WorksheetsFinal Exam Review
Total questions: 261
Worksheet time: 5hrs 52mins
A man jogs at a velocity of 2.5 m/s west for 1,200 s. He then walks at a velocity of 1.0 m/s east for 500 s and then stops to rest. What is the displacement of the man when he stops to rest?
3,500 m west
3,000 m west
2,500 m west
700 m west
The graph below shows the motion of four cars. Based on the graph, which statement about all the cars is true?
They are moving at a constant speed.
They are changing their speed during travel.
They are slowing down.
They are stopped.
A rock on Earth has a mass of 750 kg and a weight of 7,350 N. If the rock is taken into outer space, how will its mass and weight be affected?
The weight and mass will remain the same because they are not altered by the effects of gravity.
The weight will remain the same, but the mass will change because of the effects of gravity.
The mass will be 76.5 kg, and the weight will increase because of the effects of gravity.
The mass will be 750 kg, but the weight will decrease because of the effects of gravity.
As the wheels of a train move along the train tracks, what type of friction exists between the wheels and the tracks?
fluid friction
rolling friction
sliding friction
static friction
A 1,500-kg truck has a net force of 4,200 N acting on it. What is the truck’s acceleration?
6,300,000 m/s/s
2,700 m/s/s
2.8 m/s/s
0.36 m/s/s
A child fills a bucket with salt water and sand. How are the contents of the bucket classified?
a solution
a compound
a homogeneous mixture
a heterogeneous mixture
This diagram shows a 40-kg object being pulled in one direction while friction acts on it in the opposite direction. What is the net force on the object?
160 N
140 N
120 N
20 N
How are the processes of melting and freezing similar?
They are both processes that physically change a substance.
They are both processes that chemically change a substance.
They are both processes where heat is released by a substance.
They are both processes where heat is absorbed by a substance.
Which element is classified as a metal?
boron (B)
antimony (Sb)
phosphorus (P)
cadmium (Cd)
Four different liquids will be separately poured into a single beaker. The liquids are ethanol, milk, oil, and water. The density for each liquid at room temperature is listed in the table below. How will the liquids be arranged from bottom to top in the beaker?
milk, water, oil, ethanol
milk, water, ethanol, oil
water, milk, oil, ethanol
water, oil, ethanol, milk
The diagram below is the Bohr model of an atom. Which best describes this atom?
It has 6 electrons.
It has a positive charge.
It has 6 valence electrons.
It has a full outermost energy level.
How does a piece of paper’s ability to be folded in half compare to its ability to burn?
Its ability to be folded is a physical property, while its ability to burn is a chemical property.
Its ability to be folded is a chemical property, while its ability to burn is a physical property.
Both are physical properties of the piece of paper.
Both are chemical properties of the piece of paper.
How many valence electrons are in a neutral atom of nitrogen (N)?
2
3
5
15
Electrons are being shared between atoms in a certain compound. Which elements could most likely form this compound?
lithium (Li) and fluorine (F)
aluminum (Al) and iodine (I)
sulfur (S) and oxygen (O)
iron (Fe) and chlorine (Cl)
What is the chemical formula for magnesium acetate?
Mg2(C2H3O2)2
Mg(C2H3O2)2
Mg2C4H6O4
MgC4H6O4
Which represents a balanced chemical equation?
CO2 + 2H2O → 2CH4 + 2O2
CH4 + O2 → CO2 + H2O
CH4 + 2O2 → CO2 + 2H2O
CO2 + H2O → CH4 + O2
What type of chemical reaction occurs when beryllium (Be) combines with oxygen (O2) to form beryllium oxide (BeO)?
double replacement
single replacement
decomposition
synthesis
Which equation represents a neutralization reaction?
acid + water → salt + base
acid + base → water + salt
acid + salt → base + water
water + base → salt + acid
Which of these elements is the most chemically reactive?
beryllium (Be)
calcium (Ca)
strontium (Sr)
radium (Ra)
Which compound contains ionic bonds?
C2H6
PCl5
Ca3N2
SF2
This unbalanced equation represents a chemical reaction: Pb(NO3)2 + NaI → NaNO3 + PbI2. What is the coefficient for NaI once the equation is balanced?
