Font size
WorksheetsPractice for Second Semster Science Final Exam
Total questions: 118
Worksheet time: 9hrs 31mins
Silver tarnishes when it comes in contact with hydrogen sulfide in the air. Is this a physical property or a chemical property?
Physical Property
Chemical Property
A banana is yellow. Is this a physical property or a chemical property?
Physical Property
Chemical Property
A sheet of copper can be pounded into a bowl. Is this a physical property or a chemical property?
Physical Property
Chemical Property
Gasoline is flammable. Is this a physical property or a chemical property?
Physical Property
Chemical Property
Barium melts at 725°C . Is this a physical property or a chemical property?
Physical Property
Chemical Property
Sodium and chlorine are two reactive and dangerous elements. Chlorine is a halogen gas that can cause respiratory damage and sodium is an alkali metal that reacts violently with water. What happens to the properties of sodium and chlorine when they react to form sodium chloride (NaCl), common table salt?
The properties of both sodium and chlorine change.
The properties of both sodium and chlorine remain the same.
The properties of sodium are different but chlorine remains a dangerous gas.
The properties of sodium remain the same but the properties of chlorine change.
Which action will result in a product with new chemical properties?
Shredding a newspaper
Breaking a mirror
Cutting wood
Popping popcorn
Students make a model of a volcano using a tray, a small paper cup, clay, baking soda, food coloring, dish soap and vinegar (acetic acid). First, they placed the paper cup on a large tray and covered the cup with clay to make it look like a volcano. Then, the students placed baking soda into the cup. Next, they added food coloring and dish soap to vinegar. Finally, the students poured the vinegar mixture into the clay. Immediately, bubbles and foam erupted from the model volcano. The students observed the model and recorded their observations of the changes in the substances that made the model volcano. A chemical property of baking soda demonstrated in this investigation is that baking soda _________.
reacts with vinegar (acetic acid)
reacts with oxygen
forms during an acid-base reaction
forms during the decomposition of water
The following table shows properties of four different sample materials. One of these materials is cork, a type of wood that floats in water. Given that the density of water is 1 g/mL, which of the samples is most likely cork?
Sample 1
Sample 2
Sample 3
Sample 4
The data table below lists some of the properties of matter. How do the properties of the elements compare with the properties of cellulose?
The physical and chemical properties of the elements are mostly different from the physical and chemical properties of cellulose.
The physical and chemical properties of the elements are mostly the same as the physical and chemical properties of cellulose.
The physical properties of the elements and cellulose are mostly different, but their chemical properties are mostly the same.
The physical properties of the elements and cellulose are the mostly the same, but their chemical properties are mostly different.
Which of the following is an example of a physical change?
Lighting a match
Breaking a glass
Burning of gasoline
Rusting of iron
Which of the following describes a chemical change?
A metal fork was melted.
A metal fork became bent.
A metal fork was cut in half.
A metal fork became rusted.
Which of the following is an example of a physical change but not a chemical change?
A log gives off heat and light as it burns.
A tree stores energy from the Sun in its fruit.
A penny lost in the grass slowly changes color.
A water pipe freezes and cracks on a cold night.
Jessi is completing an investigation. She could conclude a chemical change is taking place if which of the following occurs?
The size gets smaller.
A new substance forms.
The state of matter changes.
The shape becomes different.
Which are three examples of physical changes?
Water freezing, gasoline evaporating, a nail rusting
Water boiling, a balloon bursting, a candle melting
Wood burning, a marshmallow melting, a paper tearing
Gasoline burning, an egg rotting, fireworks exploding
Which is evidence that elements can combine to form new compounds?
Melting a solid
Freezing a liquid
Moving a piece of metal with a magnet
Pouring two liquids together to create a solid precipitate
Which of the following represents a chemical reaction?
A sugar cube dissolving in water.
Ice cubes forming in a freezer.
Ice cream melting in a bowl.
A cake baking in an oven.
In a beaker, sugar is dissolved in water, and then the water is heated and evaporates. The sugar is recovered from the beaker and heated again. Gas is released and the material in the beaker changes from white to black. What must you know to determine if a chemical change occurred?
The boiling temperature of the water.
The boiling temperature of the sugar.
The temperature at which sugar evaporates.
Whether or not the black substance is still sugar or something new.
In making a pizza, which process involves a chemical change?
Mixing spices for the sauce
Slicing pepperoni for the topping
Spreading cheese on the pizza
Baking the dough to form the crust
Josi investigated chemical and physical changes using eggs. She did the following four actions to four different eggs: Boiled, Cracked, Fried, Scrambled
Which action describes a physical change?
