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| ionosphere | |||
| ionosphere A region of the earth's atmosphere, extending from about 60 to 1000 kilometers above the earth's surface, in which there is a high concentration of free electrons formed as a result of ionizing radiation entering the atmosphere from space | |||
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ionosphere : 27 צירופים, 5 נושאים |
| טכנולוגית מידע | 1 |
| מדעי החיים | 10 |
| מדעי הטבע | 3 |
| מכשירי חשמל | 11 |
| תקשורת | 2 |