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substance or a mixture. If the material is a pure substance, further classify it as either an element or a Directions: Classify each of the materials below. In the second column, state whether the material is a pure the same way if the material is an element, state in column 4 if it is a metal, nonmetal or a metalloid. Leave compound. Similarly, if the material is a mixture, further classify it as homogeneous or heterogeneous. In column 4 blank if the material is not an element. Name: Grade & Section: 1. Soil 2. Calcium carbonate (CaCO3) Material 3. Silicon 4. 14 Karat Gold 5. Carbon 6. Tap water 7. Table salt (NaCl) 8. Magnesium 9. concrete 10. Baking soda (NaHCO3) 11. Zinc 12. Blood Pure Substance or Mixture Element, Compound Homogeneous, Heterogeneous Metal, Nonmetal, Metalloid​