1
2
3
4
What type of bond will form when an element from group 2 (IIA) bonds with an element from group 17 (VIIA)?
hydrogen bond
covalent bond
metallic bond
ionic bond
This chart shows the effects of several solutions on litmus paper. Which information can be determined from the litmus paper tests?
Solutions 1 and 5 are both acids.
Solutions 2 and 8 are both neutral.
Solutions 3 and 6 are both bases.
Solutions 4 and 7 are both acids.
A 100-gram sample of cerium-143 has a half-life of 33 hours. How long will it take until there are only 6.25 grams of cerium-143 left?
66 hours
99 hours
132 hours
165 hours
The chart below lists the specific heat capacity of four different metals of equal mass. If the temperature of each metal were increased from 20°C to 25°C, which metal would require the least amount of heat to raise its temperature?
copper
gold
nickel
titanium
1. What is the charge on a neutron?
a. positive
b. negative
c. neutral
d. It depends on the element.
2. What is the atomic number of silicon?
a. 14
b. 28.1
c. 16
d. 32.1
3. How many electrons are in a neutral atom of nitrogen?
a. 14.007
b. 21
c. 21.007
d. 7
4. All of the following are halogens EXCEPT....
a. iodine.
b. helium.
c. fluorine.
d. bromine.
5. Only one of the following elements is an alkaline earth metal. Which one is it?
a. Potassium
b. Calcium
c. Tungsten
d. Silver
6. The material that DOES THE DISSOLVING in a solution is...
a. the solvent.
b. always a solid.
c. the solute.
d. always an ionic compound.
7. A paper clip attaches to a magnet, but they don't react with each other. This is an example of....
a. a chemical property.
b. a polarized property.
c. an ionic property.
d. a physical property.
8. When liquid water is combined with solid baking powder, carbon dioxide gas is produced. This is an example of .....
a. a polarized property.
b. a physical property.
c. a chemical property.
d. a cationic property.
9. A solution in which particles are evenly spread apart is ...
a. a heterogeneous solution.
b. a homogeneous solution.
c. a nonpolarized solution.
d. an ionic solution.
10. An object has a volume of 30 mL and a density of 3 grams / mL. What is the mass of this object?
a. 10 grams
b. 90 grams
c. 27 grams
d. 33 grams
11. What is the formula for sodium fluoride?
a. SF
b. SaFl
c. NaF
d. NaFl
12. How many valence electrons does nitrogen have?
a. 7
b. 5
c. 14
d. 2
13. What is the name of the compound with the formula Mg(OH)2?
a. Magnesium hydroxide
b. Magnesium oxygen hydrogen
c. Sodium hydride
d. Manganese oxide
14. What is the name of the compound that has the formula P2O5?
a. diphosphorus pentoxide
b. phosphorus oxide
c. phosphorus tetroxide
d. diphosphorous oxide
15. Which of the following statements is true of a cation?
a. Cations form from metals.
b. Cations form when atoms lose electrons.
c. Cations have positive charges.
d. All of the above statements are true.
16. What does the law of conservation of mass state?
a. Energy isn't created or destroyed in a chemical reaction.
b. Chemical reactions can create mass.
c. Chemical reactions can destroy mass.
d. Mass isn't created or destroyed in a chemical reactions.
17. What coefficients balance the following equation:
CH4 + O2 --> CO2 + H2O
a. 3 , 2 , 3 , 2
b. 2 , 1 , 2 ,1
c. 1 , 2 , 1 , 2
d. 2 , 2 , 2 , 2
18. Classify the following reaction:
P4O10 + H2O --> H3PO4
a. Decomposition
b. Single replacement
c. Synthesis
d. Double replacement
19. What scientist gets credit for discovering the law of conservation of mass?
a. J.J. Thomson
b. Antoine Lavoisier
c. James Clerk Maxwell
d. Ernest Rutherford
20. Classify and balance the following chemical equation:
HCl + Ca(OH)2 --> CaCl2 + H2O
a. Double replacement ; 2 , 1 , 1 , 2
b. Double replacement ; 1 , 2 , 2 , 1
c. Single replacement ; 2 , 1 , 1 , 2
d. Single replacement ; 1 , 2 , 2 , 1
Total distance an object travels with direction.
