General Physics Question:

In chemistry, heterogeneous mixture is a mixture of two or
more different substances in the form of solution or
colloids. For example, salad is an heterogeneous mixture

A heterogeneous mixture is a mixture that can be separated.

Here are some examples of heterogeneous mixtures
Sandy water
cake mix and cookie dough
sugar and salt mixed in a bowl
carbonated beverage or beer (the CO2 gas is mixed with the
liquid)
orange juice with pulp in it
water with ice cubes in it
chicken noodle soup