Boiled
Cracked
Fried
Scrambled
A student is asked to conduct an investigation that will determine a physical property of a cube-shaped solid block of salt sample. Which procedure BEST measures a physical property of the sample?
1. Measure 10 mL of vinegar (acetic acid) in a graduated cylinder.
2. Pour the acetic acid into a beaker.
3. Drop the sample into the beaker of acetic acid to determine what happened to the sample.
1. Gently break the solid sample into smaller pieces using a hammer.
2. Use long-handled forceps to pick up one of the small sample pieces.
3. Hold the small sample piece in the flame of a Bunsen burner for a few seconds to determine what happens to the sample.
1. Use a ruler to measure the length of one side of the sample in millimeters.
2. Cube the value in step 2.
3. Place the cubed sample on the digital scale and record to the nearest gram.
4. Divide the value mass by the volume.
1. Cut away two different sized pieces of the sample and place each into a different container on a hot plate.
2. Place thermometers in each.
3. Record the time it takes the temperature to raise 1 degree C for each container.
4. Subtract the value of the smaller sample from the larger sample.
Which statement supports the answer to Part A in question #21?
The physical property being tested is density; the procedure selected measures the mass and the volume of the sample.
The physical property being tested is reactivity; the procedure selected determines whether the sample will change to a different substance due to mixing with acetic acid.
The physical property being tested is melting point; the procedure selected measures the temperature at which the sample changes to a liquid.
The physical property being tested is combustibility; the procedure selected determines whether the sample will begin to burn due to exposure to a flame.
Which subatomic particle(s) are found in the nucleus of the atom? Choose all that apply.
proton
neutron
electron
How many neutrons are in Gold
118
79
197
276
Which of these is NOT a property of metals?
Metals are malleable.
Metals are poor conductors of electricity
Metals are ductile.
Metals are brittle.
Which element is located in Group 11 & Period 4?
Vanadium
Cadmium
Copper
Rhodium
What element is located in Group 18 & Period 5?
Xenon
Krypton
Radon
Helium
Which element is located in Group 5 & Period 4?
Nitrogen
Phosphorus
Antimony
Vandium
periods on the periodic table tell you
the number of valence electrons
the number of protons
the number of energy levels
the total number of subatomic particles in the element
groups on the periodic table tell you
the number of energy levels (rings)
the number of protons
the elements identity
the number of valence electrons
what period would this element be in?
6
8
3
16
what group number would this element be in?
8
3
18
7
UP and DOWN columns on the periodic table are
groups
periods
As you move left to right on a row or period what happens?
Atomic number increases by 1
Electrons decrease
Number of shells decrease
Nothing
What happens to the number of shells as you move down a group?
They decrease by 1
They increase by 1
Nothing
Which group of the periodic table is composed of inert (not reactive) gases?
alkali metals
halogens
alkaline earth metals
noble gases
Which is an alkali metal?
Magnesium
Sodium
Iron
Europium
Which is a halogen?
Helium
Oxygen
Chlorine
Neptune
How many energy levels would Silicon have?
14
4
3
2
How many valence electrons does Fluorine have?
17
7
2
9
Which of the following illustrations represents a pure substance?
Sulfur (S), Oxygen ( O2 ), water ( H2O ) and sodium chloride (NaCl) are all examples of pure substances. Which of the following describes ALL pure substances?
A pure substance consists of only one type of element.
A pure substance has a definite chemical composition.
A pure substance cannot be broken down into simpler substances.
A pure substance is normally found as a solid at room temperature.
Which of the following is an example of a container that is filled with a pure substance rather than with a mixture?
a tire filled with air
a jar filled with salt water
a balloon filled with helium
a glass filled with chocolate milk
In the following diagrams, the spheres represent particles. Different shadings represent different particles. Which of the following contains only one pure substance?
Which of the following models correctly represents the compound phosphorus trichloride ( PCl3 )
How many different ELEMENTS are in the compound sodium carbonate Na2CO3 ?
1
3
6
7
Andy wants to study a compound in his science class. Which of these is a compound?
salt
iron
helium
hydrogen
Which of the following is formed when two elements combine chemically?
an atom
a compound
an electron
a mixture
The diagram here shows the chemical structure of water. What can be concluded about the structure of water?
It is an ATOM made up of two elements.
It is an ATOM made up of three elements.
It is a MOLECULE made up of two elements.
It is a MOLECULE made up of three elements.
