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science exam practice

Total questions: 176

Worksheet time: 1hrs 29mins

Name
Class
Date
1.

Which of the following is true about chemical reactions?

a)

Both They are accompanied by changes in energy and They form new substances with new properties.

b)

Neither They are accompanied by changes in energy nor They form new substances with new properties.

c)

They form new substances with new properties.

d)

They are accompanied by changes in energy.

2.

 

In an endothermic reaction, energy is

a)

converted to mass

b)

absorbed

c)

synthesized

d)

released

3.

 

In an exothermic reaction, energy is

a)

released

b)

synthesized

c)

absorbed

d)

coverted to mass

4.

Which of the following is NOT a physical property?

a)

flammability

b)

melting point

c)

state of matter

d)

density

5.

 

Ability to rust is a

a)

physical property

b)

chemical property

6.

Texture is a

a)

physical property

b)

chemical property

7.

 

Flammability is a

a)

chemical property

b)

physical property

8.

 

Substances formed as a result of a chemical reaction are called

a)

precipitates

b)

reactants

c)

catalysts

d)

products

9.

 

A chemical change can be indicated by

a)

Gas Production

b)

Volume Change

c)

Formation of a Precipitate

d)

Temperature Change

10.

Anything on the left of the arrow in a chemical equation is a

a)

reactant

b)

yields

c)

products

11.

chemical change?

a)

Any change that alters the form or parents of a substance but does not change it into another substance

b)

A change in matter that produces one or more new substances

c)

A solid that forms from liquids during a chemical reaction

12.

precipitate

a)

Any change that alters the form or parents of a substance but does not change it into another substance

b)

A change in matter that produces one or more new substances

c)

A solid that forms from liquids during a chemical reaction

13.

physical change

a)

A change in matter that produces one or more new substances

b)

Any change that alters the form or parents of a substance but does not change it into another substance

c)

A solid that forms from liquids during a chemical reaction

14.

 

Anything on the right of the arrow in a chemical equation is a

a)

yields

b)

reactant

c)

products

15.

In an exothermic reaction, products have "MORE" energy than reactants

a)

less

b)

true

c)

reactants

d)

products

16.

Water boils at 100°C. This is an example of a "CHEMICAL" property

a)

physical

b)

chemical

c)

true

d)

reaction

17.

 

Substances that enter into a chemical reaction are called "PRODUCTS".

a)

reactants

b)

reaction

c)

physical

d)

chemical

18.

 

The ability to react with oxygen is an example of a "CHEMICAL" property.

a)

true

b)

physical

c)

products

d)

true

19.

 

H2O ---> H2 + O2 ............... 100 g H2 = ? g O2

a)

793.68

b)

296.7

c)

1578.34

d)

393.68

20.

 

A reaction that has two compounds as reactants and two compounds as products is most likely a

a)

double replacement reaction

b)

synthesis reaction

c)

single replacement reaction

d)

decomposition reaction

21.

A number written in front of a chemical formula is a(n) ________________ .

a)

conservation of mass

b)

coefficient

c)

products

d)

replacement

22.

The principle that states that matter is neither created nor destroyed during a chemical reaction is called the law of __________________ .

a)

synthesis

b)

conservation of mass

c)

products

d)

coefficient

23.

The chemical formulas on the left side of an equation (those present before a chemical reaction) are known as the _____________ .

a)

reactants

b)

yields

c)

replacement

d)

products

24.

In a chemical equation, the arrow is read as ___________

a)

synthesis

b)

reactants

c)

replacement

d)

yields

25.

What is the general equation for a synthesis reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

___ + O2 --> ___ + CO2 + H2OAC + BD --> AD + BC

26.

 

What is the general equation for a decomposition reaction?

a)

AC + B --> A + BC

b)

A + B --> AB

c)

___ + O2 --> ___ + CO2 + H2O

d)

AB --> A + B

 

27.

What is the general equation for a single replacement reaction?

a)

AC + B --> A + BC

b)

AB --> A + B

c)

___ + O2 --> ___ + CO2 + H2O

d)

AC + BD --> AD + BC

28.

