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Ch 1 and Ch 2 Review Flashcards | StudBud
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Ch 1 and Ch 2 Review
Ch 1 and Ch 2 Review
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Describe chemistry.
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40 cards
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Answers
1
Which is an example of a physical property?
ability to change chemical composition
color
ability to tarnish
ability to rust
2
Which of the following is a heterogeneous mixture?
steel
soil
air
salt water
3
Which classifies a liquid?
Definite shape, Definite volume
Indefinite shape, definite volume
Indefinite shape, indefinite volume
Definite shape, indefinite volume
4
Which is an example of a heterogeneous mixture?
Water
Sugar water
Stainless steel
Ranch dressing
5
Which does NOT indicate a chemical change?
Gas production
Transfer of energy
Boiling
Formation of precipitate
6
A gaseous state of substance that is a liquid or solid at room temperature is a _____.
gas
vapor
mixture
element
7
A(n) ____ is composed of two or more elements chemically combined in fixed proportion.
element
compound
mixture
substance
8
What is a phase?
Substance that cannot be changed into simpler substances
Amount of matter an object contains.
Gaseous substance
Part of a sample having uniform composition and properties.
9
Which is a chemical property?
Density
Boiling Point
Color
Ability to rust
10
What is a chemical reaction?
A type of phase change.
Process that substances are changed to different substances.
When substances cannot be broken down by chemical means
The process that separates a solid from the liquid.
11
Which of the following is a chemical property of water at 4 C?
its state
its temperature
its color
its ability to decompose into hydrogen and oxygen
12
Which of the following best describes an example of pure chemistry?
testing the effects of lower concentrations of a drug on humas
finding an antidote for a new strain of virus
developing a cure for shingles
studying chemicals containing carbon
13
Which state of matter has a definite volume and takes the shape of its container?
gas
liquid
solid
both liquid and gas
14
Which classifies a solid?
Indefinite shape, indefinite volume
Indefinite shape, definite volume
Definite shape, definite volume
Definite shape, indefinite volume
15
Which is NOT an example of matter?
Chemistry book
Smoke
Heat
Air
16
Which best describes pure chemistry?
Research that is directed towards a practical goal
Pursuit of chemical knowledge for its own sake
17
Which best describes the term homogeneous?
Mixture that cannot be broken down further
Mixture with a uniform compostion
Mixture that does not have a uniform composition
Mixture that is a blend of two or more components
18
Which of the following does NOT indicate a chemical change may have taken place?
melting
gas production
energy transfer
precipitate formation
19
Which step in scientific method requires you to use your senses to obtain information?
designing an experiment
stating a theory
revising your hypothesis
making an observation
20
A hypothesis is a
procedure used to test a proposed explanation
proposed explanation for an observation
well-tested explanation for a broad set of observations
summary of the results of many observation
21
What is a mixture?
A physical blend of two or more components.
Substance that cannot be changed into simpler substances.
Starting substance in a chemical reaction
Part of a sample having a uniform composition.
22
What is an example of an extensive property?
Absorbancy
Mass
Hardness
Color
23
What is the conservation of mass?
Mass of reactants = Mass of products
Mass of reactants > Mass of Products
Mass of reactants < Mass of products
24
Which defines a chemical reaction?
A change in volume
A changes in physical properties
A change in chemical properties
A change in mass
25
_______ can be broken down into simpler substances by a chemical change.
Compounds
Elements
Mixtures
Solutions
26
What is the variable that is observed in an experiment?
independent
controlling
dependent
manipulated
27
____________ is the starting substance in a reaction.
Compound
Mixture
Product
Reactant
28
What is an element?
A physical blend of two or more components
A mixture of several different types of atoms
Sample of a substance having uniform properties
Substance that cannot be changed into simpler substances
29
A substance that can be separated into two or more substances by a chemical change is
a mixture
a compound
an element
a solution
30
Which of the following is used for chemical symbols today?
drawings
letters
numbers
icons
31
What must occur for a change to be a chemical reaction?
There must be a change in physical properties
The change must involve a change in volume
There must be a change in chemical properties
The change must involve a change in mass
32
A process that a liquid is boiled to produce a vapor that is condensed again into a liquid is..
Condensation
Chemical Reaction
Distillation
Evaporation
33
The study of the composition of matter and the changes that matter undergoes is ____.
chemistry
biology
physics
geology
34
Describe mass.
A type of compound
A type of matter.
Amount of matter an object contains.
Force of gravity.
35
What is a heterogeneous mixture?
Mixture not uniform in composition.
The starting substance in a reaction.
A substance formed in a chemical reaction.
Mixture uniform in composition.
36
A substance formed in a chemical reaction is a ....
product
reactant
chemical
mixture
37
Which is NOT a physical property?
Color
Flammability
Melting point
Malleability
38
What must be done to be certain a chemcial change has taken place?
Check the composition of the sample before and after the change
Demonstrate that a release of energy occured after the change
Check for the production of bubbles before and after the change
Demonstrate that energy was absorbed by the reactants after the change
39
Which is an example of a homogeneous mixture?
Italian salad dressing
Mud
Chicken noodle soup
Sugar water
40
What is a theory?
procedure used to test a proposed explanation
summary of the results of many observations
well-tested explanation for a broad set of observations
proposed explanation for an observation
