Continental Drift and Seafloor Spreading Nearpod Homework

What was the name of the supercontinent that existed 175 million years ago?

• Gondwana

• Laurasia

• Pangaea

• Atlantis

Fill in the blank: The supercontinent Pangaea began to break apart approximately ____ million years ago.

• 175

• 500

• 1000

• 50

Fill in the blank: The concept of Continental Drift was later supported by the discovery of _______ by Harry Hess.

• Oceanic trenches

• Seafloor spreading

• Mountain ranges

• River deltas

Which is NOT a supporting evidence that Alfred Wegner came up with?

• Fossil Evidence

• Continents fit together like puzzle pieces

• Landforms and Rocks

• Sea floor spreading

Which two continents fit together like puzzle pieces?

• South America and Antarctica

• North America and Africa

• South America and Africa

• India and South America

Which two landforms looked similar? Select Two

• Rocky Mountains

• Appalachian Mountains

• Himalayas

• British Isles

Select the definition: Earth's crust is broken into sections called plates which are pushed by convection currents in Earth's mantle

• Continental Drift Theory

• Plate Tectonics Theory

• Alfred Wegner Law

• Sea Floor Spreading

Plates on the planets surface move because of ​ (a)   in the mantle. Hot material ​ (b)   and cool material ​ (c)  

• sea floor spreading
• ocean crust
• Continental Crust
• Convection Currents
• rises
• sinks

Match the following:

Groups:

(a) Alfred Wegener

,

(b) Pangaea

,

(c) 4 pieces of evidence

,

(d) continental drift theory

• the idea that Earth's continents moved apart from a single large continent

• Fossil evidence, puzzle pieces, landforms and rocks, glacial evidence

• came up with continental drift theory

• Supercontinent

​ (a)   is a thin dense, and younger crust. ​ (b)   is thick, old, and constantly being created and destroyed.

• Pizza Crust
• sea floor
• mountains
• Ocean crust
• Continental crust