 

What is the general equation for a combustion reaction?

a)

AC + B --> A + BC

b)

___ + O2 --> ___ + CO2 + H2O

c)

A + B --> AB

d)

AB --> A + B

29.

Combining two or more elements or compounds to make a more complex compound.

a)

Combustion Reaction

b)

Synthesis Reaction

c)

Decomposition Reaction

d)

Double Replacement Reaction

30.

 

Breaking down a compound into simpler products.

a)

Single Replacement Reaction

b)

Synthesis Reaction

c)

Decomposition Reaction

d)

Combustion Reaction

31.

One element replaces another in a compound.

a)

Combustion Reaction

b)

Single Replacement Reaction

c)

Decomposition Reaction

d)

Double Replacement Reaction

32.

Two elements in a compound trade places with the elements in another compound, (to elements switch places).

a)

Synthesis Reaction

b)

Double Replacement Reaction

c)

Decomposition Reaction

d)

Decomposition Reaction

33.

 

"Burning" a compound that includes Hydrogen and Carbon in the presence of Oxygen. Two of the products will b H2O and CO2.

a)

Combustion Reaction

b)

 

Synthesis Reaction

c)

Double Replacement Reaction

d)

Single Replacement Reaction

34.

 

Who is the scientist credited with demonstrating the Law of Conservation of Mass?

a)

albert einstien

b)

charles darwin

c)

Antoine Lavoisier

d)

Marie Curie

35.

 

The amount of a substance in a given volume is the "CONCENTRATION" of the substance.

a)

true

b)

catalyst

c)

mass

d)

all

36.

"ONLY SOME" reactions require activation energy.

a)

lower

b)

true

c)

all

d)

decrease

37.

 

A(n) "INHIBITOR" decreases the rate of a reaction.

a)

true

b)

all

c)

catalyst

d)

mass

38.

 

The burning of fuels, such as coal, natural gas, or oil, releases energy and involves a(n) ______________ reaction

a)

exothermic

b)

endothermic

c)

decomposition

d)

concentration

39.

 

2Na + Cl2 --> 2NaCl .............................. 150 g Na = ? g NaCl

a)

381.31

b)

832.56

c)

509.34

d)

140.16

40.

activation

a)

the amount of a substance in a given volume

b)

the minimum amount of energy needed to start a chemical reaction

c)

biological catalysts that help reactions occur in the body

d)

increases the reaction rate by lowering the activation energy needed

41.

concentration

a)

biological catalysts that help reactions occur in the body

b)

increases the reaction rate by lowering the activation energy needed

c)

the amount of a substance in a given volume

d)

a material used to decrease the rate of a chemical reaction

42.

catalyst

a)

the amount of a substance in a given volume

b)

biological catalysts that help reactions occur in the body

c)

the minimum amount of energy needed to start a chemical reaction

d)

increases the reaction rate by lowering the activation energy needed

43.

enzyme

a)

biological catalysts that help reactions occur in the body

b)

the minimum amount of energy needed to start a chemical reaction

c)

increases the reaction rate by lowering the activation energy needed

d)

the amount of a substance in a given volume

44.

inhibitor

a)

biological catalysts that help reactions occur in the body

b)

increases the reaction rate by lowering the activation energy needed

c)

the amount of a substance in a given volume

d)

a material used to decrease the rate of a chemical reaction

45.

 

How does temperature affect the rate of a reaction?

a)

The colder the temperature, the faster the reaction

b)

The hotter the temperature, the faster the reaction

 

c)

The hotter the temperature, the slower the reaction

46.

How does surface area affect the rate of a reaction?

a)

The more surface area, the faster the reaction

b)

The less surface area, the faster the reaction

c)

the more surface area, the slower the reaction

47.

How does concentration affect the rate of a reaction?

a)

The more concentrated, the faster the reaction

b)

The less concentrated, the faster the reaction

c)

the more concentrated, the slower the reaction

48.

 

A catalyst is the opposite of a(n)

a)

surface area

b)

enzyme

c)

inhibitor

d)

concentration

49.

An enzyme is a type  of

a)

catalyst

b)

temperature

c)

surface area

d)

inhibitor

50.

In an endothermic reaction, the energy of the products is ______________ than the energy of the reactants.

a)

greater

b)

lower

c)

mass

d)

exothermic

51.

