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Chemistry terms P. 5
Chemistry Terms for Mrs. Goldschmidt's class
| Term | Definition |
|---|---|
| Chemistry | study of matter and the changes it undergoes |
| matter | anything that has mass and occupies space |
| energy | the ability to do work |
| mass | a measure of the quantity of matter & does not change with position |
| weight | a measure of the force of attraction of one object to another & can change with position |
| steam/water vapor | water in the gaseous state |
| viscosity | resistance of liquid flow |
| miscible | liquids that are soluble in all proportions |
| immiscible | not soluble in all proportions and when shaken together, will form a cloudy mixture or separate |
| diffusion | describes the mixing of gases. |
| pure substances | single chemical composed of the same type of matter, particles and can be both elements and compounds |
| elements | made of a single type of atom |
| atom | smallest particles that retains the properties of the elements & can not be broken down into smaller atoms |
| what is scientific data? | |
| what are the 3 component parts of a measured value? | |
| Name a System of measurement. | Length/Mass/Temperature/Time/Amount of Substance |
| What is the metric system or SI? Why is it important? | |
| metre/meter is equal to? | |
| kilograms is equal to? | |
| go find the numerical quantity, unit & name of a substance | |
| how was the meter defined? And later redefined? | |
| Intensive Properties | based on things internally (inside); doesn't change properties; doesn't depend on how much matter Example: boiling point, state of matter, density |
| Extensive Properties | based on things outside; changes properties; depends on the amount of matter Example: volume, mass, size |
| Homogeneous | same composition throughout; mixed permanently (unless separated) Example: sugar dissolving in water |
| Heterogeneous | varied composition based on position; most dense solution stacks from the bottom upward Example: salad dressing, oil in water |
| Chemical Properties | can only be observed through a chemical change and can't be touched Example: flammability, toxicity, burning Observed Chemical Changes: light, heat, gas, color change, odor, sound |
| Physical properties | stays the same down to the molecular level; produces a substance that looks different but is still the same Example: freezing water, gas -> liquid |
| Pure Substances | have definite composition; can be chemically bonded; either compound or element; doesn't vary and can't be filter Example: salt or sugar |
| Mixtures | not chemically bonded. physical mix; composition varies by how it was made; can be filtered Example: salt water (salt dissolved) |
Created by:
jennahamilton
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