Law of Conservation of Mass Flashcards
Quantitative
Observations made when counting and measuring.
Accuracy
How close your measurement is to the actual (true) value.
Precision
Getting the same results with repeated measurements; having more detail in your measurements.
Variable
A factor (part) of an experiment that changes
Independent Variable (IV)
The factor that is being tested it is the cause of the change.
Dependent Variable (DV)
The factor that is being observed to see the effect.
Constant
A factor of an experiment that should not change. Most parts of the lab should remain constant.
Observation
Something you can see, hear, touch, taste or smell and document; cannot be argued; everyone agrees.
Inference
A conclusion that you make from your observations; can be argued; not everyone agrees.
Meniscus
The curved surface of a liquid in a glass tube.
Margin of Error
A measurement of the accuracy of the results of a survey.
Dissolve
The act of a solid mixing into a liquid.
Boiling
Steaming or bubbling up under the action of heat.
Open System
An experiment without a lid or top to it.
Estimation
An educated guess.
Mass
A collection of atoms and molecules forming objects.
Chemical Change
Results:
1) A gas was produced
2) Energy was created
3) A new substance was created
4) It’s hard to get back to the original substance
Melting
A solid warming up and becoming a liquid.
Freezing
A liquid getting so cold it turns into a solid.
Closed System
A system with a lid and container, so no extra mass can ruin the experiment.
Metric System Prefixes
Deka, hecto, kilo, deci, centi, and milli.
Matter
A physical substance that occupies space and possesses mass
Physical Change
Changes affecting the form of a chemical substance, but not its chemical composition.
Condensation
Water that collects as droplets on a cold surface when humid air is in contact with it.
Conserve
Protect something from harm or destruction.
Law of Conservation of Mass
Mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.
