Look at the spectrum of star 1 which is moving towards earth and the spectrum of star 2 which is moving away from earth. the band in the middle represents the spectrum of a motionless light source. which of these is a correct inference that can be drawn from the observation of the three spectrums? a.) the spectrum shifts towards the red region when the star moves towards earth. b.) the spectrum shifts towards the blue region when the star moves towards earth. c.) the spectrum is identical for moving stars and motionless stars. d.) the spectrum is identical for stars moving away from earth and stars moving towards earth.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.

1) a

2)c

3)a

4)c

5)b

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