Answer:
Option A
Explanation:
The question is incomplete. The complete question is as follows
<u>Which statement describes a mixture of sand and water at room temperature?
</u>
<u>A) It is heterogeneous, and its components are in different phases.
</u>
<u>B) It is homogeneous, and its components are in different phases.
</u>
<u>C) It is homogeneous, and its components are in the same phase.
</u>
<u>D) It is heterogeneous, and its components are in the same phase.
</u>
<u>Answer
</u>
Let’s define phase, heterogenous and homogenous.
- Phases are different states of matter. There are 4 different phases; solid, liquid, gas and plasma.
- Homogenous mixtures are mixtures whose components are thoroughly and evenly mixed. Example include a mixture of salt and water.
- Heterogenous mixtures are mixtures that are not thoroughly mixed. Example include a mixture of sand and sugar.
A mixture of sand and water has both solid and liquid substances. This means that its components are in <em>different phases.</em> This rule out option C and D.
The mixture of water and sand is <em>heterogenous</em><em>.</em> It’s not evenly mixed. If we take three samples from the mixture, all of them will have different proportion of gravel, water and sand partials.
Therefore, option A is the correct answer.
