The correct responses that are heterogeneous mixtures are:
A. soil
C. concrete
E. open can of soda
- Soil: Contains various components such as minerals, organic matter, air, and water, making it heterogeneous.
- Concrete: Made of cement, water, sand, gravel, and other additives, resulting in a non-uniform mixture.
- Open can of soda: Has bubbles of carbon dioxide and varying concentrations of sugar and flavoring, so it is also heterogeneous.
Steel (B) is a homogeneous mixture (alloy) of iron and carbon, and Kool Aid (D), when fully mixed, is typically considered homogeneous because it dissolves completely in water.