* Heterogeneous mixture: A mixture where the components are not evenly distributed and can be easily separated.

* Solution: A homogeneous mixture where the components are evenly distributed and cannot be easily separated.

Why orange juice is a heterogeneous mixture:

* Pulp: Orange juice contains pulp, which is made up of small pieces of orange flesh. These pieces are visible and can be separated from the liquid.

* Separation: You can easily separate the pulp from the liquid by straining the juice.

In summary: Orange juice is a heterogeneous mixture because its components are not evenly distributed and can be easily separated.