Primary cosmic rays generally appear to be fully ionized nuclei of very massive atoms.
Secondary cosmic rays are showers of various subatomic particles (e.g. muons) produced in collisions of primary cosmic rays with atomic nuclei of various gasses in earth's upper atmosphere.
composed of rock, ice, and cosmic dust
Cellular cytoplasm is primarily composed of lipids.
The is no known planet composed primarily of Iron Oxide.
Gas (primarily hydrogen)
There are three components.They are micro filaments,micro tubules and intermediate filaments.All are composed of proteins.
The two rocks that are primarily composed of a mineral that bubbles with acid are limestone and marble.
fats and proteins
actin and myosin
basalt
sphagnum
basalt
The lithosphere is composed of the oceanic and continental crust, along with the brittle uppermost mantle. The continental crust is mainly granitic, and the oceanic crust is primarily basalt.