WorksheetsUnit 9 Chemistry Vocab
Total questions: 26
Worksheet time: 13mins
What is a Molecule?
you do not know
two or more atoms held together by covalent bonds
substance formed by the chemical combination of two or more elements in definite proportions
some type of food
What is a compound?
substance formed by the chemical combination of two or more elements in definite proportions
A combination of chemical symbols and numbers to represent a substance
two or more atoms held together by covalent bonds
A number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound.
T/F: a chemical formula is a combination of chemical symbols and numbers to represent a substance
false
true
What is a subscript?
material composed of two or more elements or compounds that are physically mixed together but not chemically combined
An orderly, three-dimensional pattern of ions or atoms in a solid
A combination of chemical symbols and numbers to represent a substance
A number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound.
What is a crystal? ( 2 ANSWERS)
An orderly, three-dimensional pattern of ions or atoms in a solid
you do not know
something shiny and clear
material composed of two or more elements or compounds that are physically mixed together but not chemically combined
T/F: a mixture is a material composed of two or more elements or compounds that are physically mixed together but not chemically combined
true
false
What is a heterogeneous mixture?
material composed of two or more elements or compounds that are physically mixed together but not chemically combined
A mixture that is not uniform in composition; components are not evenly distributed throughout the mixture
a mixture in which the composition is uniform throughout
What is an homogeneous mixture?
you do not know
a mixture in which the composition is not uniform throughout
a mixture in which the composition is uniform throughout
a rock
T/F: a solution is a mixture that forms when one substance dissolves another.
false
true
What is a solvent?
you do not know.
A substance that is dissolved in a solution.
A liquid substance capable of dissolving other substances
A mixture that forms when one substance dissolves another.
What is a solute?
A liquid substance capable of dissolving other substances
A substance that is dissolved in a solution.
you do not know
a process used to separate the parts of a mixture by particle size
T/F: Sifting is a process used to separate the parts of a mixture by particle size
False
True
What is Filtration?
the process that separates a solid from the liquid in a heterogeneous mixture
you do not know
a process used to separate the parts of a mixture by particle size
The change of a substance from a liquid to a gas
What is evaporation?
An educated guess
the process that separates a solid from the liquid in a heterogeneous mixture
The change of a substance from a liquid to a gas
you do not know.
T/F: a hypothesis is an educated guess
true
false
What is density?
an educated guess
mass per unit volume
the temperature at which a substance changes from a liquid to a gas
you do not know
What is boiling point?
mass per volume
you do not know
the temperature at which a substance changes from a liquid to a gas
the temperature at which a substance changes from a solid to a liquid
T/F: melting point is when the temperature at which a substance changes from a solid to a liquid
true
false
What is solubility?
a change of matter from one form to another without a change in chemical properties
the temperature at which a substance changes from a solid to a liquid
A measure of how much solute can dissolve in a given solvent at a given temperature.
you do not know
What is a physical change?
a change of matter from one form to another without a change in chemical properties
you do not know
A measure of how much solute can dissolve in a given solvent at a given temperature.
A change that occurs when one or more substances change into entirely new substances with different properties.
T/F:a chemical change is a change that occurs when one or more substances change into entirely new substances with different properties.
false
true
What is a chemical reaction?
A change that occurs when one or more substances change into entirely new substances with different properties.
process that changes one set of chemicals into another set of chemicals
you do not know
the action or process of observing something or someone carefully or in order to gain information.
What is an observation?
a substance that takes part in and undergoes change during a reaction.
process that changes one set of chemicals into another set of chemicals
the action or process of observing something or someone carefully or in order to gain information.
you do not know
T/F: a reactant is a substance that takes part in and undergoes change during a reaction.
false
true
T/F: a chemical equation is a way to describe a chemical reaction using chemical formulas and other symbols
true
false
T/F: Law of Conservation of Mass is the law that states that mass can be created or destroyed in ordinary chemical and physical changes
false
true
