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Chemical & Physical
| Question | Answer |
|---|---|
| What is Physical Property? | a characteristic of matter that can be observed and measured without changing the identity or chemical makeup of the substance. |
| Color | We can easily observe the color of a substance by looking at it. |
| Odor | Many substances have a noticeable odor. |
| Size | The size of a substance can be measured without altering the chemical makeup of the substance. |
| Hardness | Hardness is the measure of how difficult or easy it is to scratch a substance. |
| Luster | Luster describes how light is reflected off the surface of an object. (How shiny is the object?) |
| mass | Amount of matter in an object, it stays the same |
| weight | the effect that gravity has on the mass of an object |
| density | how tightly packed the atoms in an object are. |
| boiling point | The boiling point is the point at which a substance changes from a liquid to a gas. |
| melting point | The melting point is the point at which a substance changes from a solid to a liquid. |
| solubility | the measure in which an object dissolves into another object. |
| electrical conductivity | the measure of a material's ability to allow the transport of an electric charge. |
| chemical property | a trait or behavior of a substance that gives it the ability or inability to undergo a chemical change |
| combustibility and flammability | the ability a substance has to burn |
| combustion | a chemical reaction that produces heat and light |
| toxicity | the ability or strength of a substance to cause poisonous effects to living things. |
| physical change | 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. |
| chemical 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. |
| reactivity | how easily an atom has a chemical reaction with another element |
| 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 | Color, size, odor, mass, density, phase of matter, conductivity, luster, melting point, boiling point, ductile, malleable, magnetism, metal, nonmetal, metalloid |
| Examples of Physical Changes | Change of phase, cutting, |
| Examples of Chemical Properties | Reactivity, toxicity, radioactivity, flammability, and combustibilty |
| Examples of Chemical Changes | Example of Reactivity, Example of toxicity, example of oxidation |
Created by:
Maddie Gariepy
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