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6 OUR SOLAR SYSTEM IS A VERY SMALL PART OF ONE OF BILLIONS OF GALAXIES IN THE UNIVERSE
- Theory
- TASKS
- 3.1 Time measurement (sundials, hourglass)
- 3.2 Phases of the Moon
- 3.3 A calendar
- 3.4 Orientation in the countryside
- 3.5 Models of planets and the Sun
- Task 1: Count the dimensions of the bodies and their distances in your model
- Task 2: Make a model of the solar system using foods of a round shape
- Task 3: Make a model of the solar system from the newspaper and starch.
- Task 4: Model of the Sun
- Task 5: Model of a comet
- Task 6: Create a comet nucleus model with a similar composition as a real comet
- Task 7: Make a comet nucleus model that you can enjoy eating
- 3.6 Orientation in the sky
- WORKSHEETS FOR PUPILS
Model of the Sun
In addition to the production of paper Sun on a scale with other planets, we can also model its surface. In the upper layer of the Sun (convective zone) the transfer of energy is carried out by flow. This layer acts as water warming up in the pot. Warm water rises upwards, transfers heat to the surroundings and cooled goes down (Fig. 2).
Pic 79: Flow Heat Transfer
The surface of the Sun is completely filled with so-called Bénard cells. In the middle of these cells, a hot fluid is upwelled from the heated bottom layer, the cooled material on the sides of the cells then drops down. This phenomenon is also called granulation of the solar surface. We easily simulate the granulation of the solar surface in a flat container using oil with added aluminium powder (Fig. 3).
Pic 80: Granulation of the solar surface