Plate Motion

Lesson 3.3 - Plate Motion

Multiple Choice

Where are mid-ocean ridges found?

• divergent boundaries

• convergent boundaries

Multiple Choice

What do (divergent) mid-ocean ridges tell us about plate motion?

• They get further apart

• They get closer together

Multiple Choice

Why did you erase the hard, solid rock on the ocean floor that formed between the landmasses over the last 200 million years?

• The rock on the ocean floor between the landmasses had not yet formed.

• The ocean had not formed yet.

Open Ended

What was your strategy for putting the landmasses of Gondwanaland back together, as they were 200 million years ago?

Multiple Choice

Plates move very ____, over millions of years, they can move great distances.

• FAST

• SLOW

Open Ended

What evidence do we have to support our new key concept that it takes a long time for Earth’s plates to travel great distances?

How does this relate to past plate motion?

Multiple Choice

How do the plates move?

• By moving around on the soft solid rock

• They are pushed around by earthquakes

• Volcanic eruptions cause them to move around

• By moving around on hard solid rock

Multiple Choice

Which piece of evidence could we use to assume that two continents used to be connected?

• The presence of earthquakes on one of the continents

• Identically shaped bodies of water on both continents

• Similar climates for both continents

• identical landforms and similar rock formations on both continents

Multiple Choice

How can we observe the movements of the plates?

• By watching them because they move relatively quickly

• By using GPS sensors because the plates move too slowly for us to observe

• By monitoring the frequency of the earthquakes that are produced

• By watching one plate sink below another plate to get destroyed in the mantle

Multiple Choice

Based on what we know about plate motion today, how did the plates move in the past?

• They moved suddenly and rapidly to their current locations

• They moved slowly over time to the positions they are in now

• earthquakes caused the plates to move to their current locations

• none of the above

Multiple Choice

a diagram that shows what the inside of something looks like

• convergent

• plate boundary

• earthquake

• cross section

• mid-ocean ridge

Multiple Choice

something we observe to be similar over and over again

• pattern

• mantle

• eruption

• rifiting

Multiple Choice

A long, deep indentation in the ocean floor formed when two plates move together.

• Plate Boundary

• Mid-Ocean Ridge

• Trench

• Cross-Section

Multiple Choice

An underwater mountain range formed when two plates move apart.

• Plate Boundary

• Mid-Ocean Ridge

• Trench

• Cross-Section

Multiple Choice

Do the plates move quickly or slowly?

• Quickly

• Slowly

Multiple Choice

Which one of these can serve as evidence for plate boundary movement?

• Fossils

• Mountains

• Earthquakes

• All

Multiple Choice

What type of plate boundary is this?

• Divergent

• Convergent

• Transform

Multiple Choice

The Mid-Ocean ridge is an underwater mountain range formed from what type of plate boundary?

• Divergent

• Convergent

• Transform