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Posts Tagged ‘physics’

Many practical classroom activities could be carried out, when teaching the concepts of conduction, convection, and radiation. These are simple yet relevant, and would allow students to understand the topic easily. The concept has to be taught in the first 15 minutes of the 1-hour class and then proceed to show some of these demos.

The teacher prepares the materials needed and see to it that safety precautions are observed.

CONDUCTION ACTIVITY

  1. Prepare three different rods such copper, glass, and iron (or whatever is readily available, except of course plastic rods).
  2. Place them on a tripod and fix a small nail near one end of each rod using candle wax or Vaseline as ‘glue’. (Make sure the rods are not touching each other).
  3. Using a bunsen burner, heat the other ends of the rods evenly.
  4. Record the time it takes for each nail to drop off from the respective rods? (more…)

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Physics is so dear to me, although many students and science teachers alike do not feel good with it. To some, it is boring and full of Maths. Others just do not find it attractive to their intellect, I should say.  But to me, it is full of wonders and an endless chain of discoveries. One of my favourite topics in this field is Space and the Universe.  It appeals to me differently because I feel like watching a movie and doing some reflection at the same time.

Just like the stars that we glimpse in the sky on quite nights, they are full of excitement. They are part of the history that unfolds before our senses, because the stars that you see were actually there many years ago. Stars are light years away from the Earth, and so it would take years for its emitted light to reach us. A light year is a distance that light can travel in one year.  If a ray of light travels in a vacuum in approximately 3×108 m/s, the ray of the sun which distance from the Earth is approximately 150 million kilometres could reach the Earth in eight minutes, how much more for distant stars? (more…)

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Many students would still find it confusing to understand the phenomenon of high tide and low tide.  What causes it and why?

 

Simple reason is to associate it to gravity of the Earth and the Moon, and the pull of force is called gravitational force. Gravitational force exists between two objects with mass.  (more…)

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