Jenny goes to the beach and uses sand to make a sand castle. which of the following is/are true about the change in the shape of the sand?

|. it is a physical change.
||. it makes a new substance.
|||. it is a chemical change.

a. | only
b. | and || only
c. || and ||| only
b. || only

How is an environment able to support different varieties of organisms?

What pattern of migration do whales follow?

Subduction zones form when an oceanic plate collides with another oceanic plate or continental plate. the continental crust is lighter and less dense than oceanic crust. continental crust's density is approximately 2.7 grams per cubic centimeter. oceanic crust is thinner and the average density is about 3.3 cubic centimeters. when the two crustal plates converge the oceanic plate always bends and subducts beneath a continental plate. once the oceanic crust subjects, the rocks are subjected to changes in heat and pressure. because of this, we would expect to find rocks in the area of a subduction. a) clastic b) igneous c) metamorphic d) sedimentary