Jim collects a sample of beach sand during a class trip. after a close inspection of the sample he classifies it as a mixture. a) heterogeneous b) heterologous c) homogeneous d) homologous

Answer is: A) heterogeneous.

This sample of sand is heterogeneous mixture.

Heterogeneous mixture is not uniform in composition (in this mixture different particles and minerals), but proportions of its components (in this mixture particles of different colors, small pebbles) vary throughout the sample .

convalent bond :

is a chemical bond formed by the sharing of electron between 2 atoms.

it is the direct chemical bond between 2 atoms.

in bond formation atoms are involved here.

electrovalent bond:

is a chemical bond defined as electroststic attraction between 2 atoms.

it is the electrostatic attraction between 2 atoms.

in bond formation, ions are involved here.

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10 years is the answer