Displacement
Distance
Path
Velocity
What is the correct unit for distance?
m or km
d or kd
s
N
What is the correct unit for velocity?
m/s2
mi/hr
d/t
m/s
What is the correct unit for acceleration in kinematics?
m/s
m/min2
m/s/t
m/s2
An airplane accelerates down a runway at 3.20 m/s2 for 8 s until it finally lifts off the ground.
Determine the velocity at take-off.
A hummingbird averages a speed of about 45 km/hour. Ruby-throated hummingbirds take a non-stop trip across Gulf of Mexico in which they fly for 18 hours straight! How far is the trip across the Gulf of Mexico at their average speed?
Who wins the tug of war in this picture?
The person on the left will win
The people on the right will win
What is the unit used when measuring force?
Kilogram
Meter
Pounds
Newton
A ____________ is a push or a pull on an object.
friction
force
magnet
gravity
Are the forces in the picture:
Balanced
Unbalanced
________ forces cause objects to move from their original positions.
Net forces
The forces in the picture are applied to the box. Which direction will the box move?
To the left ( <-- )
To the right ( --> )
This type of force between 2 surfaces rubbing on each other is _________.
magnetism
tension
Damon was testing the amount of time leaves take to fall to the ground after being tossed up into the air. What force made the leaves fall to the ground?
Seasons
Friction
Magnetism
Gravity
Which of Newton's laws states that an object in motion tends to stay in motion and an object at rest tends to stay at rest until acted on by an unbalanced force?
1st
2nd
3rd
4th
Which of Newton's Laws is: For every action there is an equal and opposite reaction?
1st
2nd
3rd
4th
What is the net force?
400
800
200
600
Calculate the net force
25
65
20
15
If you are pushing a 1200 kg car with an acceleration of 0.5 m/s2 , what is the force you have applied to the car?
600
2400
4.16
60
calculate the force applied to a 5 kg shopping cart if it accelerates at 3 m/s2
15
1.67
0.6
1.57
If I use fertilizer, then my plant will grow faster because the fertilizer will provide nutrients to the plant. Identify the correct step from the choices below.
ask a question
form a hypothesis
design an experiment
collect the data
analyze and interpret the data
You publish an experiment in a scientific journal. What step of the scientific method is this?
ask a question
form a hypothesis
collect the data
communicate findings
analyze and interpret data
The dependent variable is the variable that is _____
being measured
When doing an experiment, which variable are you going to change?
What is the atomic number of an element that has 6 protons and 6 neutrons?
18
12
24
6
What is the half-life of a substance if 25% of the original sample remains after 20 minutes?
20 minutes
10 minutes
40 minutes
30 minutes
What is the electron configuration of carbon?
1s2 2s1 2p3
1s2 2s2 2p2
1s2 2s2 2p3
1s2 2s1 2p2
How many valence electrons does an atom of chlorine have?
2
10
7
5
In a nuclear reaction, what is the process called when a heavy nucleus splits into two or more lighter nuclei?
nuclear division
atomic disintegration
nuclear fission
nuclear fusion
What is the balanced chemical equation for the reaction between hydrogen and oxygen to form water?
2H2 + O2 -> 2H2O
H2 + O2 -> H2O
2H + O -> H2O
H2O -> 2H2 + O2
What type of chemical reaction is represented by the following equation: 2H2 + O2 → 2H2O
Single displacement reaction
Combustion reaction
Decomposition reaction
Synthesis reaction
What is the atomic number?
the number of protons in the nucleus
the number of protons and neutrons in the nucleus
the number of neutrons in the nucleus
the number of protons in the energy levels
What is the mass number?
the number of protons in the nucleus
the number of protons and neutrons in the nucleus
the number of neutrons in the nucleus
the number of protons and electrons in the atom
What is the atomic number of this atom?
1
3
4
7
What is the mass number of this atom?
1
3
4
7
Knowledge Check:
Why does Sodium become a +1 charge?