 

Increasing the temperature of a reaction will _____________ the rate of the reaction.

a)

increase

b)

lower

c)

mass

d)

concentration

52.

The amount of a substance in a given volume is called ________________________ .

a)

decomposition

b)

concentration

c)

endothermic

d)

exothermic

53.

solute

a)

Mixture in which particles can be seen and easily separated by settling or filtration

b)

The part of a solution that is present in the smaller amount is the

c)

The part of a solution that is present in a larger amount is the

d)

Mixture containing small, undissolved particles that do not settle out, but are large enough to scatter light

54.

solvent

a)

A dissolved mixture that contains a solvent and at least one solute

b)

The part of a solution that is present in a larger amount is the

c)

The part of a solution that is present in the smaller amount is the

d)

Mixture containing small, undissolved particles that do not settle out, but are large enough to scatter light

55.

colloid

a)

The part of a solution that is present in the smaller amount is the

b)

A dissolved mixture that contains a solvent and at least one solute

c)

The part of a solution that is present in a larger amount is the

d)

Mixture containing small, undissolved particles that do not settle out, but are large enough to scatter light

56.

suspension

a)

The part of a solution that is present in a larger amount is the

b)

Mixture containing small, undissolved particles that do not settle out, but are large enough to scatter light

c)

A dissolved mixture that contains a solvent and at least one solute

d)

Mixture in which particles can be seen and easily separated by settling or filtration

57.

solution

a)

The part of a solution that is present in a larger amount is the

b)

Mixture containing small, undissolved particles that do not settle out, but are large enough to scatter light

c)

A dissolved mixture that contains a solvent and at least one solute

d)

Mixture in which particles can be seen and easily separated by settling or filtration

58.

 

Colloids and Suspensions have ______________ particles compared to Solutions

a)

smaller

b)

larger

59.

 

Adding a solute to a solvent _________ the freezing point of the solution.

a)

raises

b)

lowers

60.

Which of the statements about the effect of solutes on solutions is true?

a)

 

Water with a solute dissolved in it will freeze at 0°C.

b)

Saltwater boils at a lower temperature than pure water.

c)

Solutes raise the freezing point of a solvent.

d)

Solutes raise the boiling point of a solvent.

61.

 

Brass is a solution in which a solid is dissolved in a(n)

a)

solid

b)

liquid

c)

gas

d)

water

62.

 

Which of the following statements about solutions is NOT true?

a)

A solution has the same properties throughout.

b)

Solutions are mixtures.

c)

The solute in a solution can be a solid, liquid, or gas.

d)

Solutions contain a solvent dissolved in a solute.

63.

Which of the following statements about the particles in a solution is true?

a)

When an ionic solid mixes with water, water molecules surround each ion.

b)

When a molecular solid mixes with water, water molecules surround each ion.

c)

When a molecular solid mixes with water, the covalent bonds are broken.

d)

When an ionic solid mixes with water, its ions repel water molecules.

64.

 

A liquid mixture in which particles can be seen and easily separated by settling or filtration is a

a)

solution.

b)

solute.

c)

solvent.

d)

suspension.

65.

If a suspension is allowed to stand, the particles "SETTLE OUT.

a)

true

b)

suspension

c)

smaller

d)

suspension

66.

Solutions and colloids are similar in that both are "SUSPENSIONS".

a)

solutions

b)

mixtures

c)

molecular

d)

true

67.

The largest particles in a colloid are "SMALLER" than the largest particles in a solution.

a)

larger

b)

smaller

c)

ionic

d)

colloid

68.

destructive interference

standing

a)

interaction between two waves that meet

b)

interaction of two waves that results in a wave with a smaller amplitude

c)

a wave that appears to stay in one place

d)

interaction of two waves that results in a wave with a larger amplitude

69.

standing wave

a)

interaction between two waves that meet

b)

points of maximum amplitude on standing waves

c)

a wave that appears to stay in one place

d)

the bending and spreading out of waves around the edge of a barrier

70.

constructive interference

a)

the bending and spreading out of waves around the edge of a barrier

b)

interaction of two waves that results in a wave with a smaller amplitude

c)

interaction of two waves that results in a wave with a larger amplitude

d)

interaction between two waves that meet

71.

interference

a)

interaction between two waves that meet

b)

interaction of two waves that results in a wave with a larger amplitude

c)

a wave that appears to stay in one place

d)

interaction of two waves that results in a wave with a smaller amplitude

72.

