Lightning between a cloud and the surrounding air is called ______________
Fill in the blank(s) with correct word
air discharges
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Fission fragments tend to be radioactive because they have
A) more protons than neutrons. B) more neutrons than protons. C) too many more protons than neutrons. D) too many more neutrons than protons. E) the same number of neutrons as protons.
Scientists refer to Earth as a differentiated planet because ________.
A. the temperature in the core is higher than the temperature on the surface B. iron is more dense than silicate material C. the material in the interior of Earth is arranged by density D. Earth's structure is different from the other planets
Young open clusters contain a lot of hot, young blue-white stars
Indicate whether the statement is true or false
Copernicus was able to calculate the distances to the observed planets relative to Earth's distance from the Sun.
Answer the following statement true (T) or false (F)