An absorption line will appear in a spectrum if an absorbing material is placed between a source and the observer.
Answer:
The earth is made up of three different layers: the crust, the mantle and the core. This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly composed of basalt. The inner core is made from Iron and Nickel.
Explanation:
Combustion of fossil fuels release massive amounts of carbon dioxide
I am sure 100%
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Solar power because it is never ending and has no emmisions