___________________ interference is used in some headphones to block out distracting noises in a listener’s surroundings.

a)

destructive

b)

deflection

c)

constructive

d)

resonance

73.

Waves change direction by diffraction, reflection, and

a)

deflection

b)

interference

c)

refraction

d)

resonance

74.

What happens to the speed of a wave if the medium, temperature, and pressure do not change?

a)

it decreases

b)

The wave stops

c)

It stays the same

d)

 

It increases

75.

frequency

a)

a wave's length

b)

often a wave passes a certain point in a given amount of time

c)

how fast a wave travels

d)

a wave’s energy

76.

crest

a)

High Point on a transverse wave

b)

A low point on a transverse wave

c)

An area where the coils are close together

d)

A wave that vibrates the medium in the same direction in which the wave travels

77.

compression

a)

An area where the coils are close together

b)

Waves that require a medium to travel

c)

An area where the coils are spread out.

d)

An area where the coils are close together

78.

Longitudinal Wave

a)

High Point on a transverse wave

b)

An area where the coils are close together

c)

A wave that vibrates the medium in the same direction in which the wave travels

d)

A low point on a transverse wave

79.

rarefaction

a)

High Point on a transverse wave

b)

An area where the coils are spread out.

c)

A low point on a transverse wave

d)

A wave that vibrates the medium in the same direction in which the wave travels

80.

This type of mechanical wave vibrates parallel to the medium?

a)

Surface

b)

Transverse

c)

Longitudinal

81.

This type of mechanical wave vibrates the medium perpendicular or at a right angle to the medium?

a)

Surface

b)

Transverse

c)

Longitudinal

82.

 

What type of mechanical wave is sound?

a)

longitudinal

b)

transverse

c)

surface

83.

What type of mechanical wave is light?

a)

longitudinal

b)

transverse

c)

surface

84.

 

What is the bottom of a wave called?

a)

trough

b)

summit

c)

valley

d)

crest

85.

 

What is the top of a wave called?

a)

crest

b)

summit

c)

valley

d)

trough

86.

Thermal Expansion is

a)

The expanding of matter when it is submerged in a liquid

b)

The expanding of matter when it is cooled

c)

The expanding of matter when it is heated

d)

The contracting of matter when it is heated

87.

The specific heat is the amount of

a)

energy required to raise the density of 1 kilogram of material by 1 liter

b)

energy required to raise the temperature of 1 kilogram of material by 1 kelvin

c)

energy required to raise the mass of 1 kilogram of material by 1 kilogram

d)

energy required to raise the volume of 1 liter of material by 1 liter

88.

Metal ________________ when it is heated

a)

contracts

b)

expands

c)

does nothing

89.

An oven mitt is used because it is a good

a)

insulator

b)

conductor

90.

 

A metal pan is used because it is a good

a)

conductor

b)

insulator

91.

 

Gold has a specific heat of 126 J/(kg·K). A sculptor increased the temperature of a 0.5 kg block of gold by 10°C. How much energy did the sculptor add to the gold?

a)

630

b)

890

c)

730

d)

530

92.

insulator

a)

A material that does not conduct heat well.

b)

The amount of energy it takes to raise the temperature of 1 kg of material 1 kelvin.

c)

A material that conducts heat wel

d)

The expanding of matter when it is heated.

93.

thermal expansion

a)

A material that does not conduct heat well.

b)

A material that conducts heat well.

c)

The expanding of matter when it is heated.

d)

The amount of energy it takes to raise the temperature of 1 kg of material 1 kelvin.

94.

conductor

a)

The expanding of matter when it is heated.

b)

A material that conducts heat well.

c)

The amount of energy it takes to raise the temperature of 1 kg of material 1 kelvin.

d)

A material that does not conduct heat well.

95.

specific heat

a)

A material that does not conduct heat well.

b)

The amount of energy it takes to raise the temperature of 1 kg of material 1 kelvin.

c)

A material that conducts heat well.

d)

The expanding of matter when it is heated.

