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.