Sugar is composed of carbon, hydrogen, and oxygen. Sugar is an example of which of the following?
an atom
a compound
an electron
a mixture
The circles and dots in the boxes here represent atoms of two different elements. Atoms touching each other are considered bonded to each other. Which box contains a mixture?
Box A
Box B
Box C
Box D
Carlos was asked to bring an example of a mixture to class. Which of these should Carlos bring as his example?
salt
sugar
salt water
cold water
An example of a heterogeneous mixture is
soil
sugar
carbon monoxide
carbon dioxide
When sugar is dissolved in water, the resulting solution is classified as a
homogeneous mixture
heterogeneous mixture
homogeneous compound
heterogeneous compound
Given the diagrams X, Y and Z: Which diagram or diagrams represent a mixture of elements A and B?
X only
Z only
X and Y
X and Z
Which of these is an example of a homogeneous mixture?
M&M's
chocolate chip cookies
salad
tap/faucet water
Which of the following is an example of a heterogeneous mixture?
Salt Water
Kool-Aid
Salad
Tomato Soup
These diagrams show three examples of matter. Which list correctly describes the matter in each picture?
X = mixture,
Y = element,
Z = compound
X = element,
Y = mixture,
Z = compound
X = compound,
Y = element,
Z = mixture
X = element,
Y = compound,
Z = mixture
The diagram shows three examples of matter. Which list correctly describes the matter in each picture?
D = Compound
E = Element
F = Mixture
D = Mixture
E = Element
F = Compound
D = Compound
E = Mixture
F = Element
D = Element
E = Mixture
F = Compound
The diagrams show three containers of gas. Which list correctly describes the gases in containers R, S and T?
R = element,
S = compound,
T = mixture
R = compound,
S = element,
T = mixture
R = element,
S = mixture,
T = compound
R = mixture,
S = element,
T = compound
The reaction of element X ( the black boxes ) with element Y ( the white circles ) is represented in the following diagram: Which equation properly describes the reaction between X and Y?
3X + 8Y -> X3Y8
3X + 6Y-> X3Y6
X + 2Y -> XY2
3X + 8Y -> 3XY2 + 2Y
Why does a balanced chemical equation support the Law of Conservation of Mass?
Because the total mass of the products is greater than the mass of the reactants
Because the total mass of the reactants is less than the mass of the products
Because the total mass of the reactants equals the total mass of the products
Which remains the same during a chemical reaction?
The temperature of the elements
The total number of atoms
The total number of compounds
Which of the following equations represents the law of conservation of mass?
H2O -> H2 + O2
2H + 2O -> 2H2O
2H2O -> 2H2 + O2
H2 + O2 -> H2O + H2O2
A chemical reaction is represented by this equation.
2Fe2O3 -> 4Fe + 3O2
What is a product of this chemical reaction?
FeO
F
O2
Fe2O3
Which of the following equations represents the law of conservation of mass?
Na + 2Cl2 -> 2NaCl
2Na + Cl2 -> 2NaCl
4Na + 2Cl2 -> 3NaCl
2Na + 2Cl2 -> 4NaCl
Which equation is the correctly balanced chemical equation for this reaction?
HgO -> Hg + 2O2
2HgO -> Hg + O2
2HgO -> 2Hg + O2
2HgO -> Hg + 2O2
The balanced equation below represents the reaction of NaOH with H3PO4.
NaOH + H3PO4 -> NaH2PO4 + H2O
When 20g of NaOH reacts with 49g of H3PO4, 9g of water is produced. How many grams of NaH2PO3 are produced?
11g
60g
69g
78g
The white pigment in many paints is titanium dioxide (TiO2). It is made by burning titanium chloride. The other product in this reaction is chlorine gas. What is the balanced equation for this reaction?
TiCl4 + O2 -> TiO2 + 2Cl2
2TiCl4 + O2 -> TiO2 + 4Cl
TiCl4 + 2O2 -> 2TiO2 + Cl2
2TiCl4 + 2O2 -> 2TiO2 + Cl4
A chemical reaction produces two new substances, and each product has a mass of 25 grams. What was the total mass of the reactants?
25g
5g
50g
100g
In the equation below, 46 grams of sodium (Na) reacted with 36 grams of water (H2O). If 2 grams of hydrogen gas (H2) is produced by this reaction, what is the mass of sodium hydroxide (NaOH) produced?
2Na + 2H2O -> 2NaOH + H2
10 grams
44 grams
80 grams
82 grams
The reaction below shows potassium oxide being produced (KO2) by combining oxygen (O2) with potassium (K). The mass of potassium is 50 grams and the mass of they oxygen is 12 grams. What is the mass for the potassium oxide that was produced?
