National Science Olympiad (Soal OSN IPA SD) For Elementary School 2006 Theory 2

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.

Plants that live in desert regions typically show characteristic morphological structures, in order to adapt to the environmental conditions. Write some characteristic of plants that live in the area.

Photocell is a tool that can convert light into electric current. Lights mounted on street lighting generally equipped with a photocell. Explain the purpose of mounting the photocell and the advantages that can be obtained. If the light is installed under a very shady tree, then the photocell can not function properly. Explain why this happens. What will happen with the street lights and the loss of what we will experience.

Irfan house has a living room, family room, dining room, respectively a and 3 bedrooms. Each room features a 24-watt fluorescent bulbs and each room there is a 60 watt incandescent bulb. If all the lights are on, Irfan can use electric iron 500 watt and 600 watt rice cooker at home if 1200 watts of electricity available? Explain your answer.

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