Question

soil is a heterogeneous mixture. which of the following statements best explains why?
a the components are chemically bound together in a disordered shape, so it does not have the same composition throughout the mixture.
b it is unevenly mixed, so it does not have the exact same composition throughout the mixture.
c the particles are large enough to see, so it looks the same throughout.
d it is uniformly mixed, so it has an even composition throughout.

Explanation:

A heterogeneous mixture has an uneven composition. Soil has various components like minerals, organic matter, air, and water that are not uniformly distributed. Option a is incorrect as components in a mixture (heterogeneous or not) are not chemically bound. Option c is wrong because if it looked the same throughout, it would be homogeneous. Option d describes a homogeneous mixture. Option b correctly states that it is unevenly mixed, so composition is not the same throughout.

Answer:

B. It is unevenly mixed, so it does not have the exact same composition throughout the mixture.