Sodium gives away 1 e-, so it now has 1 less negative (-) charge.
Sodium accepts 1 e-, so it now has 1 more negative (-) charge.
Is identical to a helium nucleus
Electromagnetic Waves
Beta Particle
Gamma Photons
Alpha Particle
finish the equation
22688Ra --> ____ + 22688Ra
42He
0-1e
y
Identify the type of nuclear decay shown here
21483Bi → 0-1e + 21484Po
alpha
beta
gamma
Solve this equation.
85209At = ___ + 24He
83205Bi
86209Rn
81207Tl
85208At
How many HCl molecules do you need to balance this equation?
2Mg + (a) HCl ---> 2MgCl2 + 2H2
What coefficient should be used to make the following equation balanced?
N2+O2--> __?__NO
1
2
3
4
Is the following equation balanced?
Al + O2 ---> 2Al2O3
YES
NO
What type of reaction is the following:
C11H24+17O2−> 11CO2 + 12H2O
Combination
Decomposition
Single Replacement
Double Replacement
Combustion
How many protons, neutrons, and electrons are in a lithium atom?
3 protons, 3 electrons, and 4 neutrons
3 protons, 4 electrons, and 3 neutrons
3 protons, 3 electrons, and 3 neutrons
4 protons, 3 electrons, and 4 neutrons
Which element has chemical properties most similar to that of potassium (K)?
Ca
Na
C
Ba
In a covalent bond, electrons are...
shared
transferred
always split between two atoms
lost
In an ionic bond, electrons are...
shared
transferred
always split between two atoms
lost
Which of the following combinations will produce the largest current?
120 V and 12 Ohms
150 V and 10 Ohms
100 V and 25 Ohms
180 V and 90 Ohms
What is true for the chemical reaction shown?
It is balanced because the mass of the reactants is equal to the mass of the products.
It is unbalanced because the mass of the reactants is greater than the mass of the products.
It is unbalanced because the mass of the reactants is less than the mass of the products.
It is balanced because the number of reactants is equal to the number of products.
What coefficients will correctly balance the equation shown?
1, 2, 2
2, 2, 2
2, 3, 2
3, 2, 3
The half-life of Phosphorous-32 is 14.3 days. What fraction of a 100 g sample would be left after 42.9 days?
1/2
1/4
1/8
1/16
A saturated solution...
can accept additional solvent to be dissolved in the solute
can accept additional solute to be dissolved in the solvent
has the maximum amount of solvent that can be dissolved in the solute
has the maximum amount of solute that can be dissolved in the solvent
Which combination below will create the fastest chemical reaction?
a block of baking soda and vinegar at 20 degrees Celsius.
powdered baking soda and vinegar at 50 degrees Celsius.
a block of baking soda and vinegar at 50 degrees Celsius.
powdered baking soda and vinegar at 20 degrees Celsius.
In a fission reaction...
lighter nuclei combine to form heavier nuclei
heavier nuclei split to form lighter nuclei
energy is released resulting in unstable elements
energy is absorbed resulting in stable elements.
A series circuit has..
a single current path
multiple current paths
a greater voltage than current
a greater current than voltage
Based on the graph, how much NaNO3 dissolves at 10 degrees Celsius?
0 g
40 g
65 g
80 g
Acids are...
slippery
bitter
any pH higher than 7
able to turn litmus red
Which substance is the most basic?
bleach with a pH equal to 13.0
ocean water with a pH of 8.0
ammonia with a pH of 9
hydrochloric acid with a pH of 2
Jada made an electromagnet. Which choice below would NOT help make it stronger?
use an iron metal core
increase the current flowing through the wire
increase the number of coils of copper wire
change the direction of current flowing through the electromagnet
The reactivity of an atom is determined by
its number of valence electrons
the protons found in the outer shell
the number of protons and neutrons in a nucleus
the number of electrons and protons in its nucleus
A light bulb has a resistance of 9 ohms when it is attached to an 18V battery. What is the current in the circuit?
