Under the Galata bridge you find a handful of colourful boats that sell amazing fish sandwiches â balik ekmek. Basically, fresh mackerel is grilled on these boats, then stuffed with a bit of onion and salad into a roll and drizzled with lemon juice. Such a simple pleasure, yet amazing.
Ice cream is a colloid combining an emulsion and a foam, with milk fat, ice crystals and air (a liquid, a solid and a gas) spread throughout another liquid (the water from the milk). In traditional homemade ice cream, the lecithin in egg yolks acts as the emulsifier, keeping the colloid stable.
A glass of iced tea is a heterogeneous mixture. The ice cubes have different composition and properties than the tea. You can say that the ice cubes are a solid phase, and the tea is a liquid phase. Blood is a heterogeneous mixture because the blood cells are physically separate from the blood plasma. The cells have different properties than the plasma. The cells can be separated from the plasma by centrifuging, which is a physical change.