Answer:
The Earth has different compositional and mechanical layers. Compositional layers are determined by their components, while mechanical layers are determined by their physical properties. The outermost solid layer of a rocky planet or natural satellite. ... The Earth has an outer core (liquid) and an inner core (solid).
Explanation:
Radio telescopes have to be much larger than optical telescopes because the wavelengths of radio waves are so much larger<span> than the wavelengths of visible light.
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Answer:
A
Explanation:
because food shortage is a basic need
Answer:
The outer core is mostly made out of iron.
Explanation:
