Ontario Grade 9 Science Class Practice Exam

What is a characteristic of a solution (homogeneous mixture)?

1. It has a uniform composition throughout

2. It separates into layers over time

3. Its components can be observed with the naked eye

4. It consists of only one substance

The correct answer is: It has a uniform composition throughout

A characteristic of a solution is that it has a uniform composition throughout, meaning the components are evenly distributed and cannot be easily separated. Option B is correct for a heterogeneous mixture, where some components may separate into layers over time. Option C is incorrect because the components of a solution are typically not visible to the naked eye. Option D is incorrect because a solution is a mixture of multiple substances.