2 Amps
2 Volts
162 Amps
162 Volts
Nuclear waste from fission reactions has a very long half life. This is a ________________ of nuclear fission reactions.
advantage
disadvantage
A large amount of energy can be produced from the fission of a small amount of uranium. This is considered a __________________ of nuclear fission.
advantage
diadvantage
Ionic compounds have ____________ melting points and covalent compounds have __________ melting points.
higher; lower
lower; higher
equal; higher
lower; equal
What is the chemical formula for potassium nitride?
NK3
K3N
K2N
KN3
What is the chemical name for NaF?
monosodium fluoride
sodium fluorine
sodium fluoride
monosodium monofluoride
Metals...
have a low melting point
are poor conductors
are malleable
are soft
Why don't noble gases react?
They have 2 electrons in their outermost valence shell.
The outermost energy level of the noble gases is full.
They form positive cations
They form negative anions.
What coefficient would balance this equation?
C2H4O2 + _____ O2 2 CO2 + 2 H2O
1
2
3
4
If 30g of KCl is dissolved in 100mL of water at 60oC, the solution is...
saturated
unsaturated
supersaturated
neutralized
In the model shown, the current flowing through each bulb will _________________________ the current at point A?
be less than
be more than
remain the same as
double
In a motor an electromagnet...
changes electrical energy into kinetic energy
changes magnetic energy into electrical energy
increases the strength of the magnet around it
provides electrical energy required to run.
The elements pictured in the diagram are __________ because they contain a different number of neutrons and the same number of protons.
Ions
Isotopes
Cations
Balanced
A nucleus is unstable and radioactive if
it has too few protons for the small number of neutrons
it has too many neutrons for a large number of protons
it has too many valence electrons for a small number of neutrons
it has too many valence electrons for a large number of neutrons
What force holds the nucleus of an atom together?
strong force
electrical force
magnetic force
atomic force
In the graph shown, the half life of Iodine-131 is
1 day
2 days
8 days
16 days
Which is the correct Bohr model for Calcium?
Which of the reactions shown is a double replacement reaction?
A
B
C
None
In the parallel circuit shown, what happens if bulb A goes out?
B and C go out
B and C stay on
B stays on and C goes out
C stays on and B goes out
In an ionic bond...
metals bond with nonmetals
nonmetals bond with metals
nonmetals bond with nonmetals
metals bond with metals
Carbon dioxide (CO2) would be classified as...
a covalent bond
a metallic bond
an ionic bond
a bipolar compound
The equation shown in the diagram is...
a balanced alpha decay equation
a balanced beta decay equation
an unbalanced alpha decay equation
an unbalanced beta decay equation
The half-life of sodium-25 is 1 minute. How many grams of sodium-25 remain after 4 minutes if 10 grams is the initial amount?
0.625
1.25
2.5
5
How many grams of Fe are needed in the following chemical reaction to obey the Law of Conservation of Mass?
39.4
10.8
73.2
66.2
Which model is balanced according to the law of conservation of mass?
a
b
c
none
Which model shows a stable ionic compound for aluminum sulfide?
A total of 750 J of work was done when a force of 125 N was exerted on a box to move it. How far was the box moved?
850 m
6.00 m
906 m
600 m
A roller coaster car moves on a roller coaster track through positions W, X, Y, and Z.
At what position will the roller coaster car most likely have the greatest kinetic energy?
Y
X
Z
W
A 1-kg block of ice is set into motion on a frictionless surface. It attains a speed of 5 m/s at point X.
What is the kinetic energy of the ice at point X?
2.5 J
12.5 J
25 J
5 J
How much power is used to lift a box that weighs 50 newtons 10 meters in 10 seconds?
50 watts
5,000 watts
5 watts
500 watts
What is the potential energy acquired by an object with a mass of 5.00 kilograms when it is raised 5.00 meters?
245 J
25.0 J
49.0 J
480 J
A 3.00-kg object rests on the roof's edge of a 10.0-m high building. What is the object's potential energy?
33.0 J
294 J
300 J
22.8 J
A student exerts a force of 500 N pushing a box 10 m across the floor in 4s. How much work does the student perform?
