to your respective new COS teachers.

Final term exam_COS_Syllabus & marks distribution

Final term exam_COS_Syllabus & marks distribution

Dear learners,

Please note that your practical exams for COS are scheduled as mentioned below:

22nd March 16- G7 Acuity 30th March 16- G7 Envisage
23rd March 16- G7 Idea and vision 31st March 16- G7 Insight

Practical exam will have any one of the following topics:

Separation of pigments using chromatography technique.

Finding the density of regular & irregular solid.

Finding the density of liquid.

Separation of substances using techniques like filtration.

Note: Electronic calculators will be provided for practical exam.

Theory exam:

The units which will be included for the theory exam are mentioned below:

Characteristics of living things The particle theory Force and motion
Cells Elements, compounds and mixtures Density and Pressure
Photosynthesis Metals and nonmetals Energy and energy transfer
Properties of matter and materials
Geography

Marks distribution:

Multiple choice questions: 20 marks

Subjective questions: 50 marks

Practical exam:10 marks

IA: 20 %

Note: For multiple choice questions, OMR sheet will be provided and for subjective paper, the answers are supposed to be written in the question paper itself.

 

Highlights of the unit_COS_Rates of reactions and Endothermic, exothermic reactions

Highlights of the unit_COS_Rates of reactions and Endothermic, exothermic reactions

Taking the prior knowledge of learners into consideration, which is,  about the idea that matter is composed of atoms and molecules that are attracted to each other and are in constant motion and also their understanding about the difference between physical and chemical change, the discussion was taken up as to what makes these bonds break and what are the factors contributing to the same. This was to make them understand that chemical reactions break the bonds and these reactions take part at different rates. These rates of the reactions are affected by the following: The effect of concentration of the reactants, the effect of particles size, the effect of temperature and the effect of using the catalysts. Also, the discussion was taken up that the mass of the reactants change after the chemical reaction and also the volume of the product changes.

This was followed by the concept that if the reaction is talking place then either it will take the heat in during the course of the reaction or else the heat will be given out and this is how the terms endothermic and exothermic reactions were introduced to the learners. This was followed by discussing examples of endothermic and exothermic reactions by testing one example of each by making two reactants react and checking the heat evolved/absorbed by touching the surface of the beakers. Later learners were taught how to measure the energy in a fuel wherein they measured the energy in the fuel- spirit practically and got a clear understanding of the concept.

Highlights of the unit_Pressure__COS

Highlights of the unit_Pressure__COS

Learners enjoyed learning about the the concept of pressure by keeping the objects in different positions and understanding that as the surface area changes, the pressure acting on the surface changes for solids, pressure in liquids and their applications were discussed later. They were then introduced to the  formula to calculate pressure followed by solving sums related to the same. Learners were able to give examples of pressure from everyday experience and this discussion was continued and they were taught about ear popping and the reason that this happens due to pressure difference inside and outside the body when we travel from higher to lower pressure or vice-versa. This was followed by knowing how to increase and decrease the pressure based on the requirement and application. They also got to understand what are aerosols and how are they related to pressure applications. They also gained knowledge about hovercraft and it’s working.

G7_COS_Highlights of the unit_Density

G7_COS_Highlights of the unit_Density

Learners got to understand that mass occupied in a certain volume is termed as ‘Density’ and also learned about units of density. They understood why is it important to know the densities of different substances. They performed experiments to find densities of – irregularly shaped solid, regular solid and liquid (water). This gave them a clear picture about the concept of ‘Density’. Later, they made Density tower to determine the difference in densities of different liquids which helped to them to get a clear picture about the concept of ‘floating and sinking’. After understanding the concept of density,  they solved numerical based on density and made charts for displays.  Learning the concept this way provided them the scope to make real life connections with the concept and made the learning enjoyable.

G7_COS_Diwali vacation h.w.

G7_COS_Diwali vacation h.w.

Dear learners,

Your Diwali vacation h.w. for COS is to click and upload at least one image of the real life application for each topic of COS which is done so far. The images are to be uploaded in the folder named- your section name- Diwali h.w. which will be shared with you by your respective COS teachers. And name the image as (your name_topic) before uploading.

Enjoy your vacation and keep smiling 🙂

Highlights_COS_Cells

Highlights_COS_Cells

Learners enjoyed learning about cells wherein they got to know about:

How cells were discovered and basic parts of plant and animal cells. They also learned about adaptation in plant and animal cells.

Later they explored the microscope and understood about various parts of microscope and their functions. They even learned to calculate the magnification power of the microscope.

G8_Important note_COS

G8_Important note_COS

Dear students and parents,

Please note that we tried keeping the test for topic ‘Acids and Alkali’ earlier but there were other tests during those dates and most importantly, we do keep a gap of 6-7 days between two unit tests and there is  already  one test before the above mentioned one. Moreover, revision will be going on during the end of this month so appearing for a test will serve as a good method of revision, for the students. 

Unit test- COS

Unit test- COS

Dear learners,
This is to inform you that your fifth unit test of COS is scheduled on 1st October’15 which is D1. The topic for the test is ‘Cells’ and it will include multiple choice questions for 10 marks and subjective questions for 20 marks. The duration of the test will be 45 minutes and total marks will be 30.
Prepare well for your test.
Regards,
Science team.
Grade 9_COS First Term Syllabus_All Sections

Grade 9_COS First Term Syllabus_All Sections

Dear learners,

Please note the following details regarding the COS (Co-ordinated Science) syllabus for the term 1 exam

Please refer to the syllabus for further details.

Physics syllabus: P1 Motion, P2 matter and forces, moment of force, P3 work energy and power.

Chemistry syllabus- C1. The particulate nature of matter C2. Experimental techniquesC3. Atoms, elements and compoundsC6. Energy changes in chemical reactionsC9. The Periodic Table C8. Acids, bases and salts

Biology syllabus: B1 Characteristics of living things, B2 Cells (Cell structure and Movement in and out of cells), B3 Enzymes, B4 Nutrition (Chemicals of life)

The paper style, distribution of marks and other instructions are provided below:

No. of papers Type of paper Duration of the paper Additional material required(if any) Maximum Marks Instructions
2 Paper 1 :MCQ 25 minutes OMR sheet 20 Calculator is allowed.
Paper 2: Subjective and alternative to practical 2h 80 Students need to write in the question paper itself. Calculators can be used.

Also note that there will 10 marks question on experimental skills from each Biology , Chemistry  and Physics paper.

Good luck for your exams!

Regards,

Science team