Why does the velocity of P-waves decrease at the mantle-outer Core boundary? a. The outer core solid iron
b. The outer core is liquid
c. The outer core is more dense
d. The outer core is a gas

Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? a. reflection across the line y = x b. rotation 180° clockwise about the origin followed by a reflection across the line y = -x c. reflection across the x-axis followed by a reflection across the y-axis d. reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin e. reflection across the y-axis followed by a rotation 90° clockwise about the origin

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies?

The process by which liquid water changes into water vapour is called what ?