96.

 

Most metals are good _______________

a)

conductors

b)

insulators

c)

atoms

d)

cells

97.

Temperature is measured in

a)

kelvin

b)

grams per liter

c)

joules

d)

kilograms

98.

Mass is measured in

a)

kilograms

b)

grams per liter

c)

kelvin

d)

joules

99.

 

Energy is measured in

a)

joules

b)

kelvin

c)

grams per liter

d)

kilograms

100.

 

These do not allow energy to move through them easily

a)

insulators

b)

atoms

c)

cells

d)

conductors

101.

 

These allow energy to move through them easily

a)

conductors

b)

cells

c)

insulators

d)

atoms

102.

 

To keep food warm or cool, coolers are made out of materials that are

a)

insulators

b)

stainless steel

c)

cast iron

d)

conductors

103.

As the thermal energy of matter _________________, its particles usually spread out.

a)

increases

b)

decreases

c)

stays the same

104.

 

Heat that is transferred by the movement of currents within a fluid is called

a)

conduction

b)

specific heat

c)

convection

d)

radiation

105.

The only form of heat transfer that does not require matter is

a)

radiation

b)

specificheat

c)

conduction

d)

convention

106.

is the transfer of energy by electromagnetic waves.

a)

conduction

b)

specific heat

c)

convection

d)

radiation

107.

Heat is transferred directly from one particle of matter to another by the process of

a)

specific heat

b)

conduction

c)

convection

d)

radiation

108.

The inside window pane in your house feels very cold to touch on a winter night. Why does it feel cold?

a)

The cold from the outside is being conducted to the inside.

b)

The warm from the inside is being conducted to the outside.

c)

The warm from the inside is flowing out by convection.

d)

The cold from the outside is flowing in by convection.

109.

An air fryer cooks food through the process of

a)

radiation

b)

specific heat

c)

convection

d)

conduction

110.

Malia burned herself when she picked up a hot iron skillet from the stove. What method of heat transfer caused the burn?

a)

specific heat

b)

radiation

c)

convection

d)

conduction

111.

On a sunny day, you return to your car after a ball game. The inside of the car is very hot. How did the car get so warm?

a)

radiation

b)

specific heat

c)

convection

d)

conduction

112.

 

Water bubbles up through a hot spring at Yellowstone National Park. What method of heat transfer is this?

a)

radiation

b)

convection

c)

conduction

d)

specific heat

113.

radiation

a)

the transfer of heat by the movement of currents within a fluid

b)

the transfer of energy by electromagnetic waves

c)

the transfer of heat directly from one particle of matter to another without the movement of the matter

d)

circular flow of warmer and cooler fluid

114.

convection current

a)

the transfer of energy by electromagnetic waves

b)

circular flow of warmer and cooler fluid

c)

the transfer of heat directly from one particle of matter to another without the movement of the matter

d)

the transfer of heat by the movement of currents within a fluid

115.

conduction

a)

the transfer of energy by electromagnetic waves

b)

the transfer of heat directly from one particle of matter to another without the movement of the matter

c)

circular flow of warmer and cooler fluid

d)

the transfer of heat by the movement of currents within a fluid

116.

 

You feel the warm glow of a bonfire.

a)

radiation

b)

convection

c)

conduction

117.

A kite rises high above a hot, sandy beach.

a)

radiation

b)

convection

c)

conduction

118.

 

The inside frame of your front door feels cold during winter. 

a)

conduction

b)

convection

c)

radiation

119.

A burner on a stove heats the bottom of a pan.

a)

conduction

b)

radiation

c)

convection

120.

Sunlight melts a wax crayon left outside.

a)

radiation

b)

convection

c)

conduction

121.

An entire lake is heated by water from a hot spring at the bottom of the lake.

a)

radiation

b)

convection

c)

conduction

122.

Compare the freezing point of water on the Celsius and the Fahrenheit temperature scales.

a)

Water freezes at 0° on the Celsius scale and 0° on the Fahrenheit scale.

b)

Water freezes at 0° on the Celsius scale and 32° on the Fahrenheit scale.

c)

Water freezes at 32° on the Celsius scale and 0° on the Fahrenheit scal

123.

