Question

Answer the questions based on the information given.
The Amur plate, a small plate, has moved away from the Eurasian plate. It has moved125,000 meters in 25 million
years. It is moving eastward.
What is the rate of motion of the Amur plate? Express your answer in
year mm
Where would the plate be after 1 million years? Express your answer in m.
What geologic feature will form between the Amur and Eurasian plates?

Answer 1

What is the rate of motion of the Amur plate? Express your answer in .  

✔ 5 mm/year

Where would the plate be after 1 million years? Express your answer in m.  

✔ 5,000 meters east

What geologic feature will form between the Amur and Eurasian plates?  

✔ new ocean floor

Answer 2

The answers are:

• Rate of motion is 5 mm/year
• The plate would be 5,000 meters east
• An ocean floor would form between the Amur and Eurasian plates.

The rate of motion is in mm per year so you need to convert the distance it has moved to millimeters.

1 meter = 1,000 meters

125,000 will therefore be:

= 125,000 * 1,000

= 125,000,000 millimeters

Rate of motion = 125,000,000 / 25,000,000 years

= 5 mm/year

The plate is moving east and in 1 million years it would be:

= 1,000,000 * 5 mm/year

= 5,000,000 mm

In meters this is:

= 5,000,000 / 1,000

= 5,000 meters east

Because the Amur and the Eurasian plates are moving apart, the ocean would have to fill up the space left which would lead to the development of a new ocean floor.

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