Classifying Matter Worksheet
Elements, Compounds & Mixtures Worksheet
Part 1: Read the following information on elements, compounds and mixtures. Fill in the blanks where necessary.
Elements (pure substances):
1. A pure substance containing only one kind of ____________.
2. An element is always uniform all the way through (homogeneous).
3. An element _____________ be separated into simpler materials (except during nuclear reactions).
4. Over 100 existing elements are listed and classified on the ____________________.
Compounds (pure substances):
5. A pure substance containing two or more kinds of _______________.
6. The atoms are _________________ combined in some way. Often times (but not always) they come together to form groups of atoms called molecules.
7. A compound is always homogeneous (uniform).
8. Compounds ___________________ be separated by physical means. Separating a compound requires a chemical reaction.
9. The properties of a compound are usually different than the properties of the elements it contains.
Mixtures:
10. Two or more ________________ or _________________ NOT chemically combined.
11. No reaction between substances.
12. Mixtures can be uniform (called ________________________) and are known as solutions.
13. Mixtures can also be non-uniform (called ________________________).
14. Mixtures can be separated into their components by chemical or physical means.
15. The properties of a mixture are similar to the properties of its components.
Chemistry: Classifying Matter
Classify each of the materials below. In the center column, state whether the material is a pure substance or a mixture. If the material is a pure substance, further classify it as either an element or compound in the right column. Similarly, if the material is a mixture, further classify it as homogeneous or heterogeneous in the right column. Write the entire word in each space to earn full credit.
|Material |Pure Substance |Element, Compound, |
| |or Mixture |Homogeneous, Heterogeneous |
|concrete | | |
|sugar + pure water | | |
|(C12H22O11 + H2O) | | |
|iron filings (Fe) | | |
|limestone (CaCO3) | | |
|orange juice (w/pulp) | | |
|Pacific Ocean | | |
|air inside a balloon | | |
|aluminum (Al) | | |
|magnesium (Mg) | | |
|acetylene (C2H2) | | |
|tap water in a glass | | |
|soil | | |
|pure water (H2O) | | |
|chromium (Cr) | | |
|Chex mix | | |
|salt + pure water | | |
|(NaCl + H2O) | | |
|benzene (C6H6) | | |
|muddy water | | |
|brass | | |
|(Cu mixed with Zn) | | |
|baking soda (NaHCO3) | | |
Name: ________________________
Hour: ____ Date: ___________
Chemistry: Classifying Matter
Classify each of the materials below. In the center column, state whether the material is a pure substance or a mixture. If the material is a pure substance, further classify it as either an element or compound in the right column. Similarly, if the material is a mixture, further classify it as homogeneous or heterogeneous in the right column. Write the entire word in each space to earn full credit.
|Material |Pure Substance |Element, Compound, |
| |or Mixture |Homogeneous, Heterogeneous |
|concrete |Mixture |Heterogeneous |
|sugar + pure water |Mixture |Compound |
|(C12H22O11 + H2O) | | |
|iron filings (Fe) |Pure Substance |Element |
|limestone (CaCO3) |Pure Substance |Element |
|orange juice (w/pulp) |Mixture |Heterogeneous |
|Pacific Ocean |Mixture |Heterogeneous |
|air inside a balloon |Mixture |Homogeneous |
|aluminum (Al) |Pure Substance |Element |
|magnesium (Mg) |Pure Substance |Element |
|acetylene (C2H2) |Pure Substance |Compound |
|tap water in a glass |Mixture |Homogeneous |
|soil |Mixture |Heterogeneous |
|pure water (H2O) |Pure Substance |Compound, |
|chromium (Cr) |Pure Substance |Element, |
|Chex mix |Mixture |Heterogeneous |
|salt + pure water |Mixture |Homogeneous |
|(NaCl + H2O) | | |
|benzene (C6H6) |Pure Substance |Compound |
|muddy water |Mixture |Heterogeneous |
|brass |Mixture |Homogeneous |
|(Cu mixed with Zn) | | |
|baking soda (NaHCO3) |Pure Substance |Compound |
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