O2 + K -> KO2
160 grams
62 grams
50 grams
12 grams
A student observes a chemical reaction in which aluminum (Al) reacts with Oxygen (O2) to produce aluminum oxide (Al2O3). Which equation below is the balanced equation for this chemical reaction?
2Al + 3O3 -> 2Al2O3
4Al + 2O2 -> 3 Al2O3
Al + O2 -> Al2O3
4Al + 3O2 -> 2Al2O3
A chemical equation is shown below. Which substance is a reactant?
2H2O -> 2H2 + O2
Oxygen(O2)
Water (H2O)
Hydrogen (H2)
A chemical reaction is shown below. Which of the following choices is the product of this chemical reaction? Select all that apply.
2H2O -> 2H2 + O2
Oxygen(O2)
Water (H2O)
Hydrogen (H2)
According to the Law of Conservation of Mass, in a balanced chemical equation, the mass of the reactants is equal to the:
Atoms in a molecule.
Volume of the reactants.
Atomic mass of the elements.
Mass of the products.
Each circle shown represents a different atom.
Which diagram illustrates that matter is always conserved during a chemical reaction?
Which model demonstrates the Law of Conservation of Matter?
Students were asked to balance the equation below. Evaluate their responses in the picture. Choose the correct answer.
Original Equation: Zn + HCl -> ZnCl2 + H2
All of the students are correct because there are the same number of Zn, H, and Cl atoms on both sides of the equations.
Student A is correct because he used the correct subscripts to have the same number of Zn, H, and Cl atoms on both sides of the equation.
Student B is incorrect because he used the coefficient to have the same number of Zn, H, and Cl atoms on both sides of the equations.
Student C is incorrect because he changed the subscripts to have the same number of Zn, H, and Cl atoms on both sides of the equations.
A student observes a chemical reaction.
Aluminum (Al) + Oxygen (O) -> Aluminum Oxide (Al2O3)
She writes an equation that correctly displays the law of conservation of mass.
Select the balanced equation below that she wrote about this chemical reaction.
2Al+3O3 −> 2Al2O3
4Al+2O2 −>3Al2O3
Al+O2 −>Al2O3
4Al+3O2 −>2Al2O3
This is an image of a magnet showing the magnetic field.
Where is the magnetic force the strongest?
Position A
Position B
Position C
Position D
Joe has an idea to cut a bar magnet in half so that he can have one magnet with a north pole and one magnet with a south pole. What is wrong with this idea?
It is impossible to cut a magnet in half.
It is impossible to create an extremely small magnet.
It is impossible to create a magnet with only one magnetic pole.
It is impossible to separate two opposite magnetic poles once they are in contact with each other.
Which of the following best describes a magnetic field?
measure of the length of a magnet
the force that pushes two magnets away from each other
an invisible region that surrounds the north pole of a magnet
a region around a magnet in which you can measure magnetic forces
The picture below shows magnet 2 being pushed toward magnet 1. Which of the following will most likely happen to magnet 1 as magnet 2 is moved closer?
Magnet 1 will move under magnet 2.
Magnet 1 will move toward magnet 2.
Magnet 1 will move on top of magnet 2.
Magnet 1 will move away from magnet 2.
Use the image to answer this question. What generalization can you make about the attraction between the magnets on the left?
They are polarized.
They are attracted to each other.
They are electrically charged.
They are repelling each other.
Look at the diagram of the bar magnets. What will happen to the force between the two magnets if they are pulled further apart?
The force would be weaker.
The force would be stronger.
The force would stay unchanged.
The force would reverse the poles.
Iron filings and bar magnets were placed on a sheet of paper. The following diagram shows the pattern made on the paper. At which location is the magnetic field the strongest?
1
2
3
4
What is the name of the attractive force that acts between any two bodies (objects) in our universe?
Gravitational force
Coulomb attractive force
Magnetic force
Electrical force
Two factors affecting the size of the force of gravity between 2 objects are
Mass and matter
Distance and weight
Mass and distance
Weight and mass
The farther apart two objects are, the ____ their gravitational forces.
stronger
weaker
more equal
When placed at equal distances apart, the greatest gravitational attraction will be between two
skateboards
bowling balls
school buses
marbles
Two objects have a certain gravitational force between them. What would happen if the mass of one of the objects suddenly increased?
The mass of the other object would increase.
The distance between the objects would increase.
The gravitational force of the objects would remain constant.
The gravitational force between the two objects would increase.
