Question: Composition of the mixture is the same throughout. Difficult to separated substances.

ex) milk, soft drink, blood

Answer: homogeneous mixture

Question: Composition is not uniform throughout. Can separate substances relatively easily.

ex) iron shavings in sand.

Answer: heterogeneous mixture

Question: raw milk

Answer: heterogeneous mixture

Question: tap water

Answer: homogeneous mixture

Question: concrete

Answer: heterogeneous mixture