You are standing at a railroad crossing. a train comes and blows its horn. it leaves its horn on through the entire crossing. what happens to the sound waves you hear from the horn once the train passes and is moving away from you?

a) nothing

b) the wavelength decreases / higher pitch

c) the wavelength increases / lower pitch

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle

The dashed segment of the plotted experiment in the graph in the lesson is called an

Which nation is home to the bass rock in the firth of forth?