LESSON 1 DEVELOPING A THEORY

Multiple Choice

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

• Harry Hess

• Galileo

• Alfred Wegener

• Newton

Multiple Choice

This German scientist first proposed continental drift theory

• Harry Hess

• Alfred Wegener

• Archimedes

• Thomas Warner

Multiple Choice

What two specific continents fit together most noticeably?

• Africa and North America

• South America and Europe

• South America and Africa

•  Antartica and Africa

Multiple Choice

What is this a picture of?

• plate tectonics

• continental drift

• pangaea

• glacier scaring

Multiple Choice

The theory of continental drift named a key part of this idea Pangaea. What is Pangaea?

• One of the ancient animals that helped Wegener prove that fossils from different continents originally came from the same location

•  supercontinent that existed in Earth's distant past

• The underwater ocean range in the middle of the ocean

• The hot spot which gave rise to the Hawaiian Islands, among others

Multiple Choice

The Theory of Continental Drift states that Pangaea broke apart and the continents "drifted" away from each other

• True

• False

Multiple Choice

Scientists think that the continents once formed a giant landmass that broke apart, and then slowly drifted apart. What is the name given to this hypothesis?

• sea-floor Spreading

• plate tectonics

• continental drift

• Pangaea

Multiple Choice

What geologic feature was evidence to support the theory that the continents used to be joined?

• Same rocks were found on different continents

• Glacial grooves were found on different continents

• Fossilized evidence of the same organism found on different continents

• Africa and South America look like puzzle pieces that fit together

LESSON 1 DEVELOPING A THEORY

Learning Outcome​

By the end of the lesson students will understand how scientists know what is under the sea​

Watch under the sea​

​

Multiple Choice

the shading in a bathymetry indicates the changes in slopes and depths of an undersea image

• true

• false

Multiple Choice

A digital image of undersea land surfaces and sea depth

• bathymetry

• sonar

• oceanography

Multiple Choice

Scientists use ______ to map the ocean floor

• radar

• pulsar

• lidar

• echo sounder

Multiple Choice

the deeper the ocean the longer THE SOUND wave travels back from the seafloor to the ship

• true

• false

Review - Match up

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Multiple Choice

A word to describe the deepest part of the ocean

• trenches

• abyssal plain

• ocean basin

• rift

Multiple Choice

Ocean floor topography refers to the different forms in which the ocean floor bottom can exist including underwater mountain, trenches etc.

• True

• False

Multiple Choice

Mid-Atlantic ridge runs through the centre of the Atlantic Ocean

• True

• False

Multiple Choice

What are Mid-Ocean Ridges?

• A chain of underwater waterfalls 

• A chain of underwater volcanos

• A chain of underwater mountains

• A chain of underwater rocks

Multiple Choice

Scientists were able to determine the age of the ocean floor by

• thematic map

• isochron map

• series map

Multiple Choice

An imaginary line on a map that shows points that have the same age is called a(n)

• isotope

• isometric

• isochron

• equator

Multiple Choice

The type of crust that is under the world's oceans.

• CONTINENTAL

• OCEANIC

Multiple Choice

Which process adds more crust to the ocean floor?

• suction

• sea-floor spreading

• subduction

• magnetic stripe

Multiple Choice

Sea-floor spreading occurs at mid-ocean ridges.

• True

• False

Multiple Choice

When the seafloor spreads, the rock below the seafloor becomes molten.

• True

• False

Multiple Choice

Where does sea-floor spreading occur?

• mantle

• mid-ocean ridges

• subduction zones

• deep-ocean trenches

Multiple Choice

Before lava reaches the surface, the molten material is called ____.

• rock

• magma

• volcanic ash

• liquid fire

Multiple Choice

Molten material that leaves a volcano's vent is called ___________.

• gas

• magma

• lava

• liquid fire

Draw

COMPLETE

Multiple Choice

Earth's surface is divided into pieces

• True

• False

Multiple Choice

A __________ plate is a large slab of crust and upper mantle that moves over the earth's surface.

• lithosphere

• Pangaea

• subduction zone

• tectonic

• Wegener

Multiple Choice

This is the layer that the earth's plates are made up of.

• lithosphere

• inner core

• mantle

• crust

Multiple Choice

What is FALSE about the age pattern on the seafloor in the Atlantic Ocean? 

• The pattern is symmetrical on each side of the Mid-Atlantic ridge (plate tectonic boundary)

• The oldest seafloor can be found towards the edges of the ocean, near the eastern and western continents

• The youngest sea floor can be found towards the edges of the ocean, near the eastern and western continents

• Seafloor near the Mid-Atlantic ridge (plate tectonic boundary) can be up to 10 million years old

Multiple Choice

True or False: Our continents will eventually become a supercontinent (like Pangaea) again, far in the future

• True
• False

Multiple Choice

In the Atlantic ocean, where is the youngest seafloor located?

• Towards the edges, near the eastern and western continents
• Towards the middle of the ocean
• Towards the north and south poles
• Young seafloor is located randomly throughout the ocean

Multiple Choice

Where would the oldest rock be found?

• L
• M
• N
• O

Multiple Choice

The process of ___________ continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.

• plate tectonics

• seafloor spreading

• continental drift

• convection

Multiple Choice

True or False: The plates will never stop moving

• True

• False

Multiple Choice

A vast, underwater mountain chain is called a(n) _________.

• ocean ridge

• oceanic crust

• deep-sea trench

• ocean floor sediment

Multiple Choice

At its oldest, ocean crust is about __________ years old

• 300-350 million

• 180-200 million

• 3.5 billion

• 10-20 million

Multiple Choice

In sea-floor spreading, molten material rises from the mantle and erupts

• in deep-ocean trenches

• along the edges of all the continents

• along mid-ocean ridges

• at the north and south plate

Multiple Choice

Seafloor spreading...

• creates new oceanic crust

• destroys or recycles crust

• creates new continental crust

• creates old crust

Plate Tectonics - Find the match

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Draw

F

Draw plate tectonics use page 30 to help you