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) |