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Science Chpt. 3 Exam
| Question | Answer |
|---|---|
| What is the formula for table salt | Sodium Chloride |
| What is an alloy | a solid solution of metals or nonmetals dissolved in metals |
| What are the symbols for carbon, hydrogen, and oxygen | C, H, O |
| Fill a balloon with this and it will rise rapidly in the air | Helium |
| Is sulfur a metal, a nonmetal, or a metalloid | A nonmetal |
| 3 ways to increase speed of dissolve | mix, heat, and crush |
| What are oxygen and hydrogen | gases |
| glowing would burst into flames when in contact with | oxygen |
| Is garden soil a compound, mixture, or an element | mixture |
| Is sulfur a compound, mixture, or an element | element |
| oxygen and hydrogen and xenon at room temperature | gas |
| road salt and sea salt and table salt | compounds |
| elements keep their original properties | mixture |
| solute | a substance that is dissolved in a solution |
| compound | a pure substance made up of atoms of two or more elements which are chemically combined |
| solvent | in a solution, the substance in which the solute dissolves |
| Flammability | a substance's ability to burn |
| What's the difference between a mixture and a compound | Mixtures: made up of elements, compounds, or both; no change in original properties of components; separated by physical means; formed using any ratio of components Compounds are the opposite and made of just elements |
| What's the difference between elements and compounds | Compounds (and mixtures) can be separated, has multiple types of particles, and can be broken down. Elements cannot be broken down , has one type of particle, and cannot be separated |
| What common gases are lighter than air | Hydrogen, helium, nitrogen, and methane |
| What common gases are heavier than air | Oxygen, fluorine, chlorine, and carbon dioxide |
| Is calcium carbonate an element, mixture, or compound | compound |
| Is air an element, mixture, or compound | mixture |
| Is potting soil an element, mixture, or compound | mixture |
| 2 teaspoons of blue food coloring is mixed into 1 cup of water. Which is the solute | The food coloring |
| How can paint be used to prevent rusting | Paint prevents H2O molecules from reaching the surface of the metal so it can't touch the oxygen |
| What causes iron to rust | contact with oxygen |
| What are the common ways to separate a mixture | Through distillation, a magnet, or by a centrifuge |
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