Question

instructions: choose the best answer for each question. show work w necessary. part a: classification of matter (multiple choice - 1 pt each) 1. which of the following is a homogenous mixture? a. salad b. salt water c. trail mix d. all of the above 2. which of the following is considered a pure substance? a. silver b. milk c. skittles d. soil

Explanation:

1. A homogeneous mixture has uniform composition throughout. Salad and trail - mix have visible different components, so they are heterogeneous. Salt water has salt uniformly dissolved in water, making it homogeneous.
2. A pure substance has a definite and constant composition. Silver is an element and a pure substance. Milk is a mixture of water, fats, proteins etc., skittles are a mixture of different candies, and soil is a mixture of various substances like minerals, organic matter etc.

Answer:

1. B. Salt water
2. A. Silver