Below is a matter of National Science Olympiad For elementary school used in the National Science Olympiad (OSN). The quetions consist problem solving OSN theory 1 , theory 2, and science experiment OSN 2006. You can download it by clicking on the word download in addition to the title the following exam in the second paragraf. You can use this problem to train your students to become the champion in the competition of national science olympiad. Good luck.
Utilizing Energy Never Expires
The sunlight energy is not inexhaustible. Almost 12 hours a day of sunlight shining somewhere on Earth's surface. Especially in countries that are around the equator, the energy of sunlight received more because the sun emits light in a direction perpendicular to the surface of the soil. Furthermore, the power beam of sunlight throughout the year in countries around the equator is almost the same. In contrast to countries around the poles. Throughout the year the energy of sunlight received varies. Pasa during the summer, the energy of sunlight received a very large, while in winter, the energy of sunlight received very little.
Given the abundance of sunlight energy and it is very important to be able to harness the energy. Until now, the use of new and traditional done directly as for drying or heating. Maximum utilization can be done if we can transform sunlight energy into electrical energy. If we have electrical energy then we can change to all other forms of energy with ease.
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