This time around students from grades 7 & 8 were taught on the Density and it’s real-world applications in order for them to understand the concept in depth and even apply it to some extent.
The session started by demonstrating how gravitational force acted on an object is
irrespective of its mass/weight or material of the object.
- A rubber ball, plastic ball and paper ball when released from same height, touch the ground at the same time.
- Why a paper ball and paper when released from same height reaches ground
not at the same time.
Further, difference between mass and weight was explained to them by giving few example like difference in gravity on earth and on moon and hence on an object/person would not weigh same on earth and moon.But mass of an object/person would remain same and that’s why for many science experiments/concepts we consider mass instead of weight of an object.
Later, volume concept was explained.How we can measure volume of irregular objects by measuring difference in water level etc. was explained. And later following experiment was demonstrated to explain relation between mass,volume and density.
The relationship between Volume & Density was explained by showing the following video:
Experiments conducted to Demonstrate Density:-
Objects like plastic balls, chikoo & mustard seeds were used to see if they would float or sink in water and the results of which were later explained to the students.
The Density Towers concept was explained using this video.:-
This Methodology of using real-life applications of Science concepts worked as an advantage since these activities stayed with the students for a longer time and served a perfect food for the inquisitive mind.