Class : IX
Subject : Science
Topic : Unit 1 Measurement
Teaching Aids
chart, flashcards,
Vernier caliper,
screw gauge
Learning outcomes
1. Understand the fundamental and derived quantities and their units
2. know the characteristics of measuring instruments
3. use the Vernier caliper and screw gauge for small measurements
4. find the weight of an object using a spring balance
Introduction
make the students to understand that measurement is the basis of all important scientific study and its plays an important role in daily life also.
Explaining that it is defined as the determination of the size or magnitude of a quantity
Prior Knowledge
Make the students to recall the fundamental quantities and their units
Mind Map
Method of Teaching
1. quantities which cannot be expressed in terms of any other physical quantities are called fundamental quantity ex: length and mass
2. quantities which are expressed in terms of fundamental quantities are called derived quantity
3. A unit is the fundamental quantity with which unknown quantities are compared
4. To find the length or thickness of the smaller dimensions Vernier caliper and screw gauge are used
5. Astronomical units is the mean distance of the sun from the center of the Earth
6. Light year is the distance travelled by light in one year in vacuum
7. Least count of screw gauge is 0.01mm
8. Least count of Vernier caliper is 0.01mm
9. Mass is the quantity of matter contained in a body
10. weight is the normal force exerted by the surface on the body to balance against gravitational pull on the object
11. Accuracy in measurement comes to a true value
Reinforcement Activity
make the students to do the activities given in the book
1. measuring diameter using Vernier caliper
2. measuring thickness using screw gauge
Misconception
we always refer mass of an object with the word weight. The teacher explains the difference between mass and weight in the scientific terms
Evaluation
LOT
Fill in the banks
1. Meter is the unit of -----
2. A physical balance measures small differences in mass up to----
3. Rulers, measuring tap and meter scales are used to measure---------
4. 1 k.g of rice is weighed by ------
MOT
1. Match
Length - Kelvin
Mass - Meter
Time - Kilogram
Temperature - Second
2. Write the need of a standard unit
3. How will you find the thickness of a one rupee coin
HOT
1. can you find the diameter of a thin wire of length 2 m using the ruler from your instrument box
2. find the mass of an object weighing 98N
Remedial Teaching
make the students to understand fundamental quantities and units using flash cards and also unit prefixes using matching boards
Follow up
make the students to write answers for the questions given in the book and make a model of a common balance
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