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Chemical & Physical
| Question | Answer |
|---|---|
| What is a Physical Property? | A physical property is a characteristic of matter that can be observed and measured without changing the identity or chemical makeup of the substance. |
| What are some examples of Physical Property? | Some examples of physical properties are color, odor, size, hardness, luster, phase of matter, mass, density, boiling point, melting point, solubility, and conductivity. |
| We can easily observe the _______ of a substance by looking at it. | Color |
| Many substances have a noticeable _________. | Odor |
| The _________ of a substance can be measured without altering the chemical makeup of the substance. | Size |
| _________ is the measure of how difficult or easy it is to scratch a substance. | Hardness |
| Describes how light is reflected off the surface of an object. (How shiny is the object?) | Luster |
| Amount of Matter in an object.? | Mass |
| Is the effect of gravity on the mass of an object? | Weight |
| How tightly packed the atoms in an object are? | Density |
| The boiling point is... | ... the point at which a substance changes from a liquid to a gas. |
| The melting point is... | ...the point at which a substance changes from a solid to a liquid. |
| The measure in which an object dissolves into another object. | Solubility |
| The measure of a material’s ability to allow the transport of an electric charge. | Electric Conductivity |
| A trait or behavior of a substance that gives it the ability or inability to undergo a chemical change. | A Chemical Property |
| The ability a substance has to burn. | Both Combustibility and flammability |
| A chemical reaction that produces heat and light. | Combustion |
| The ability or strength of a substance to cause poisonous effects to living things. | Toxicity |
| A change that happens without changing the chemical composition of a substance. No new substance is formed. The change is usually (but not always) reversible. | A Physical Change |
| Occurs when a substance undergoes a change that creates a new substance with different chemical and physical properties than the original substance. The change is not reversible. | A Chemical Change |
| How easily an atom has a chemical reaction with another element. | Reactivity |
| What causes the odor when milk sours? | When milk begins to ferment (break down), it smells bad because of the bacteria that is being formed. Chemicals with a sour odor are released by this bacteria. |
| What causes the bubbles in a chemical reaction? | Some chemical reactions occur and cause a gas to form. The bubbles are the evidence of the gas fumes escaping. |
| What is a precipitate? | It is an insoluble (can’t dissolve) solid that is formed when two liquids combine. |
| Examples of Physical Properties? | Malleable, Metal, Nonmetal, Metalliod, Density, Mass, Phase, Ductile, Color, Specific Gravity, Magnetism, Ability to dissolve, Conductivity, Solubility, Luster, Hardness, Size, Boiling Point, Odor, Melting Point, and Luminescence. |
| Examples of Chemical Properties? | Toxicity, Reactivity, Radioactive, Flammability, Combustibility, and Oxidation. |
| Examples of Physical Changes? | Example of dissolving, Cutting, and changing phases. |
| Examples of Chemical Changes? | Formation of compound, example of reacting, example of oxidation, and example of toxicity. |