An Olympian ski jumper uses friction to stop. This is an example of what type of
energy transformation.

Heat energy

Explanation:

When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this

answer; projective;