Fresh features from the #1 AI-enhanced learning platform.Try it free
Fresh features from the #1 AI-enhanced learning platformCrush your year with the magic of personalized studying.Try it free

Dynamic Earth: Charac. of the Seafloor

5.0 (4 reviews)
Get a hint
Complete the sentence describing the important ideas in Hess's theory:

Hess expanded on Wegener's theory of ______.
Pangaea landmass
continental drift
conveyor belt
Click the card to flip 👆
1 / 38
1 / 38
Terms in this set (38)
Complete the sentence describing the important ideas in Hess's theory:

Hess expanded on Wegener's theory of ______.
Pangaea landmass
continental drift
conveyor belt
continental drift
Complete the sentence describing the important ideas in Hess's theory:

Hess proposed the idea that ____ are places where the crust is created.
mid-ocean ridges
continents
deep-ocean trenches
mid-ocean ridges
According to Hess's theory, what might happen if the magma under a mid-ocean ridge cools?

The magnetic stripes might reverse direction.
The deep-ocean trench might become deeper.
The crust at the ridge might form more quickly.
The plates on either side of the ridge might stop moving.
The plates on either side of the ridge might stop moving.
What evidence supports Hess's theory of seafloor spreading? (3)

fossils of the same animals found in different areas
the direction iron in ocean rocks points
the tilt and rotation of the Earth's axis
the age of different rocks on Earth's surface
pillow-shaped rocks found in the sea
the direction iron in ocean rocks points
the age of different rocks on Earth's surface
pillow-shaped rocks found in the sea
How does Earth's magnetic field provide evidence for seafloor spreading?

- It creates a pattern of alternating rock stripes on both sides of a mid-ocean ridge.
- It allows scientists to determine the age of drilling samples.
- It causes magma to harden quickly underwater.
- It shows that younger rocks are located deeper underwater than older rocks.
It creates a pattern of alternating rock stripes on both sides of a mid-ocean ridge.