1,250 J
50 J
2,000 J
5,000 J
A student uses two identical balls to perform an investigation. The student throws ball A with a horizontal velocity from a height of 10 meters. At the same time, another student drops ball B from the same height without any horizontal velocity. Neglecting air resistance, which best describes the results?
Ball A will hit the ground first.
Ball B will hit the ground first.
Ball A will take twice as long to hit the ground.
Both balls will hit the ground at the same time.
This graph shows the motion of a person riding a bicycle.
Which time period shows the acceleration of the bicycle?
0-4 s
10-16 s
4-8 s
8-10 s
After a spacecraft takes off, its distance traveled is measured and is represented in this graph.
What is the average speed of the spacecraft?
5 kilometers per second
1 kilometers per second
12 kilometers per second
3 kilometers per second
This chart represents information about four different carts and the force applied to each cart.
Which cart will have the greatest amount of acceleration?
X
Y
W
Z
An object rolls east at a steady speed of 12 m/s for 3.0 seconds. What distance did it travel?
18 m
24 m
7 m
36 m
This graph represents the motion of an object.
What is the average speed of the object from time = 0 to time = 5 s?
1.2 m/s
5.0 m/s
6.0 m/s
0.8 m/s
A car starts from rest and accelerates uniformly at 1.7 m/s/s. How long will it take the car to reach a speed of 34 m/s?
2 s
58 s
20 s
200 s
Which diagram best shows forces acting on an object that is sitting at rest on a table?
A car's velocity changes from 0 m/s to 40 m/s in 5 seconds. What is the average acceleration of the car?
5 m/s/s
35 m/s/s
200 m/s/s
8 m/s/s
A student is a passenger in the front seat of a moving car. Which object is the best frame reference for the student to determine how fast the car is moving relative to the ground?
a signpost on the side of the road
the driver sitting next to the student
a truck traveling in the lane next to the car
a person sitting in the back seat of the car
This diagram shows an object being pushed along a frictionless surface. The object accelerates at 2 m/s/s.
What force was applied to the object?
6 N
5 N
1.5 N
1 N
Which statement is true about an object in freefall? Assume negligible air resistance.
The acceleration of the object increases as it falls.
The object has a constant acceleration.
The object has a constant velocity.
The velocity decreases as the acceleration decreases as it falls.
A 200-kg load is suspended from a cable on a crane. The load is moved upward at a constant velocity 20 m to the top of the building. What would be true of the force on the cable as it moved upward?
The force on the cable depended upon the energy of the crane.
The force on the cable remained the same.
The force on the cable decreased.
The force on the cable increased.
A student in a boat decided to go for a swim. He dove off the back of the boat, as shown in the diagram. The boat moved in the direction shown by the arrow.
Which statement best explains why the boat moved in the direction shown?
A body in motion tends to remain in motion.
The acceleration of a body is directly proportional to the force applied.
Friction on the bottom of the boat was reduced because of the lake water.
For every action there is an equal and opposite reaction.
Which graph represents a car with a positive acceleration?
A
B
C
D
A chair exerts a force of 20 N on a floor. What is the force that the floor exerts on the chair?
20 N
40 N
21 N
10 N
Two equal forces act at the same time on the same stationary object but in opposite directions. Which statement describes the object's motion?
It accelerates.
It remains stationary.
It moves at a constant speed.
It decelerates.
Carts A and B have the same mass. Both students have a mass of 80 kg.
If the student in cart A pulls the rope, what will result?
Both carts will move toward each other
Cart A will move toward a stationary Cart B.
Cart B will move toward a stationary Cart A.
Cart B will move faster than Cart A.
A 100-N force causes an object to accelerate at 2m/s/s. What is the mass of the object?
0.02 kg
102 kg
50 kg
200 kg
What was Niels Bohr's prediction about the location of the electrons in an atom?
Electrons orbit the nucleus in well-defined energy levels or orbitals.
Electron are scattered randomly in a positive background matrix.
Electrons can be found at various levels within an energy cloud surrounding the nucleus.
Electrons pair with protons and sta in the nucleus of the atoms.
Which best describes the current model of an atom?
a solid sphere unique for everything that exists
a central nucleus containing protons with electrons orbiting in specific paths
a solid sphere with electrons and protons embedded
a central nucleus containing protons and neutrons with electrons orbiting in levels of high probability.
