Question

List three types of evidence for sea-floor spreading.

1._______________

2._______________

3._______________

Answer 1

1. rocks near mid-ocean ridge were younger than rock near trenches
2. matching bands of magnetic rocks were found on either side the mid-ocean ridge; bands like tree rings - record changes in earth's magnetic field over time
3.earthquake data showed oceanic crust is sinking on to the mantle at trenches

Answer 2

This is from a quizlet: 

1. rocks near mid-ocean ridge were younger than rock near trenches

2. matching bands of magnetic rocks were found on either side the mid-ocean ridge; bands like tree rings - record changes in earth's magnetic field over time

3. earthquake data showed oceanic crust is sinking on to the mantle at trenches