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As Guest Email. Password reset sent successfully! Change password. As the sun hits our continent it is day time and as we continue to rotate it becomes night time. Now, we will show what happens during the year, as the Earth orbits the Sun once.
Ask students to walk in a circle around the "sun", always tilting their North Pole towards the Pole Star, while continually rotating their earth counterclockwise as viewed from above. Once they have walked completely around the sun and ended up back where they started, a year has passed. Now walk through another year while asking students to keep an eye on how much sun Vancouver on their Earth receives through the year.
Ask where in the circle does Vancouver get the most time in the sun? The northern hemisphere will be tilted towards the sun at this position in the circle. This is the position of midsummer - the summer solstice. Mark this place in the circle with "June" on the floor, or on the wall behind the circle. Ask where in the circle does Vancouver get the least sun exposure? The northern hemisphere will be tipped away from the sun at this position in the circle.
This is midwinter, or the winter solstice. Mark this position with "December". It should be exactly across the circle from June. Optional: Add that the vernal spring and autumnal equinoxes fall between, in March and September. Students can locate where their birthday month falls in the circle.
Now ask students to orbit the sun once more, with their tilted, rotating earths, and watch what happens to the north and south poles. Styrofoam ball measuring 6 inches. Modelling clay in the size of a lemon piece. Acrylic black and yellow paints. A white piece of 22 by 22 inches.
Poster Board. The very first step that you will have to take is inserting one of the bamboo skewers through the centre of the Styrofoam ball. You will have to do this very carefully. Now divide the modelling clay into two equal pieces and make a ball out of both the pieces. Next, try to make a stand using one of the clay ball pieces by pressing the piece against a table. It will be the same skewer that you inserted through the huge ball.
The same procedure should be continued with the other clay ball piece as well, but this time the skewer will be one inserted through the smaller ball. Now take the painting brush and colour the huge ball using yellow acrylic paint. It will serve as the model of the Sun. You can use the black marker for drawing a line around this ball. The line should be halfway between the bottom and the top side.
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