WorksheetsHonors Chemistry Unit 2 Test Review
Total questions: 110
Worksheet time: 1hrs 3mins
What is the definition of a physical property?
A property that determines the chemical change of a substance
A characteristic of a substance that can be observed or measured without changing the identity of the substance
The ability of a substance to catch fire
A property that describes how a substance reacts with oxygen
Can a physical property be observed without changing the identity of a substance?
Yes
No
Only if the substance is a gas
Only if the substance is heated
Which physical property describes the amount of mass per unit volume of a substance?
Hardness
Color
Density
Boiling point
What physical property determines how hard or soft a material is?
Density
Hardness
Melting point
Odor
Is the melting point of a substance a physical or chemical property?
Physical property
Chemical property
Both physical and chemical
Neither
What physical property can you observe with your sense of smell?
Color
Density
Odor
State of matter
What physical property is identified by the color of a substance?
Hardness
Density
Is the state of matter (solid, liquid, gas) a physical or chemical property?
Chemical property
Physical property
Neither
Both
Which physical property can be measured by heating a substance until it changes from liquid to gas?
Density
Boiling point
Reactivity
Corrosion
Would the density of a substance change if it undergoes a chemical reaction? Why or why not?
Yes, because the substance’s mass remains constant
Yes, because a chemical reaction changes the substance's identity
No, because the volume never changes
No, because density is a physical property
What is the definition of a chemical property?
A property that describes how a substance changes into a new substance
A property that can be observed without changing the substance
The color or odor of a substance
The boiling point of a substance
Can chemical properties be observed without changing the substance into something else?
Yes
No
Only for solids
Only under specific conditions
What chemical property describes a material's ability to catch fire?
Corrosion
Reactivity
Flammability
Toxicity
Is the tendency of a metal to rust a physical or chemical property?
Which chemical property describes the reaction of a substance when exposed to oxygen?
Hardness
Melting point
Oxidation
Odor
How would you classify a substance's ability to corrode in the presence of moisture: as a physical or chemical property?
Physical property
Chemical property
Both
Neither
What chemical property refers to how reactive a substance is with other chemicals?
Flammability
Reactivity
Oxidation
Density
Is the toxicity of a substance considered a chemical or physical property?
Chemical property
Physical property
Neither
Both
Would acidity, such as the pH of a substance, be considered a chemical or physical property?
Physical property
Chemical property
Both
Neither
Which of these are physical properties?
Length
Corrosion
Density
Mass
Flammability
Which of these are chemical properties?
Length
Corrosion
Density
Mass
Flammability
When a substance undergoes oxidation, does it retain its original identity, or has it undergone a chemical change?
Retains its identity
Undergoes a chemical change
No change occurs
Only physical changes take place
What is the definition of a physical change?
A change in which a substance’s identity is altered
A change that involves the formation of new substances
A change in a substance that does not affect its identity
A change that always results in a gas being produced
Does a physical change alter the identity of a substance?
Yes, it completely changes the substance
No, the identity remains the same
Yes, it always changes into a new substance
It depends on the temperature
Is melting a physical or chemical change?
Physical change
Chemical change
Neither
It can be both
Is cutting grass an example of a reversible or irreversible physical change?
Reversible
Irreversible
It's both reversible and irreversible
Depends on the type of grass
What type of change is it when wood is chopped into smaller pieces?
Chemical change
Physical change
No change
Is pulverizing a rock a physical or chemical change?
A. Chemical change
B. Physical change
C. Nuclear change
D. None of the above
Can physical changes be reversible, irreversible, or both?
A. Reversible only
B. Irreversible only
C. Both reversible and irreversible
D. Neither reversible nor irreversible
What kind of physical change occurs when water freezes?
A. It turns into a new substance
B. Chemical change
C. Reversible physical change
D. Irreversible physical change
If a piece of wood is ground into sawdust, what type of change is this?
A. Physical change
B. Chemical change
C. No change
D. Reformation of wood
Does a change of state (e.g., solid to liquid) count as a physical change?
A. Yes, it is a physical change
B. No, it is a chemical change
C. It is both a physical and chemical change
D. It is neither a physical nor chemical change
What is another term for chemical change?
A. Phase transition
B. Physical reaction
C. Chemical reaction
D. Condensation
In a chemical change, what are the starting substances called?
A. Reactants
B. Products
In a chemical change, what are the resulting new substances called?
