A Penny is an element because it is made out of copper and copper is an element on the periodic table.
Table Salt is a compound because it is made up of NaCl.
Water is a compound because it is made up of H2O.
Color dye in water is a mixture because you are putting two different atoms together and they are getting combined and mixed in one.
Iced tea is mixture because you are combined again two different atoms together. Iced tea powder is pored into the glass of water and is dissolving.
Mixed Nuts is a mixture because two or more substances are combined together in this case almonds, pistachios and walnuts.
Milk is a homogenous mixture because when looking at it, it is the same top till bottom and doesn’t have a difference.
Jell-o is a homogenous mixture because it is the same substance throughout the whole thing.
Italian dressing is a heterogeneous mixture because two or more compounds are combined together. Also, because it isn’t the same uniform throughout the whole thing.
Water and Oil together is a heterogeneous mixture because two different substances are combined and as you can see in the picture the oil all remains at the top of the glass and doesn’t mix together with the water. For it not mixing together and having it not the same uniform throughout the glass means it is a heterogeneous mixture.