Convection Currents and Seafloor Spreading

What is label G

• Trench

• Mid ocean ridge

• abyssal plain

• sea mount

True or False : Sea-floor Spreading adds new material to the ocean floor?

• True

• False

What evidence helps scientists show how sea floor spreading occurs?

• Ocean Floor Material

• Magnetic Stripes

• Drilling Samples

• All of the Above

Sea-floor spreading begins at the

• Deep ocean trench

• Mid-ocean ridge

• Continent's edge

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

New crust is always formed at the...

• mid-ocean ridge

• deep-ocean trench

• asthenosphere

Tags

NGSS.MS-ESS2-1

What is label D

• Trench

• Mid ocean ridge

• abyssal plain

• sea mount

This scientist was the first to propose seafloor spreading

• William Watts

• Harry Hess

• Alfred Wegener

• Tenzing Norgay

Tags

NGSS.MS-ESS2-3

Why were magnetic patterns found on the ocean floor puzzling?

• They showed alternating bands of normal and reversed polarity.

• No rocks were magnetic.

• They did not show alternating bands of normal and reversed polarity.

• All rocks were magnetic.

Tags

NGSS.HS-ESS1-5

The OLDEST seafloor is located? 

• Closest to the mid-ocean ridge

• Farthest from the mid-ocean ridge

What is the primary force driving convection currents in the Earth's mantle?

• Gravity

• Heat from the Earth's core

• Solar radiation

• Tidal forces