WorksheetsFinal Exam Second Semester Physical Science
Total questions: 100
Worksheet time: 8hrs 7mins
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.
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
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?
Which of these is the smallest particle that still has all the properties of an element?
an atom
a proton
a molecule
an electron
An atom of lead has the atomic number 82 and a mass number of 207. How many neutrons does this atom of lead have?
82
125
207
289
Which of the analogies best describes a Bohr model of an atom?
A Bohr model is like a bowling ball because they are both solid spheres.
A Bohr model is like a model of the solar system because they both show orbits around a massive center.
A Bohr model is like a string of beads because they both contain small parts that are lined up in a row.
A Bohr model is like a jigsaw puzzle because they are both made of small parts that are all joined together.
What subatomic particles are located in the nucleus of an atom?
both electrons and isotopes
both neutrons and isotopes
both neutrons and electrons
both protons and neutrons
A sodium atom, which has 11 electrons, will have ____ electron(s) in its third energy level.
2
8
1
18
An iron atom has an atomic mass of 56. Its atomic number is 26. This means an atom of iron has _____ protons and ____ neutrons.
26; 56
26; 26
26; 30
30; 26
The periodic table has a lot of information in the form of letters and numbers. The information is organized into boxes, which are placed in rows and stacked in columns. Which of the following does each box represent?
a group
a period
an element
a compound
In this periodic table, find the element with the average atomic mass of 87.62. What is the chemical symbol for this element?
Rb
Sc
Sr
Y
Which describes how elements are arranged in the periodic table?
by chemical symbol
by decreasing atomic mass
by increasing atomic number
by alphabetical order of name
The periodic table of the elements is divided by a line that zigzags along the right side. Which of the following is true for most of the elements that lie along the zigzag line?
They are metals.
They are metalloids.
They are nonmetals.
They are transition metals.
Which is true about the position of all metals in the periodic table?
They are in the first group.
They are in the bottom period.
They are in the rightmost column.
They are to the left of the zigzag line.
Which property most likely belongs to a nonmetal?
They are gases at room temperature.
They are malleable.
They are shiny.
They are good conductors.
Which properties most likely belong to a metal?
brittle and dull
liquid and clear
ductile and malleable
gaseous and unreactive
Metals can be drawn/made into a wire. The vocabulary word for this property is _____.
conductive
malleable
magnetic
ductile
_____________ describes how well/easily a substance can be pounded/hammered into a new shape without breaking.
Conductivity
Malleability
Ductility
Luster
What do elements in the same group on the periodic table have in common?
They have the same atomic number.
They have similar chemical symbols.
They have similar chemical properties because they have the same number of valence electrons.
They have the same average atomic mass.
Nitrogen has one more valence electron than carbon has. What can you infer about nitrogen's location on the periodic table?
Nitrogen is in the first group.
Nitrogen and carbon are in different groups.
Nitrogen is directly above carbon but within the same group.
Nitrogen is directly below carbon but within the same group.
Which of the following elements is an alkali metal?
magnesium
mercury
sodium
calcium
This segment of the periodic table shows the elements in Groups 1 though 9. Which pair of elements are in the same group?
Rb and Cs
Ca and Ti
Li and Be
Na and Mg
Which of the following elements is an alkaline earth metal?
magnesium
fluorine
nitrogen
lithium
Which of the following elements is a noble gas?
calcium
argon
fluorine
hydrogen
Elements that belong to the same group have the same number of
neutral electrons.
valence electrons.
total electrons.
inner electrons.
Which statement about the alkali metals is CORRECT?
They are extremely non-reactive.
They are located in the left-most column of the periodic table.
They are usually gases.
They are located in the second column of the periodic table.
Which element is least reactive?
argon
calcium
nitrogen
sodium
Choose all statements about noble gases that are CORRECT? Choose all that apply. There is more than one answer.
A. They belong to Group 18
B. They are nonmetals.
C. They exist as single atoms because their outer energy levels are full.
D. They all have 7 valence electrons.
Statement A & B are correct.
Statement A, B and C are correct.
Statement A and D are correct.
Statement B, C and D are correct.
The elements in a column of the periodic table
are in the same family.
are in the same period.
have the same atomic mass.
have the same chemical symbols.
Across a period of eight elements in the periodic table, the number of valence electrons
is the same for all eight elements.
is equal to the period's number.
depends on the atomic numbers of the elements.
increases from 1 to 8.
What element is in group 2, period 4?
C
As
Ca
Ba
Which element is in group 7, period 5?
Xe
Tl
Db
Tc
Which two elements are in the same group?
V and Cr
Kr and Xe
Cs and Ba
K and Ne
Which two elements are in the same period?
Cl and Br
Tl and Ga
K and Ca
H and Be
Which of these element pairs has the same number of valence electrons?
N and P
Cl and P
H and Be
K and Ca
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
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
Which statement is a chemical change?
Cutting hair short for the summer.
Digesting fruit snacks.
A swimsuit drying in the sun.
Painting toenails red.
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
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
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
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)
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.
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
Which of the following models correctly represents the compound phosphorus trichloride ( PCl3 )
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
Which of the following is formed when two elements combine chemically?
an atom
a compound
an electron
a mixture
_____ is an example of a homogeneous mixture.
M&M's
Chocolate chip cookies
Salad
Tap/Faucet Water
An example of a heterogeneous mixture is
salt water
Kool-aid
salad
tomato soup
When sugar is dissolved in water, the resulting solution is classified as a
homogeneous mixture
heterogeneous mixture
homogeneous compound
heterogeneous compound
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 = element
E = compound
F = mixture
D = compound
E = mixture
F = element
D = element
E = mixture
F = compound
