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WorksheetsChemical and Physical Changes
Total questions: 50
Worksheet time: 25mins
Identify the property of the substance that is changing.
Composition
Boiling Point
Melting Point
Volume
A solution of salt water is boiled. The water evaporates and solid salt remains. Which statement is true?
The salt has undergone a physical change, and the water has undergone a chemical change
The salt and water have both undergone a physical change
The salt and water have both undergone a chemical change
The salt has undergone a chemical change and the water has undergone a physical change
A change in ________, such as a liquid changing to a gas, is an example of a physical change
Charge
Location
Balance
State
Jeremy decides to put an unopened soft drink in the freezer. Several hours later Jeremy goes to retrieve the can from the freezer only to notice that the can has burst. This demonstrates that the ________ of the soft drink has change
Volume
Molecular Formula
Color
Matter
The chemicals that are created in a chemical reaction are called
Reactants
Products
Atoms
Coefficients
How many Oxygen atoms are in 2NO3?
2
3
9
6
Which statement describes a physical change?
Calcium is added to acid and hydrogen gas is produced
Sodium metal reacts explosively with oxygen
Iron oxidizes and rusts
Lead is heated and becomes more viscous (thick)
Which of the following is an example of a chemical change?
A mixture of flour, sugar, eggs and butter is baked to make a cake
Flour and sugar are sifted together into a measuring cup
The shell of an egg breaks when struck against a hard surface
Chocolate squares are melted to make cake icing
A _______occurs and results in the formation of a color change, temperature change and gas
Solid
Acids
Physical Change
Chemical Change
Simple sugar has a molecular formula of
C12H22O11
CHO
C6H12O6
CO2
Which of the following best represents how many atoms are in a molecule?
Coefficients and Subscripts
Signs and Symptoms
Symbols
The picture shows a piece of paper being cut in half with scissors. Which of the following statement is true of this process?
It is a physical change because the paper only changed its state of matter
It is a chemical change because the paper particles were broken and rearranged
It is a physical change because the substance remained the same
It is a chemical change because the substances was changed to something new
Jayson mixes two chemicals together in a beaker. The beaker heats up quickly. What kind of change most likely occurred?
No change occurred
A mixture formed
Physical change
Chemical change
Carbon dioxide (CO2) is a gas. What best describes it?
It is a new kind of element
It is a molecule made of atoms
It is a molecule and no longer has atoms
It has atoms, so it cannot be a molecule
After working in the yard all day, I went to Tastee Freeze to get an ice cream cone. Mr. McGonagle wanted an ice cream cone as well. Before I could get home, the ice cream was dripping down the cone and onto my hand. This is an example of a
Travesty to ice cream
Chemical Change
The pink bunnies ran through the field
Physical Change
Which one of the following statements is true?
Neither chemical nor physical changes involve a change in appearance
Both chemical and physical changes can involve a change in appearance
Only physical changes involve a change in appearance
Only chemical changes involve a change in appearance
Water is made of H2O. What are the particles that compose this molecule?
Atoms
Oxygen
Water
Compounds
The temperature at which a liquid can change to a solid is the
Melting Point
Boiling Point
Freezing Point
Condensation
Group 17 on the periodic table is:
Transition Earth Metals
Gold
Nobel Gases
Halogens
The smallest element on the periodic table has an atomic number 1, has one proton, 1 electron and 0 neutrons. Which element is this?
Helium
Hydrogen
Gold
Oxygen
Ms. Fields decides to do a demonstration for her class with a piece of notebook paper. Using a balance, Ms. Fields discovers that the mass of the paper is 20g. She then takes the piece of paper and cuts it into several small pieces. The total mass of the small pieces is 20g. What has Ms. Fields demonstrated for her class?
Physical change involving a change in size and shape
Chemical change involving a change in molecules
Molecular Formula
Theoretical math
A plant uses energy from the sunlight to create oxygen and glucose from carbon dioxide and water. Which statement is true about the changes that have occurred?
A chemical change has occurred because new compounds have been produced
A physical change has occurred because the substances are still gases
A physical change has occurred because the plant looks different
A chemical change has occurred because energy was needed
Which of the following does not represent a chemical property?
Rusting
Density
Tarnishing
Fireworks Exploding
Both the physical and chemical properties of a substance can change when a substance undergoes a chemical reaction. When a log is burned, a chemical reaction occurs. The log is transformed into ash, water vapor and carbon dioxide. The log is flammable or able to be burned, however, the ashes that are produced are no longer flammable. The volume of the log also changes into gas and ash.
Volume is a __________property. Flammability is a ________ property.
Chemical, Chemical
Chemical, Physical
Physical, Chemical
Physical, Physical
What are some examples of heterogeneous mixtures?
Lucky Charms, fruit salad, Chex mix, vegetable soup
Vegetable soup, oil, salt, fruit salad
Salt, Chex mix, oil, Lucky Charms
oil, fruit salad, potato chips, salt
In a covalent bond, electrons are _________ between the two nonmetals.
Shared
Transferred
In ionic bonds, electrons are __________ from the metal to the nonmetal.
Shared
Transferred
What type of bond is formed between two nonmetals?
Ionic
Covalent
Metallic
What type of bond is formed between two metals?
Ionic
Covalent
Metallic
Which type of bond is formed between a metal and nonmetal?
Ionic
Covalent
Metallic
Vertical columns that are grouped with similar properties are called _________.
Families
Periods
Horizontal rows on the periodic table are called_________.
Families
Groups
Period
Where are metals located on the Periodic Table?
Left
Right
Zigzag
Nonmetals are located on the _______.
Left
Right
Zigzag
Metalloids are located on the _______.
Left
Right
Zigzag
In terms of electrons, how does an Ionic Bond differ from a Covalent Bond?
Ionic bonds share electrons while Covalent bonds have electrons transferred
They both share electrons
The electrons in Ionic bonds are transferred from the metal to the nonmetal, while Covalent bonds share electrons
Is H2O Ionic or Covalent?
Ionic
Covalent
Is NaCl Ionic or Covalent?
Ionic
Covalent
Is AlCl3 Ionic or Covalent?
Ionic
Covalent
What do subscripts represent?
Number of elements present
Number of molecules present
Number of compounds present
Number of atoms present
What do coefficients represent?
What do coefficients represent?
Number of elements present
Number of molecules present
How many Hydrogen atoms are in C4H8O2?
4
2
8
1
How many Sodium atoms are present in NaNO3?
3
2
10
1
Which of the following represents a physical property of a nonmetal?
Luster
Brittle
Conductor
High Density
Which is true of metals?
They are always solid at room temperature
They are nonconductors of electricity
They are located on the right side of the periodic table
They have a high density and malleability
An example of a physical property is ___________
Flammability
Ability to Rust
Acidic
Color
What is NOT a physical property of a piece of paper?
It is white
It burns
It is smooth
It is flat
Color and shape are both ____________
Physical Properties
Chemical Changes
Chemical Properties
Chemical Properties
Magnetism is an example of a __________
Chemical Property
Physical Property
Chemical Change
Physical Change
Which of the following is an example of a chemical property?
Boiling Point
Ductile
Ability to Rust
Brittle
