Scientific Measurements
This term refers to how close a measurement is to the "true" or accepted value.
What is accuracy?
This technique is used to convert numbers into different units without changing their value.
What is dimensional analysis?
This type of pure substance cannot be broken down into anything simpler or more stable.
What is an element?
These properties, such as density and boiling point, do not depend on the amount of matter present.
What are intensive properties?
This law states that matter is never created or destroyed, only changed in form.
What is the Law of Conservation of Mass?
These are the two types of observations: one is objective/sensory and the other is subjective/perceptual.
What is observation and inference?
How many significant figures are in the measurement 107.0?
What is four (4)?
This is a "blended" mixture with a uniform composition that can be physically separated.
What is a homogeneous mixture (or solution)?
This state of matter is characterized by having a definite volume but an indefinite shape.
What is a liquid?
This term describes the sudden appearance of a solid during a chemical reaction.
What is a precipitate?
This is the SI system's base unit for measuring the amount of a substance.
What is the mole (mol)?
Convert 101,000 into proper scientific notation.
What is 1.01 x 105?
This type of pure substance is made of two or more different elements chemically combined.
These properties, such as mass and volume, do depend on the amount of matter present.
What are extensive properties?
Give three examples of evidence that a chemical reaction has occurred.
What is release of light, temperature change, color change, odor change, gas given off, or appearance of a solid?
This type of data is based on quantities, such as numbers and measurements.
What is quantitative data?
If you measure 12,135 mg, this is how many kilograms that is.
What is 0.012135?
This unevenly distributed mixture often has components that can be seen or will separate over time.
What is a heterogenous mixture?
Grinding, cutting, and dissolving are all examples of this type of change.
In a chemical change, the identity of the substance changes; as a result this also specifically changes in addition to identity.
What is energy?
To calculate this, you subtract the accepted value from your experimental value, divide by the accepted value, and multiply by 100.
What is percent error?
Fill in the Blank: When performing calculations, your final answer should not have more significant figures than the ______.
What is the least number of significant figures in the starting values?
This specific type of homogeneous mixture is formed when one metal is dissolved into another.
What is an alloy?
This type of property, such as reactivity or instability, can only be observed by changing the substance's identity.
What is a chemical property?
True or False: Chemical changes involve a change in energy but do NOT involve a change in the total amount of matter.
What is true?