Physical Sciences Model Unit Plan for VIII Class

Physical Sciences Model Unit Plan for VIII Class

Teacher’s Name : ………………………………………………………..
Subject : PHYSICAL SCIENCES,                     Class : VIII
No. of periods required : 12;                               Unit: Force

Competencies to be achieved after teaching the lesson:

Conceptual understanding :

  • The pupil differentiates the work done by push and pull.
  • The pupil divides the forces into contact and non contact forces.
  • The pupil explains about frictional force.
  • The pupil give examples to tension force.
  • The pupil explaining about the magnetic and electric forces and fields.
  • The pupil understands the production of static electricity by friction.
  • The pupil understands different cases of resultant force.
  • The pupil derive the units and formulae for force.
  • The pupil explains resultant force based on FBD { Free Body  Diagram}.
  • The pupil understands the pressure and its variation w.r.t surface area.

Asking questions and making hypothesis :

  • The pupil observes the changes in the muscles during work.
  • The pupil asks the relation between force and friction.
  • The pupil imagines the situation during the absence of friction.
  • The pupil imagines the relation between gravitational force and tension in case of hanging bodies.
  • The pupil asks the information about the static electricity.
  • The pupil asks questions related to like poles and unlike poles.

Experiments and Field investigation:

  • The pupil finds the limiting force that can be bared by string by doing experiment.
  • The pupil proves the statement “like poles repel, unlike poles attract”.
  • The pupil explains the effect of resultant forces by doing experiment.
  • The pupil proves the electro static force of attraction using inflated balloon and paper pieces.
  • The pupil proves the change in effect of force with area of contact.

Collecting information and project work:

  • The pupil collects information about the different works done by push or pull or both.
  • The pupil do the project about the advantages and disadvantages of friction.
  • The pupil collects pictures related to contact forces and force at a distance.
  • The pupil collects different paper cutting and draws FBD {Free Body Diagram}.
  • The pupil collects the information about pressure in fluids.

Drawing and Model making :

  • The pupil draws the FBD for the bodies resting on the surfaces.
  • The pupil draws the FBD for the hanging bodies.
  • The pupil draws the FBD for large number of force acting on bodies in different cases.

Appreciation and Aesthetic values:

  • The pupil appreciates the advantages of friction to humans.
  • The pupil appreciates the result produced due to gravitational force.
  • The pupil appreciates the contribution of great scientists like Newton for their work in the field of force.
Period number Content/Activity/
Competency to be achieved in 45 minutes
Teaching strategy Required T L M
1Introduction about basic topics about force Activity: 1Asking questions, Discussion, mind mapText book
2Contact and non – contact forces Activity: 2,3,4Discussion and ActivityWeights, Ball
3Friction, Normal force Activity: 5Discussion and group ActivityPad, Ball, Different surfaces, eraser, coin.
4TensionExperiment, Observation, DemonstrationSpring balance, weights,Light threads, wt hanger
5Forces at a distance(magnetic,electric, gravitational forces) Actvity: 6,7,8Experiment, group activity, DiscussionWhite and red foam balls, needles, bar magnet, vessel, water, balloon, paper pieces.
6Resultant force (net force) Activity: 9Activity, Discussion, FBD , observationBench, Chart
7Calculation of net force in different cases Activity: 10,11,12Activity, Discussion, FBD , observationRubber, Ball, Marbles in place of caroms.
8Other effects of force, PressureActivity, Discussion, ObservationPencil, brick, trays, sand.
9Improve your learning. (Making students to write answers through discussion)DiscussionNote book, Text book
10Improve your learningDiscussionNote book, Text book
11Improve your learningDiscussionNote book, Text book
12Demonstration class by interested pupil in the class room.DiscussionText book
Physical Sciences Model Unit Plan for VIII Class

Teaching notes:

  • Every object in the universe attracts every other object in the universe, according to universal law of gravitation.
  • These attracted objects do not move, because of small masses.
  • Vertically thrown objects losses velocity as it moves and finally falls down due to gravitational force.
  • Like charges repel each other and unlike charges attract each other.
  • A charged body attracts an oppositely charged body and a neutral body due to induction.
  • S.I unit of force is Newton and C.G.S. unit of force is dyne.
  • They are related as 1 Newton =”10 to the power of 5″ dyne.
  • Representation of all forces acting on a body at a time in a diagram is called Free Body Diagram
  • Like poles repel each other and unlike poles attract each other.
  • Magnetic and electric forces are both attractive and repulsive, but gravitational forces are always attractive.

Reference Books:
APSCERT physical sciences book.
Concepts of physics –H.C. verma
Goyal’s IIT Foundation course Physics.

 Download the Unit Plan 

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