The objects shown in the following diagrams have different masses and are different distances apart. Which diagram shows the two objects that have the greatest gravitational force between them?
When Bethany walks across a carpet, her socks pick up many negative electric charges. Later in the day, these negative charges are no longer present on her socks. What most likely happened to the negative charges?
The charges disappeared.
The charges transferred to another object.
The charges switched from negative to positive.
The charges broke apart into smaller positive and negative particles.
This image shows two circular objects. Each object has an electric charge, as shown. What will happen to these objects when they are placed near each other?
The objects will remain still.
The objects will both move to the left.
The objects will move towards each other.
The objects will move away from each other.
Each diagram shows two pith balls (foam balls coated with aluminum) hanging from strings. A pith ball can be given a positive (+) or a negative (-) electrical charge. Which of the following diagrams shows a correct way in which the charged balls will be attracted to or repelled by each other?
A balloon is rubbed with a piece of cloth. As a result, the balloon has a negative charge. What has happened?
Electrons have moved from the inside to the outside of the balloon.
Positive charges have traveled from the balloon to the cloth.
Electrons have moved from the balloon to the cloth.
Electrons have traveled from the cloth to the balloon.
A charged object (A) comes into contact with an uncharged object (B). In the process, object A loses electrons and object B gains electrons. Which of the following is true?
Object B lost protons.
Object B now has no charge.
Object B now has a positive charge
Object B now has a negative charge.
A balloon has a negative charge. A glass rod has a positive charge, as shown below. What will happen when the glass rod is brought near the balloon?
The balloon will be attracted to the rod.
The balloon will be repelled by the rod.
The balloon will remain in place.
The balloon will spin in circles.
In this picture, how is electric charge being transferred?
Charged by conduction
Charged by friction
Charged by induction
Charged by transduction
In this picture, how is electric charge being transferred?
Charged by conduction
Charged by friction
Charged by induction
Charged by transduction
Objects can be charged in many ways. In the image, a student is rubbing a balloon on his head. What method is he using to charge the balloon?
Friction
Induction
Repulsion
Conduction
Two electrically charged objects come into contact with each other. When they touch, electrons transfer from the more negative object to the less negative object until they both have the same charge. What type of static charge transfer is happening in this scenario?
friction
induction
repulsion
conduction
Peter’s teacher tells him that he should not place his electric stereo near the edge of a pool because the water in the pool is a conductor. What does she mean when she says that the water is a conductor?
Water is a type of electrical energy.
Water damages electric circuits.
Electric charges cannot flow without water.
Electric charges move through the water in the pool.
Some of the materials for a laboratory experiment are copper wire, plastic tubing, and a pair of cotton gloves. Why is the copper wire the best electrical conductor in this group of materials?
Copper wire is easy to bend.
Copper wire resists the flow of charged particles.
Copper wire can withstand very high temperatures.
Copper wire allows electric charges to flow easily through it.
How are electromagnets different from magnets?
Magnets can be turned on/off
Magnets are more powerful
You can turn an electromagnet on/off
What would increase the strength of an electromagnet?
Increasing the amount of current flowing through the wire
Changing the direction of the current
Inserting a wooden core inside
Decreasing the numbers of coils of wire
The distance between two charges is represented by d. In which of the following diagrams is the attractive force between the two charges the greatest?
The diagram shows four charged objects: A, B, C, and D. Based on the diagram, which statement is true?
The electric force between A and B is identical in magnitude (size) to the electric force between C and D.
The electric force between A and B is greater than the electric force between C and D.
The electric force between A and B is smaller than the electric force between C and D.
The electric force between A and B is canceled by the electric force between C and D.
The interaction between electricity and magnetism has been an important topic in 20th century science. Which term describes this interaction?
Electromagnetism
Ferromagnetic
Magnetic field
Static electricity
Daniel has a long piece of copper wire. He shapes the wire into a coil. What could Daniel do to cause electric current to flow through the wire?
shake the wire very quickly
submerge the wire into a pan of hot water
move a bar magnet in and out of the wire coil
connect the two free ends of the wire to a power source so that they form a closed path.
The picture below shows a generator used to produce electricity. Electricity is produced in a generator by changing _____________ energy into __________________ energy.
Mechanical; Electrical
Electrical; Mechanical
Steam; Light
Magnetic; Mechanical
The picture is a diagram of a simple electric motor. Electricity is produced in a motor by changing _________________ energy into _____________ energy.
Mechanical; Electrical
Electrical; Mechanical
Steam; Light
Magnetic; Mechanical
Which of the following electromagnets would have the greatest magnetic field?
