Review for Fall Final Exam Chem I

Define the term 'element'.

• found on the Periodic Table, made up of approximately 118.

• a compound consisting of two or more different atoms.

• a mixture of various substances that can be separated.

• a type of molecule that contains only one type of atom.

Define the term 'compound'.

• made up of two or more elements.

• a single element in its pure form.

• a mixture of different substances.

• a type of chemical reaction.

Define the term 'mixture'.

• two or more pure substances mixed in any ratio.

• a single pure substance with a fixed composition.

• a chemical compound formed by a chemical reaction.

• a solution with a uniform composition throughout.

Define the term 'heterogeneous mixture'.

• a mixture where the components can be physically seen.

• a mixture where the components are uniformly distributed.

• a mixture that consists of only one type of molecule.

• a mixture that cannot be separated by physical means.

Define the term 'homogeneous mixture'.

• parts of the mixture cannot be seen or “picked out”.

• it consists of different substances that remain physically separate.

• it is a mixture where the components can be easily distinguished.

• it is a mixture that has a variable composition.

Define the term 'accuracy'.

• how close a measurement is to the true or accepted value.

• the ability to repeat a measurement with the same result.

• the range within which a measurement is considered valid.

• the speed at which a measurement can be obtained.

Define the term 'precision'.

• how close multiple measurements are to each other.

• the degree to which a measurement agrees with the true value.

• the ability to measure small differences in a quantity.

• the consistency of a measurement over repeated trials.

Define the term 'matter'.

• anything that has mass or takes up space.

• a form of energy that can be transferred between objects.

• a type of force that acts at a distance.

• a concept used to describe the flow of time.

Define the term 'chemistry'.

• the study of matter and the changes it undergoes.

• the study of celestial bodies and the universe.

• the study of living organisms and life processes.

• the study of past human activities through artifacts.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-6

Define the term 'physical property'.

• a property observed without changing chemical composition.

• a property that involves a chemical reaction.

• a property that is only theoretical and cannot be measured.

• a property that changes the substance into a new one.