Knewton 1

Which physical form(s) of matter have neither a definite volume nor definite shape? A) Plasma B) Solid C) Liquid D) Gas

A) Plasma D) Gas

Which prefix means one one-hundredth? A) centi B) deci C) milli D) kilo

A) centi

Which of the following describes the gaseous state of matter? (check all that apply) A) It expands to fill its container B) it has a fixed shape C) particles are far away from one another, and experience little attraction D) the gas phase is the hottest phase

A) It expands to fill its container C) particles are far away from one another, and experience little attraction

Which of the following examples is considered a physical change? Select all that apply. A) boiling water B) slicing potatoes into fries C) freezing juice to make ice pops D) food rotting on the counter

A) boiling water B) slicing potatoes into fries C) freezing juice to make ice pops

Elements are made of atoms that all have the same properties. How many individual atoms (all with the same properties) can a pure substance contain and still be considered an element? A) 1 B) 2 C) 4 D) no limit as to how many atoms an element can consist of

D) no limit as to how many atoms an element can consist of

Which of the following can be characterized as a physical change? A) a copper pipe rusts B) milk goes sour C) firewood burns D) sweat evaporates from your skin

D) sweat evaporates from your skin

Homogeneous mixtures may be in any phase EXCEPT: A) gas B) liquid C) solid D) they may be in any phase

D) they may be in any phase

A molecule that is made up of more than one type of atom is known as A) element B) isotope C) compound D) subatomic particle

C) compound

Who was the first to propose the idea of atoms? A) Aristotle B) Democritus C) Plato D) Socrates

B Democritus

Which of the following statements about atoms and molecules are true? Select all that apply. A) All substances are composed of molecules. B) Atoms in a molecule are held together by chemical bonds. C) All molecules are composed of atoms. D) All substances are held together by chemical bonds.

B) Atoms in a molecule are held together by chemical bonds. C) All molecules are composed of atoms.

Which phase of water has the highest density? A) Solid B) Liquid C) Gas

B) Liquid

Which of the following statements is true about the relationship between atoms and molecules? Select all that apply. A) Molecules are smaller than atoms. B) Molecules are made of two or more atoms that are bonded together. C) Molecules may consist of one type of atom, or multiple types of atoms. D) Pure elements are always composed of atoms and compounds are always composed of molecules.

B) Molecules are made of two or more atoms that are bonded together. C) Molecules may consist of one type of atom, or multiple types of atoms

Which would you expect there to be more of, elements or compounds? Explain your answer. A) More elements seems most likely since there are more than 100 known elements. B) More compounds is most likely since compounds are made by combining elements, so there are more possible combinations. C) Elements and compounds must be equally abundant because compounds are made from elements. D) It is impossible to tell, because nobody knows how many compounds there are.

B) More compounds is most likely since compounds are made by combining elements, so there are more possible combinations.

The ampere is the base unit for electric current in what metric system? A)AI B) SI C) PI D) UI

B) SI

Which of the following is considered a chemical change? Select all that apply. A) crumpling a piece of paper into a ball B) burning wood in a fireplace C) digesting a delicious sandwich D) crushing ice for soda

B) burning wood in a fireplace C) digesting a delicious sandwich

A _______ is a substance with a fixed composition of atoms of two or more different elements that are bound together. A) mixture B) compound C) solution D) none of the above

B) compound

Which of the following terms describes the smallest particle of a substance that still retains the chemical properties of that substance? (Select all that apply.) A) mixture B) molecule C) atom D) neuron

B) molecule C) atom

Which of the following is NOT a base unit of SI? A) second B) ounce C) mole D) meter

B) ounce

______________ determine what element an atom belongs to, while ______________ allow atoms to do chemistry. A) electron, neutron B) protons, electrons C) neutrons, protons D) electrons, protons

B) protons, electrons

If something is a compound, it is also A) element B) pure substance C) mixture

B) pure substance

A homogeneous mixture is also known as a: A) compound B) solution C) solid D) all of the above

B) solution

Which of the following is NOT a likely indicator of a chemical change? A) the formation of a precipitate a color change B) the change in shape of a malleable metal C) the release of gas without adding D) heat or lowering the pressure

B) the change in shape of a malleable metal

Example of a compound A) hydrogen B) water C) mercury D) oxygen

B) water

A jeweler is creating a unique ring, and melts 16 g of silver in a sealed environment. Once the silver hardens, this jeweler sculpts the ring, reheats it, and adds 2 g of nickel. He delivers the ring to his client, who does not like it and asks him to remake it. The jeweler reheats the ring and tries again. What is the total mass of the ring at this point? A) 14g B) 16g C) 18g D) 20g

C) 18g

A pure substance that can be broken down by chemical changes is known as: A) element B) atom C) compound D) mixture

C) compound

Chicken noodle soup is an example of A) homegenius mixture B) pure substance C) heterogeneous mixture D) compound

C) heterogeneous mixture

Which of the following is TRUE about heterogeneous mixtures? Select all that apply. A) A heterogeneous mixture is a solution. B) A heterogeneous mixture can only be separated chemically. C) A heterogeneous mixture is not uniform in composition. D) A heterogeneous mixture is not a pure substance.

