Question

when classifying matter, it is helpful to organize your information in a useful way. one useful way to organize information is to use a dichotomous key. a dichotomous key is a key for identifying items based on a series of choices between alternative characteristics. a dichotomous key showing the terms used to classify matter is drawn below. directions: use the dichotomous key below to classify the following types of matter. 1. copper 2. sodium chloride 3. muddy water 4. hot coffee 5. milk

Explanation:

Step1: Classify copper

Copper is a pure substance made of one type of atom, so it is an element.

Step2: Classify sodium chloride

Sodium chloride ($\text{NaCl}$) is a pure substance made of two bonded elements, so it is a compound.

Step3: Classify muddy water

Muddy water has non-uniform, settling particles, so it is a heterogeneous suspension.

Step4: Classify hot coffee

Hot coffee has uniform, dissolved components, so it is a homogeneous solution.

Step5: Classify milk

Milk has small, non-settling dispersed particles, so it is a heterogeneous colloid.

Answer:

1. element
2. compound
3. suspension
4. solution
5. colloid