An atom with which atomic diagram has chemical properties most similar to calcium?
A
B
C
D
Which distinguishes an atom of one element from an atom of a different element?
the number of protons
the number of electrons
the number of neutrons and protons
the number of neutrons
How many protons are in an atom of bromine?
45
35
115
80
A element with an atomic number of 51 and an atomic mass of 121 has how many neutrons in each atom?
51
172
70
121
Which diagram represents an electrically neutral atom?
A
B
C
D
What is the mass number in atomic mass units of an atom with 14 protons, 14 electrons, and 16 neutrons?
16 amu
14 amu
44 amu
30 amu
What is the atomic number of carbon-14?
7
12
6
14
Atomic masses are usually expressed as averages due to the existence of what phenomenon?
isotopes
radioactive decay
man-made elements
electrons
How do the atoms of carbon-12 and carbon-14 differ?
atomic number
number of neutrons
number of electrons
number of protons
Chlorine has two naturally occurring isotopes, chlorine-35 and chlorine-37. The atomic mass of naturally occurring chlorine is 35.45. Which statement is correct?
Chlorine-37 is more abundant.
Chlorine-35 is more abundant.
Chlorine-35 and chlorine-37 are equally abundant.
Chlorine-36 is more abundant.
This diagram shows a marble with a mass of 3.8 g that was placed into 10mL of water. What is the density of the marble?
0.95 g/cm3
1.05 g/cm3
1.27 g/cm3
0.79 g/cm3
Several common metal are listed in the chart.
Assuming equal masses of each, a cube of which metal would have the greatest volume?
silver
iron
aluminum
lead
This diagram represents four different liquids that have been poured into a container and have separated.
Which liquid has the greatest density?
Liquid 1
Liquid 2
Liquid 3
Liquid 4
This chart represents the melting points and boiling points for four substances.
Which substance is a solid at -200°C?
Hydrogen
Oxygen
Nitrogen
Chlorine
Question 17
10 pts
A solid substance is heated at a uniform rate. This graph shows how the temperature of the substance changes as heat is added.
According to the energy diagram shown, the substance will boil at what temperature?
140°C
90°C
-60°C
-10°C
How are potassium atoms and calcium atoms similar?
Same oxidation number
same number of protons
same number of valence electrons
same number of energy levels
An element on the far left side of the periodic table will have what property?
a tendency to lose electrons when reacting
a tendency to gain electrons when reacting
a tendency to share electrons when reacting
a tendency to avoid reactions
Which elements would most likely react with Group 2 (2A) metals?
halogens
transition metals
alkali metals
noble gases
Which elements are in the same period?
lead and sodium
silver and tin
tin and lead
oxygen and helium
Which compound is formed when aluminum bonds with fluorine?
AlF
Al3F
AlF2
AlF3
Which pair of elements will most readily form a compound?
Li and Be
Li and F
Li and Ne
Li and B
Which compound is most likely formed using covalent bonds?
KBr
K2O
CaBr2
SiO2
A teacher demonstrates a decomposition reaction. Which would be a correct demonstration?
burning methane in the presence of oxygen to produce carbon dioxide and water
reacting iron with oxygen to produce iron(III)oxide
running an electrical current through water to produce hydrogen and water
burning magnesium in the presence of oxygen to produce magnesium oxide
Which equation represents a double replacement reaction?
C
A
B
D
A chemical reaction is represented by this equation.
What is a product of this chemical reaction?
O2
Fe2O3
F
FeO
Which is a correctly balanced chemical equation?
B
D
C
A
The reaction of CaO and water is exothermic. A student mixes the two chemicals in a test tube and touches the side to of the test tube. Which statement describes the student's observation?
The test tube becomes cold as heat is released.
The test tube becomes cold as heat is absorbed.
The test tube becomes hot as heat is released.
The test tube becomes hot as heat is absorbed.
Solutions of lead(II) nitrate and potassium dichromate are mixed. The solution turns cloudy and yellow. Solid yellow particles fall to the bottom of the beaker. Which statement best describes this reaction?
