# Physical Sciences Model Unit Plan for VIII Class

Physical Sciences Model Unit Plan for VIII Class

UNIT PLAN
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 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 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.

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.