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Answer:
some objects are too far or big to be fully observed from earth so the devices have to be launched, some devices are made to collect samples or bring astronauts into space.
Explanation:
Active sensors, provide their own source of energy to illuminate the objects they observe like ones on earth , An active sensor emits radiation in the direction of the target to be investigated. The sensor then detects and measures the radiation that is reflected or backscattered from the target.
Passive sensors, on the other hand, detect natural energy (radiation) that is emitted or reflected by the object or scene being observed. Reflected sunlight is the most common source of radiation measured by passive sensors. therefore some
Answer:
The free market is an economic system based on supply and demand with little or no government control. It is a summary description of all voluntary exchanges that take place in a given economic environment.
Ocean wind circulation mainly mechanism climate change Earth
Answer: Sea-floor spreading — In the early 1960s, Princeton geologist Harry Hess proposed the hypothesis of sea-floor spreading, in which basaltic magma from the mantle rises to create new ocean floor at mid-ocean ridges. ... A test of the hypothesis of sea-floor spreading was provided by studies of the Earth's magnetism.
