7th grade Q3 5th quiz

Who is the person credited with developing the theory of continental drift?

• Harry Hess
• Galileo
• Alfred Wegener
• Newton

What does the theory of continental drift state?

• The continents were once joined in a super-continent and have moved over time
• Continents are stationary and do not move
• The Earth is broken into lithospheric plates that move due to convection currents
• none of the above

What is this a picture of?

• plate tectonics
• continental drift
• pangea
• glacier scaring

According to the continental drift hypothesis, the presence of similar fossils in South America and Africa supports which scientific idea?

• Animals easily and frequently travel from Africa to South America.

• Species of animals probably traveled between continents on natural rafts (such as trees destroyed in tsunamis).

• Land bridges once existed that connected the continents.

• South America and Africa were once connected together.

Which process adds more crust to the ocean floor?

• suction

• sea-floor spreading

• subduction

• magnetic stripe

Massive pieces of land that are part of the Earth's crust and upper mantle

• Tectonic plates
• Trenches
• Divergent boundary
• Continental shelves

The OLDEST seafloor is located? 

• Closest to the mid-ocean ridge
• Farthest from the mid-ocean ridge

What are underwater mountain ranges called?

• boundaries
• mid-ocean ridges
• rift valleys

type of boundary in which plates slip past each other

• divergent

• convergent

• transform

• minimal

The formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side is called

• Subduction

• Seafloor Spreading

• Divergent boundary

• Convergent boundary