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WorksheetsCh. 2 Quiz Review Chemistry Study Guide
Total questions: 27
Worksheet time: 14mins
What is mass?
The amount of matter in an object
The space an object takes up
The color of an object
How easily something breaks
What is volume?
The weight of an object
The amount of space an object occupies
The density of an object
The temperature of an object
What is an intensive property?
A property that changes with size
A property unique to a certain mixture
A property that does not depend on the amount of matter
A property measured only in gases
What is an extensive property?
A property that doesn’t depend on the sample size
A property that depends on the amount of matter present
A chemical reaction with oxygen
A property unique to solids
What is the term for matter with a uniform and definite composition?
Heterogeneous mixture
Substance
Solution
Molecule
What is a physical property?
How substances react with one another
A quality of matter observed without changing its composition (e.g., color, density, melting point)
A property only visible under a microscope
A property that can only be measured during a chemical reaction
What are the 3 states of matter?
Solid (definite shape/volume), Liquid (definite volume, variable shape), Gas (no definite shape/volume)
Solid, Liquid, Plasma
Solid, Gas, Plasma
Solid, Liquid, Vapor only
What is a physical change?
A change that alters the composition of matter
A change that alters appearance but not composition (e.g., melting, boiling, cutting, freezing)
A nuclear reaction
A reaction that produces a gas only
What is a mixture?
A. A pure chemical element
B. A substance with a definite composition
C. A physical blend of two or more components
D. An ionic compound
What is a homogeneous mixture?
A mixture with two visible layers
A mixture with uniform composition, one phase (also called a solution)
A substance that separates easily
A mixture with at least three phases
What is a heterogeneous mixture?
A mixture not uniform in composition, with two or more phases
A mixture that looks identical throughout
A compound
A solution
What are the two main ways to separate mixtures?
Filtration and Distillation
Filtration and Evaporation only
Distillation and Melting
Describe filtration.
Heating a mixture to separate components
Separating a solid from a liquid using a filter
Breaking down compounds chemically
Stirring a mixture until particles dissolve
Describe distillation.
Filtering out a solid
Using magnets to separate metals
Separating substances based on differences in boiling points
Using density to separate mixtures
What are the two groups into which substances can be classified?
Metals and Nonmetals
Elements and Compounds
Mixtures and Solutions
Liquids and Solids
How are substances different from mixtures?
Substances are always solids
Substances are always liquids
Substances have a fixed composition; mixtures can vary
Mixtures cannot be separated
What are chemical symbols, and why do we use them?
Shorthand notations for elements, used for efficiency and universal understanding
Diagrams of chemical reactions
Ways to show density
Symbols for lab safety
In a chemical formula, what do subscripts mean?
The number of atoms of each element in the compound
The weight of the element
The number of molecules
The number of bonds
What is a chemical property?
A characteristic observed during a chemical reaction (e.g., flammability, reactivity)
A property observed without changing composition
The weight of a substance
The shape of a substance
What happens during a chemical reaction?
Atoms are destroyed
Substances change into new substances with different compositions
Molecules just rearrange physically
Mass disappears
What is a reactant? What is a product?
Reactants are starting substances; products are new substances formed
Products are starting materials; reactants are the result
Both are always gases
Both are always solids
What are four possible clues of a chemical reaction?
Gas formation, color change, temperature change, formation of a precipitate
Only gas formation
Change in density only
Evaporation only
What is the BEST way to tell if a chemical change has occurred?
A. A new gas forms
B. The production of a substance with a new chemical composition
C. The substance is heated
D. The color changes
What is a precipitate?
A gas that bubbles out of solution
A solid that forms from a solution during a chemical reaction
A liquid that evaporates
A melted solid
What is the law of conservation of mass?
Matter can be created and destroyed
Mass is neither created nor destroyed in a chemical reaction
Energy is always lost in reactions
Only applies to solids
An element is the simplest form of matter.
A compound is a substance made of two or more elements chemically combined.