Reactants
Catalysts
Products
Solvents
Is burning wood a physical or chemical change?
Physical change
Chemical change
No change occurs
Reversible change
Is baking a cake an example of a physical or chemical change?
Physical change
Chemical change
No change occurs
Phase change
Is milk going sour a physical or chemical change?
Physical change
Chemical change
No change occurs
It remains fresh forever
What type of change occurs when food is digested in the stomach?
Physical change
Chemical change
No change occurs
Reversible change
Is boiling an egg considered a physical or chemical change?
Physical change
Chemical change
No change occurs
Reversible physical change
What kind of change is rotting food: physical or chemical?
Physical change
Chemical change
Phase change
During a chemical reaction, does the substance retain its original identity, or is it changed into something new?
It retains its original identity
It is changed into something new
Both happen at the same time
It can either retain or change depending on the temperature
What state of matter has a definite shape and a definite volume?
Liquid
Gas
Solid
Plasma
How do particles in a solid move?
Flow freely
Vibrate around fixed axes
Move randomly
None of the above
Which state of matter takes the shape of its container but has a definite volume?
Solid
Liquid
Gas
Plasma
How do particles in a liquid behave?
Vibrate in place
Move freely and are attracted to each other
Move randomly with no attraction
None of the above
What state of matter has neither a definite shape nor a definite volume?
Solid
Liquid
Gas
Plasma
How do particles in a gas move?
Vibrate around fixed axes
Move randomly with little or no attraction
Flow freely
None of the above
What makes gases highly compressible compared to solids and liquids?
High density
Large spaces between particles
Fixed shape
None of the above
What are the characteristics of plasma that distinguish it from gases?
Fixed shape and volume
Charged particles and responds to magnetic fields
Low temperature
None of the above
How do particles in a plasma differ from those in a gas?
Plasmas have fixed shapes
Plasmas consist of charged ions and free electrons
Plasmas have lower energy
None of the above
Where are human-made plasmas found?
In liquids
In solids
In fluorescent lights and plasma TV screens
None of the above
What natural phenomena consist of plasma?
Waterfalls
Lightning and the northern lights
Earthquakes
None of the above
How do plasmas respond to magnetic fields?
They do not respond
They can be repelled
They can be attracted
They can conduct electricity
Why is plasma able to conduct electricity while gases cannot?
Gases have fixed shapes
Plasma consists of charged particles
Plasma has no volume
None of the above
What state of matter has charged particles called ions?
Solid
Liquid
Gas
Plasma
Why do liquids have a definite volume but no definite shape?
Particles are tightly packed
Particles are free to move
They have a fixed structure
None of the above
What happens to the volume of a gas when it is compressed?
It decreases
It increases
It remains the same
It becomes solid
What happens to the shape of a liquid when it is poured into a container?
It stays the same
It changes to fit the container
It becomes solid
None of the above
What state of matter is the sun made of?
Solid
Liquid
Gas
Plasma
How does the random motion of gas particles compare to the movement of liquid particles?
Gas particles move more freely
Liquid particles are fixed
Gas particles are less energetic
None of the above
What causes particles in a solid to vibrate rather than move freely like in a gas?
Strong forces between particles
High temperature
Low density
None of the above
What is a phase change?
A change in temperature
A change in state of matter
A change in color
A change in size
What are the main states of matter?
Solid, liquid, gas
Solid, liquid, plasma
Gas, plasma, energy
Solid, energy, gas
What typically causes a phase change?
Change in volume
Addition or removal of energy
Change in color
Increase in mass
What is melting?
Liquid to gas
Solid to liquid
Gas to solid
Liquid to solid
How do particles behave during melting?
They lose energy and slow down
They gain energy and vibrate more vigorously
They move in fixed positions
They form a solid structure
Provide an example of melting.
Water boiling
Ice melting into water
Steam condensing
Water freezing
What is freezing?
Solid to liquid
Liquid to gas
Gas to liquid
Liquid to solid
What happens to particles during freezing?
They gain energy and vibrate
They lose energy and form fixed positions
They break free and move around
Provide an example of freezing.
Ice melting
Water boiling
Water freezing into ice
Steam forming
What is vaporization?
Gas to solid
Liquid to gas
Solid to liquid
Liquid to solid
How do particles behave during vaporization?
