Constructive and Destructive Forces

A glacier deposited large amounts of sediment after it had melted. Is this an example of a constructive or destructive force?

Is the example below describing a constructive or destructive process?

A river created a canyon over many years...

Is the example below describing a constructive or destructive process?

A delta is formed at the mouth of the river...

Is the example below describing a constructive or destructive process?

A sand dune is created at the beach.

Is the example below describing a constructive or destructive process?

Waves eroded away the sand of the beach. 

Is the example below describing a constructive or destructive process?

A volcano erupts and erodes the top of the mountain away...

Is the example below describing a constructive or destructive process?

A glacier creates U-shaped valley as it moves through the mountains...

What does deposition create at the mouth of a river?

Volcanoes can create new land when they release ______________

Which of these is CAUSED by chemical weathering?