A compound is a chemical combination of two or more elements in definite proportions. For example, two hydrogen molecules + one oxygen molecule= one water molecule. A solution is a physical combination of two or more chemicals mixed evenly (salt that is dissolved in water). Solutions are also known as homogenous mixtures. A mechanical mixture is a physical combination of two or more chemicals that are not evenly mixed (hot fudge on ice cream). Mechanical mixtures are also known as heterogenous mixtures.
Homogenous: milk, kool-aid, blood, lotion, window cleaner, glue, etc.
Heterogenous: pizza, cereal and milk, rocks in the sand at the beach, banana splits, etc.