Gizmo Warm-up A chemical change, (or chemical reaction) occurs when one or more substances,
called reactants are n see, touch, or smell.
To begin, check that Reactant 1 is Sodium and Reactant 2 is Water. Sodium is a
metal so soft you can cut it with a knife.
1. Click Play ( ). What do you observe?

2. Do you think a chemical reaction has taken place? Explain.
A chemical reaction has

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic