LESSON 6 Q2

Question 1

device that bounces sound waves off underwater objects and then record the echoes off these sound waves

Answer 1

SONAR

Question 2

geologist and united states navy. considered one of the “founding fathers” of the unifying of plate tectonic

Answer 2

Harry Hammond Hess

Question 3

the magma moves up from the mantle and erupt as pillow lava

Answer 3

seafloor spreading

Question 4

rocks shaped like pillow show that molten materials have erupted again and again from crack along the mid ocean ridge and cooled quickly

Answer 4

evidence from molten materials

Question 5

rocket that make up the ocean floor lie in a pattern of magnetized stripes which hold a record of the reversal in magnetic field

Answer 5

evidence from magnetic strip

Question 6

core samples from the ocean floor show that older rocks are found farther from the ridge: youngest rock are in the mid ocean ridge

Answer 6

evidence from drilling samples