They lose energy
They gain enough energy to break free
They form fixed positions
They vibrate less
What are the two types of vaporization?
Freezing and melting
Evaporation and condensation
Evaporation and boiling
Boiling and freezing
What is evaporation?
Occurs at the surface of the liquid
Occurs throughout the liquid
Happens only at boiling point
Turns gas into liquid
What is boiling?
Occurs only at the surface
Happens at any temperature
Occurs throughout the liquid
Turns solid into liquid
Provide an example of vaporization.
Water freezing
Ice melting
Water boiling into steam
Gas condensing
What is condensation?
Solid to liquid
Gas to liquid
Liquid to gas
Liquid to solid
How do particles behave during condensation?
They gain energy and move apart
They lose energy and move closer together
They vibrate vigorously
They remain unchanged
Provide an example of condensation.
Ice melting
Water boiling
Steam condensing into water droplets
Water freezing
What is the relationship between heat and melting?
Heat is removed during melting
Heat is added during melting
Heat has no effect
Heat is only needed for freezing
Are phase changes reversible? Provide an example.
Yes, like ice melting back to water
No, they are permanent
Only in certain conditions
Yes, like water boiling to steam
What are the main steps of the scientific method?
Making observations
Formulating a hypothesis
Testing the hypothesis
All of the above
What is a hypothesis?
A proven fact
A tentative explanation that can be tested
A scientific law
An observation
How is a hypothesis tested according to the scientific method?
By making new observations
By ignoring contrary evidence
By publishing it
What happens if new observations contradict an existing hypothesis?
A) The hypothesis is proven
B) A new hypothesis is formulated
C) The hypothesis is accepted as a law
D) The experiment is discarded
Define a scientific theory.
A) An untested idea
B) A hypothesis with no evidence
C) A well-substantiated explanation based on evidence
D) A statement summarizing observations
What distinguishes a theory from a hypothesis?
A) Theories are untestable
B) Theories are well-supported by evidence, while hypotheses are not
C) Hypotheses explain phenomena
D) There is no difference
What is a scientific law?
A) A proven hypothesis
B) A statement summarizing results of observations
C) An explanation of why something happens
D) A theory with no exceptions
Provide an example of a scientific law.
A) Theory of Relativity
B) Newton's Law of Gravity
C) Cell Theory
D) Theory of Evolution
How does a scientific law differ from a scientific theory?
A) Laws describe patterns; theories explain them
B) Laws are more important than theories
C) Laws can be proven; theories cannot
D) There is no difference
Why is it important for experimental data to be reproducible by other scientists?
A) It ensures accuracy and reliability
B) It is not important
C) To confuse the scientific community
D) To create new theories
What must theories do to remain valid in the scientific community?
A) Agree with every observation
B) Be accepted by all scientists
C) Be continually tested and supported
D) Avoid testing
Explain why theories are continually tested.
A) To prove them wrong
B) To confirm their validity and adjust as necessary
What does a scientific law describe?
A specific experiment
A pattern or event that is always true under specific conditions
Theories that explain observations
Hypotheses that have been disproven
What key point distinguishes laws from theories?
Laws tell us what happens; theories explain why it happens
There is no distinction
Laws are more complex than theories
Theories are always wrong
What is an example of a scientific theory?
Law of Thermodynamics
Theory of Evolution
Newton's Laws of Motion
Atomic Theory
How do theories explain phenomena in the natural world?
By providing testable predictions
By stating facts
By summarizing observations
They do not explain phenomena
What role does observation play in the scientific method?
It is the last step
It is the basis for forming hypotheses and testing
It is irrelevant
It only occurs after experiments
Can a scientific theory become a scientific law? Why or why not?
Yes, if it is proven
No, theories and laws serve different purposes
Yes, theories are always converted to laws
No, laws cannot change
How many significant figures are in the number 45000?
(a) significant figures
How many significant figures are in the number 0.000560?
(a) significant figures
How many significant figures are in the number 1204?
(a) significant figures
How many significant figures are in the number 600.09?
(a) significant figures
How many significant figures are in the number 0.04560?
(a) significant figures
How many significant figures are in the number 5.00030?
(a) significant figures
How many significant figures are in the number 0.0000007?
(a) significant figure
How many significant figures are in the number 950,000?
(a) significant figures
How many significant figures are in the number 8.001?
(a) significant figures
How many significant figures are in the number 0.0070000?
(a) significant figures
