Explain the difference between adsorption and absorption.

(N/A) In adsorption,the substance is concentrated only at the surface and does not penetrate through the surface to the bulk of the adsorbent,while in absorption,the substance is uniformly distributed throughout the bulk of the solid.
For example,when a chalk stick is dipped in ink,the surface retains the colour of the ink due to adsorption of coloured molecules,while the solvent of the ink goes deeper into the stick due to absorption. On breaking the chalk stick,it is found to be white from inside.
$A$ distinction can be made between absorption and adsorption by taking an example of water vapour.
Water vapours are absorbed by anhydrous calcium chloride $(CaCl_2)$ but adsorbed by silica gel.
In adsorption,the concentration of the adsorbate increases only at the surface of the adsorbent,while in absorption,the concentration is uniform throughout the bulk of the solid.