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(IF you mean constructive and destructive plates boudaries...)
Constructive- Plates moving apart.
Sometimes the earths plates move apart from one another. This is because of the convection currents that force them to move in opposite directions
Magma (from mantle, the thing underneath the earths crust) can escape. This can cause volcanoes. This magma cools and constructs new land like islands we can live on.
Destructive-PLates moving together.
When plates move together they sometimes don't agree.
This happens when an oceanic plate meets a continental plate. The oceanic plate is lighter than the continental plate so has to go under the continental plate. As it goes under it gets destroyed because it is so hot! and because constructive is a volcano making land and destructive destroying the land

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Wiki User

14y ago
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Wiki User

13y ago

Constructive forces build up landforms, and destructive forces break them down.

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Wiki User

15y ago

Constructive- Creates or constructs Destructive-Destroys or Demolishes

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Wiki User

14y ago

because the magma in the volcanoes reproduces the from of the tranquility ...

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Wiki User

12y ago

a constructive force is a force that builds up the earth.a destructive force is a force that destroys the earth

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Anonymous

Lvl 1
3y ago

one of it can mess up and the other on can make it better

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Q: How are constructive and destructive forces alike?
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