Below is a matter of National Science Olympiad For elementary school (Soal OSN IPA SD) used in the National Science Olympiad (OSN). The quetions consist problem solving OSN theory 1 , theory 2, and science experiment OSN 2005. 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.
You are asked to guess the following riddle: Moving spasm when touched, breathe, breed, and have chlorophyll. Including whether such creatures?
The sound can not propagate in a vacuum. The space between the earth and the moon is almost entirely a vacuum unless the earth's atmosphere. When the astronauts landed on the moon, the astronauts can still carry on a conversation with people who are in the early Earth. Tell me how astronauts voices could be heard in the earth! Use the key words of the following: sound, air, electromagnetic waves, satellites, headphones, transmitter, receiver, microphone.
If you consider the content of the syrup in a bottle, drink water in plastic containers, or soft drinks in cans unopened, you notice it is not full. Explain to what the space above the liquid, and what will happen if fully charged?
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