Liquid water exists on the surface in the form of oceans, lakes and rivers on Earth. The frozen part of Earth's hydrosphere is made of glaciers, ice caps and icebergs. The frozen part of the hydrosphere is known as Cryosphere.
In a nutshell:
1) Cryosphere is the frozen part of hydrosphere.
2) Hydrosphere is made up of all bodies of water on the earth.
3) An interaction between Cryosphere and Hydrosphere would be ice caps melting into the ocean.
