Question
1] In the scientific method, a hypothesis is _____. A ) is a statement of fact B ) makes a prediction that can be tested
1] In the scientific method, a hypothesis is _____.
A )is a statement of fact
B )makes a prediction that can be tested
C )is usually proven to be correct
D )can only be tested once
E )all of these
[2] Which of the following can be considered a definition of "theory?"
A )A theory can be an explanation of scientific laws.
B )A theory is an integrated explanation of numerous hypotheses, each supported by a large body of observations and experiments.
C )A theory is a condensation and simplification of many data that previously appeared unrelated.
D )A theory is a prediction for new data suggesting new relationships among a range of natural phenomena.
E )All of the above.
[3] An integrated explanation of numerous hypotheses is known as a _____.
A )fact
B )law
C )control
D )theory
E )guess
[4] What is the correct sequence of steps in the scientific method?
I. State a problem
II. Analyze and interpret data
III. Develop a hypothesis
IV. Share the results with other scientists
V. Design and perform experiment to test the hypothesis
A )I - II - III - IV - V
B )III - I - V - II - IV
C )V - IV - III - II - I
D )I - III - V - II - IV
E )V - II - I - III - IV
[5] The law of conservation of energy states that in the absence of external work input or output, _____.
A )energy cannot be created or destroyed
B )momentum cannot be created or destroyed
C )mass cannot be created or destroyed
D )energy can be created and then destroyed
[6] That family of elements that is highly nonreactive is called the _____.
A )alkaline earth family
B )transition metals
C )alkali metal family
D )rare gas family
[7] The role of a catalyst is to _____.
A )speed up a chemical reaction
B )slow down a chemical reaction
C )act as a reactant in a chemical reaction
D )serve as a product in a chemical reaction
[8] Ocean water has a pH around 8.2. Identify the correct statement.
A )Ocean water is neither acidic nor basic.
B )Ocean water is slightly acidic.
C )Ocean water is slightly basic.
D )Ocean water has a neutral pH.
[9] During an _____ reaction, _____.
A )exothermic; energy is released
B )endothermic; energy is absorbed
C )both are correct
D )both are incorrect
[10] Elements in the same period on the Periodic Table will have the _____.
A )same number of electrons in their outermost energy levels
B )same number of protons in their outermost energy levels
C )increasing number of protons as they move across the the period
D )decreasing number of protons as they move across the period
[11] Which of the following represents a chemical change?
A )Metal expanding when heated.
B )Dry ice, solid carbon dioxide, undergoing sublimation.
C )The burning of gasoline.
D )Ice melting
[12] Groups on the periodic table list elements with _____.
A )similar chemical properties
B )different chemical properties
C )similar number of electrons
D )similar number of neutrons
[13] Spectral lines are useful in _____.
A )Identifying atoms or molecules
B )understanding how electrons are arranged in atoms.
C )both of the above
D )none of the above
[14] Which of the following does not influence the rate of a reaction?
A )Temperature
B )Surface area
C )Concentration of reactants
D )Molar mass
[15] Cups made of different materials are sitting on the kitchen counter. Each is filled with hot coffee having the same temperature. Which type of cup will cool the quickest?
A )Glass
B )Ceramic
C )Metal
D )Styrofoam
[16] Which part of the visible region of the electromagnetic spectrum has the lowest energy?
A )The blue end.
B )The yellow end.
C )The red end.
D )The ultraviolet end.
[17] Which of the following forces is greatest?
A )Gravitational Force
B )Electromotive Force
C )Nuclear Force
D )Coulombic Force
[18] As the distance between two oppositely charged particles is tripled, _____.
A )the attractive force is one-third as large
B )the attractive force increases by a factor of three
C )the attractive force is one-ninth as large
D )the repulsive force is one-ninth as large
[19] Temperature is generally proportional to a substance's _____.
A )chemical energy
B )vibrational potential energy
C )rotational kinetic energy
D )average translational kinetic energy of the particles
[20] The force of gravity between two bodies depends on their _____.
A )masses and charges
B )masses and distance apart
C )charges and distance apart
D )masses only
[21] Identify the correct statement below dealing with Newton's Second Law.
A )Force and mass are inversely proportional to one another.
B )Force and acceleration are inversely proportional to one another.
C )Mass and acceleration are inversely proportional to one another.
D )Mass and acceleration are directly proportional to one another.
[22] A box is moved from the floor to the top of a table.
A )Work is done by the box.
B )Potential energy of the box increases.
C )Kinetic energy of the box is constant throughout the process.
D )None of the above
[23] Light waves and sound waves both consist of vibrations. However, _____.
A )sound waves require no medium for transmission
B )sound and light waves both require a medium for transmission
C )light waves require no medium for transmission
D )light waves require a medium for transmission
[24] Ifan object radiates more energy than it absorbs, its
A )thermal energy decreases
B )temperature decreases
C )both of these
D )neither of these
[25] TheDoppler effect is characteristic of
A )water waves
B )sound waves
C )light waves
D )all of these
[26]Which of the following statements best characterizes a gaseous phase on the molecular level?
A )Molecules in a gas are distributed randomly over relatively large volumes because they are moving fast enough to overcome molecular interactions.
B )Gas molecules have to interact with the air so they are pushed farther apart from one another.
C )Gas molecules are light enough to float away from one another.
D )Gases don't consist of molecules. They are separated into individual atoms and that is why they are in a gaseous phase.
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