C) A heterogeneous mixture is not uniform in composition. D) A heterogeneous mixture is not a pure substance.

Choose the best explanation below for why dimensional analysis is also sometimes referred to as the factor label approach. A) It is sometimes called the factor label approach because it is only useful when multiplying quantities with units. B) It is sometimes called the factor label approach because writing the units for all factors in an expression is the only way to give them unique labels. C) It is sometimes called the factor label approach because units are treated as a factor (along with a numeric factor) in a quantity like 25g, allowing us to subject the unit to algebraic operations as if they were variables. D) It is sometimes called the factor label approach because it is used exclusively to come up with conversion factors for unit conversions.

C) It is sometimes called the factor label approach because units are treated as a factor (along with a numeric factor) in a quantity like 25g, allowing us to subject the unit to algebraic operations as if they were variables.

What SI unit is used for measurements of temperature? A) Fahrenheit B) Celsius C) Kelvin D) none of the above

C) Kelvin

In which state of better do particles stay tightly packed together, and vibrate without changing position? A) Gas B) Liquid C) Solid D) Plasma

C) Solid

Which of the following is an element? A) sugar B) water C) iron D) salt

C) iron

The characteristics of atoms are responsible for the following aspects of a type of matter, EXCEPT: A) color B) density C) monetary value D) luster

C) monetary value

Which of the following is NOT a physical property of a bronze medallion? A) that it is shiny B) that it is hard and durable C) that it will slowly change color over many years D) that it sinks in water

C) that it will slowly change color over many years

If you boil a sample of water, the steam that results will have? A) less mass than the water B) more mass than the water C) the same mass as the water D) impossible to predict

C) the same mass as the water

Which of the following units is a derived SI unit (not one of the SI base units)? A) meter B) kilogram C) second D) newton

D) newton

Which sentence gives the correct definition of a mixture? A) a mixture is two or more pure substances combined B) a mixture is a discrete unit of two or more atoms bound together C) a mixture is two or more elements combined in a. fixed ratio that cannot change

A) a mixture is two or more pure substances combined

Units of measurement provide which of the following? A) a standard comparison of measurements B) a magnitude of the measurement C) uncertainties of measurement D) all of the above

A) a standard comparison of measurements

The smallest unit of matter that is indivisible without utilizing a nuclear reaction is known as: A) atom B) molecule C) mixture D) compound

A) atom

A compound is a chemical substance composed of two or more kinds of elements in a fixed ratio. By what means can the components of a compound be separated? A) chemical means B) physical means C) both chemical and physical

A) chemical means

Which of the following is a physical change? Select all that apply. A) chopping wood B) bending metal C) cutting a cake D) frying an egg

A) chopping wood B) bending metal C) cutting a cake

Which of the following is NOT a physical property? A) combustibility B) conductivity C) malleability D) elasticity

A) combustibility

A homogeneous mixture like salt and water can be separated by: A) distillation B) electrolysis C) shaking vigorously D) filtration

A) distillation

A homogenous mixture varies from a heterogenous mixture in that a homogenous mixture has properties that: A) do not vary in the mixture B) vary in the mixture C) suspend in a liquid D) dissolve a solute

A) do not vary in the mixture

A substance that cannot be broken down into a simpler form by ordinary chemical means is known as: A) element B) compound C) mixture D) molecule

A) element

Which of the following can only consist of only one kind of atom? A) element B) pure substance C) compound D) mixture

A) element

Which of the following are considered a pure substance? Select all that apply. A) element B) compound C) mixture D) none of the above

A) element B) compound

When a change in a physical property is observed, A) it could be because of a physical change. B) it must be because of a chemical change. C) it must be because of a chemical change and a physical change. D) it could be caused by a change that is considered both physical and chemical.

A) it could be because of a physical change.

When a pure substance undergoes a change from a solid state to a gaseous state, this is an example of a A) physical change B) chemical change C) electrical change D) none of the above

A) physical change

Which of the following is NOT a substance made of one type of molecule? A) Carbon Dioxide B) Glucose C) Water D) A cell in the human body

D) A cell in the human body

Which state change occurs during vaporization? A) Solid to Liquid B)Solid to Gas C) Gas to Liquid D) Liquid to Gas

D) Liquid to Gas

Which of the following factors used in a dimensional analysis calculation have a finite number of significant figures (in other words, they are not exact numbers) that might limit the precision of the calculated value? A) A conversion factor for time of (60 min/1 hour) B) A conversion factor for distance of (1000 m/1 km) C) A measurement of speed equaling (27.7 km/hour) D) None of the above

D) None of the above

Which of the following events fail to follow the law of conservation of matter? A) Burning wood for a fire B) Freezing water into ice cubes C) The decomposition of MgCl2 into MG and Cl2 D) None of these

D) None of these

A mixture can be made up of two or more: A) elements B) compounds C) pure substances D) any of the above

D) any of the above

The elements hydrogen (H) and oxygen (O) combine to create hydrogen peroxide (H2O2), which is a pure substance that can only be broken down by chemical means. Hydrogen peroxide is BEST defined as a(n) _______________. A) mixture B) solution C) element D) compound

D) compound

The nucleus of an atom can be split into smaller components by what kind of process? A) physical process B) chemical process C) melting D) none of the above

D) none of the above