WorksheetsSubstances and Mixtures Practice
Total questions: 42
Worksheet time: 24mins
Which of the following is a pure substance?
Salt water
Carbon dioxide (CO₂)
Brass
Air
Which is an example of a heterogenous mixture?
Salt dissolved in water
Sand and iron filings
Air
Vinegar
Which of the following is a compound?
Oxygen (O₂)
Hydrogen (H₂)
Water (H₂O)
Iron (Fe)
Which of the following is a heterogenous mixture?
Trail mix
Salt water
Kool-aid
Milk
Elements are substances that:
cannot be broken down into simpler substances by chemical means.
can be separated into different substances by physical means.
are always found in liquid form.
are mixtures of two or more substances.
Which statement best describes an element?
Cannot be broken down into simpler substances chemically
Are always liquids at room temperature
Are composed of two or more types of atoms
Can only exist as gases
Brass is made of copper and zinc melted together. Which classification best fits brass?
Element
Compound
Homogenous mixture
Heterogenous mixture
When comparing the attractive forces in sodium chloride (NaCl) crystals and sugar (C6H12O6) crystals, which evidence best supports that NaCl has stronger attractive forces?
A. NaCl is more flammable than sugar.
B. Sugar is less dense than NaCl.
C. Sugar dissolves more easily in water than NaCl.
D. NaCl has a much higher melting point than sugar.
A student stirs sugar into tea until it dissolves. The tea is an example of:
Heterogenous mixture
Compound
Homogenous mixture
Element
A rock contains flecks of quartz, feldspar, and mica that can be seen with the naked eye. Which classification fits best?
Element
Compound
Homogenous mixture
Heterogenous mixture
Which is NOT a mixture?
Blood
Air
Sodium chloride (NaCl)
Milk
Which of the following is a physical property of copper?
Reacts with oxygen
Can be shaped into a wire
Reacts with sulfur to form copper sulfide
Tarnishes in humidity
Which of the following is a chemical property?
Density of mercury
Melting point of ice
Reactivity with acid
Conductivity of silver
A piece of paper burns to produce ash and carbon dioxide. This is an example of a:
Physical property
Chemical change
Melting an ice cube is a:
Physical change
Chemical change
Formation of a compound
Example of decomposition
A student cuts a metal strip in half, then leaves one piece outside where it rusts. Which statement is correct?
Both are physical changes
Both are chemical changes
Cutting is physical; rusting is chemical
Cutting is chemical; rusting is physical
Which process is a chemical change?
Freezing water
Evaporating alcohol
Digesting food
Melting wax
Which of the following best describes a physical property?
Ability to react with oxygen
Flammability
Density
(No option provided)
Which observation indicates a chemical change?
Ice melts in a glass of water
A solid dissolves in water
A colorless liquid boils
A gas forms when vinegar reacts with baking soda
Sodium reacts explosively with water. Which property of sodium does this describe?
Density
Reactivity
Malleability
Color
A student crumbles a sheet of paper and burns part of it. Which option classifies both changes correctly?
Crumbling = chemical, burning = physical
Crumbling = physical, burning = chemical
Both = chemical
Both = physical
The density of a substance is defined as:
Mass ÷ Volume
Volume ÷ Mass
Weight ÷ Volume
Mass × Volume
A block of metal has a mass of 200 g and a volume of 50 cm³. Its density is:
0.25 g/cm³
2.5 g/cm³
4.0 g/cm³
250 g/cm³
An object floats in water. Which conclusion can you make about its density?
Greater than 1.0 g/mL
Equal to 1.0 g/mL
Less than 1.0 g/mL
A liquid has a mass of 45 g and fills a container with a volume of 15 mL. What is its density?
0.33 g/mL
3.0 g/mL
15 g/mL
30 g/mL
An unknown sample displaces 12.0 mL of water in a graduated cylinder. If its mass is 96 g, what is its density?
0.12 g/mL
1.2 g/mL
8.0 g/mL
12.0 g/mL
A block of aluminum has a mass of 27 g and density of 2.7 g/cm³. What is its volume?
0.10 cm³
10.0 cm³
7.3 cm³
29.7 cm³
According to KMT, particles of matter are:
At rest in solids
Constantly in motion
Only moving in gases
Randomly created and destroyed
Which state of matter has particles that vibrate in fixed positions?
Solid
Liquid
Gas
Plasma
Which state of matter takes both the shape and volume of its container?
Solid
Liquid
Gas
Crystal
Which statement about liquids is correct?
Which state of matter has the weakest forces of attraction between its particles?
Solid
Liquid
Gas
Plasma
In which state of matter are forces of attraction between particles the strongest?
Solid
Liquid
Gas
Plasma
Which of the following is explained by KMT?
Why solids have definite shapes
Why gases can expand to fill a container
Why liquids have definite volume but no definite shape
All of the above
Which change requires particles to overcome the greatest forces of attraction?
Melting solid to liquid
Freezing liquid to solid
Boiling liquid to gas
Condensing gas to liquid
Which description best matches a liquid?
A. Particles locked in place with strong attraction
B. Particles far apart with almost no attraction
C. Particles slide past each other
Particles close together but able to slide past one another. Which state of matter is described by the statement: 'Particles close together but able to slide past one another'?
Solid
Liquid
Gas
Plasma
A student compares ice, liquid water, and water vapor. Which statement explains the differences in their particle behavior?
Ice particles move fastest, gas slowest
Ice particles are fixed; liquid particles slide; gas particles move freely
Gas particles are packed tightly, solids are far apart
Liquids have no attraction between particles
The table to the left lists physical and chemical properties of three mystery substances. Which substance most likely has the strongest attractive forces between its particles?
Substance Y, because it is also soluble in water and not flammable.
Substance X, because it has the highest melting point and density, indicating strong particle attraction.
Substance Z, because it is highly flammable and has the lowest melting point.
All substances have the same level of attractive forces since they are all solids.
Which state of matter has definite volume but no definite shape?
Solid
Liquid
Gas
Plasma
A student claims: “Substance Q has stronger particle attractions than Substance R.” The data table below provides information about the two substances: Substance Boiling Point (°C) Solubility (g/100 mL water at 25°C) Q 1200 35 R 220 200 Which of the following best evaluates the student's claim?
The claim is wrong because Substance R is more soluble in water, showing it has stronger attractions overall.
The claim is supported because Substance Q has a much higher boiling point, suggesting stronger attractive forces between its particles.
The claim is wrong because Substance Q has lower solubility, meaning weaker attractions between particles.
The claim cannot be evaluated because there is not enough information about the substances’ densities.
When temperature increases, what happens to the speed of particles and their forces of attraction?
Speed decreases; attractions increase
Speed increases; attractions weaken
Speed increases; attractions strengthen
Speed decreases; attractions disappear