A precipitate formed.
The reaction is exothermic.
A gas formed.
The reaction is endothermic.
Which solute exhibits the least response to temperature change?
NH3
NH4Cl
HCl
KCl
In a experiment, a researcher collected the following information about a solution made from a certain food.
pH = 3
taste = sour
reactivity = reacts with metals
Based on the information, what best describes this solution?
salt
acid
base
neutral
This is a pH chart of common materials.
What substance is the most basic?
Cheese
Baking Soda
Bleach
Soda
Which action would most effectively slow down the dissolving of a sugar cube in water?
stirring the water
heating the water
crushing the sugar
cooling the water
Which substance in water will conduct electricity?
corn starch
vegetable oil
salt
sugar
The loss of an alpha particle has what effect on the atomic number and mass number of an atom?
Atomic number and mass number both decrease.
Atomic number decreases; mass number increases
Atomic number and mass number both increase.
Atomic number increases; mass number decreases
Which best contrasts nuclear fission and nuclear fusion?
fission: splitting of small nuclei
fusion: joining of large nuclei
fission: needs extremely low temperatures
fusion: needs slightly higher temperatures than fission
fission: splitting of large nuclei
fusion: joining of small nuclei
fission: joining of small nuclei
fusion: joining of large nuclei
Where is nuclear fusion found?
nuclear power plants
atomic bombs
the sun and stars
hydrogen bomb
If data is considered precise, then all of the data points are __________.
close to the true or accepted value
all very small numbers
all very large numbers
all close to each other
15 L = ________ mL
0.0015 mL
0.15 mL
1500 mL
15000 mL
What's the dependent variable?
Which happens first?
make a hypothesis
make a plan
ask a question/make an observation
draw conclusions
Does the type of gasoline put in a car affect how fast the car can drive. What is the independent variable?
Type of gasoline
which car the gas is put into
how fast the car can drive
how much gas is put into the car
Freezing
Solid to gas
Liquid to solid
Gas to solid
What is happening when my ice cream changes from a solid to a liquid?
freezing
melting
burning
Particles of a liquid
are tightly packed together and stay in a fixed position.
are free to move around one another but still touch.
Liquid to Gas
Condensation
Evaporation
Sublimation
Freshly brewed black coffee
Heterogeneous
Homogeneous
Lucky Charms
Heterogeneous
Homogeneous
Air
Heterogeneous
Homogeneous
M&Ms
Heterogeneous
Homogeneous
What charge does an atom have when it GAINS electrons?
Positive
Negative
Neutral
Energy cannot be created or destroyed.
True
False
What type of energy transformation occurs when a piece of wood burns?
Electrical energy is released as radiant energy
Stored chemical energy is released as thermal energy
Mechanical energy is stored as chemical energy
No transformation occurs
What do all waves transfer?
Matter
Heat
Electricity
Energy
What is the number of complete waves passing a fixed point in a given amount of time?
Amplitude
Intensity
Wavelength
Frequency
Which type of waves have the longest wavelength?
Visible light
Radio waves
X-rays
Gamma-Rays
Shorter wave lengths can carry more energy. Which of these probably carries the MOST energy:
Infrared light
Visible light
X-rays
UV light
What does #2 represent?
Period
Frequency
Wavelength
Amplitude
What is the net force?
3 N
3 N, right
17 N, right
3 N, left
A ____________ is a push or a pull on an object.
friction
force
magnet
gravity
Forces that have a net force of zero Newtons
Balanced force
Unbalanced force
When we throw anything in air it always falls down because of _____
Friction
Gravity
Solid
motion
Which force acts backwards and prevent us form slipping on a wet floor?
Gravitational force
Magnetic force
Frictional force
Electrostatic force
When you put a book on a table, the table pushes on the book. This is an example of --
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
A person is pushed forward into their seatbelt when a car stops. This is an example of --
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
A larger car takes more force to move. This is an example of --
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
A brick sits on a table until you push on it. This is an example of --
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
The amount of matter in an object
gravity
mass
net force
inertia
Ability of an object to resist change of motion
gravity
force
net force
inertia