What is meant by absolute zero.

a)

The same as 0 Fahrenheit.

b)

The highest temperature possible. At this temperature, the particles in the object have unlimited kinetic energy.

c)

The same as 0 Celcius.

d)

The lowest temperature possible. At this temperature, the particles in the object have no kinetic energy. It occurs at 0 K.

124.

Two glasses of water have the same thermal energy. Do they have the same temperature?

a)

We don't know.

b)

No, one glass might have more water in it than the other, so its temperature would be lower for it to have the same thermal energy

c)

Yes, one glass might have more water in it than the other, so its temperature would be higher for it to have the same thermal energy

125.

Celsius

a)

Scale scientists use to measure temperature

b)

on this scale, water boils at 100 degrees

c)

Transfer of a warmer object to a cooler object

d)

used by the United States measure temperature

126.

temperature

a)

on this scale, water boils at 100 degrees

b)

a measure of the average kinetic energy of the individual particles in an object

c)

the transfer of thermal energy from a warmer object to a cooler one

d)

the temperature at which no more thermal energy can be removed from an object

127.

heat

a)

the transfer of thermal energy from a warmer object to a cooler one

b)

the temperature at which no more thermal energy can be removed from an object

c)

on this scale, water boils at 100 degrees

d)

Transfer of a warmer object to a cooler object

128.

absolute zero

a)

the temperature at which no more thermal energy can be removed from an object

b)

a measure of the average kinetic energy of the individual particles in an object

c)

the transfer of thermal energy from a warmer object to a cooler one

d)

the temperature at which no more thermal energy can be removed from an object

129.

Fahrenheit

a)

Scale scientists use to measure temperature

b)

used by the United States measure temperature

c)

on this scale, water boils at 100 degrees

d)

a measure of the average kinetic energy of the individual particles in an object

130.

kelvin scale

a)

on this scale, water boils at 100 degrees

b)

Scale scientists use to measure temperature

c)

used by the United States measure temperature

d)

Transfer of a warmer object to a cooler object

131.

Heat

a)

Scale scientists use to measure temperature

b)

Transfer of a warmer object to a cooler object

c)

used by the United States measure temperature

d)

the temperature at which no more thermal energy can be removed from an object

132.

temperature

a)

a measure of the average kinetic energy of the individual particles in an object

b)

the temperature at which no more thermal energy can be removed from an object

133.

absolute zero

a)

the temperature at which no more thermal energy can be removed from an object

b)

a measure of the average kinetic energy of the individual particles in an object

134.

Object A is hotter than object b, therefore object A has ____________ thermal energy than (as) object B.

a)

less

b)

more

c)

the same

135.

Thermal Energy and Heat are measures of the

a)

size of particles in an object.

b)

motion of particles in an object.

c)

density of particles in an object.

d)

state of particles in an object.

136.

Heat flows from

a)

hotter to colder

b)

is destroyed

c)

colder to hotter

d)

does not transfer

137.

 

Energy always transfers from

a)

more energy to less energy

b)

less energy to more energy

c)

is destroyed

d)

does not transfer

138.

This (These) temperature scale(s)  does have negative values

a)

Fahrenheit

b)

Celcius

c)

kelvin

d)

liters

139.

 

The three temperature scales are

a)

Fahrenheitd

b)

Kelvin

c)

Celcius

d)

density

140.

 

If you could turn off a centripetal force, _____________ would cause the object to fly off in a straight line.

a)

Centripetal Force

b)

Satellite

c)

Momentum

d)

Inertia

141.

Satellites in orbit around Earth continually fall toward _________________ .

a)

Direction

b)

to the center

c)

Gravity

d)

Centripetal Force

142.

_______________ is the centripetal force that causes a satellite to move in a circle.

a)

Momentum

b)

Gravity

c)

Inertia

d)

Direction

143.

An object traveling in a circle is accelerating because it is constantly changing _______________ .

a)

satellite

b)

Direction

c)

Centripetal Force

d)

inertia

144.

Any object that travels around another object in space is a(n) _____________ .

a)

satellite

b)

direction

c)

gravity

d)

inertia

145.

The acceleration due to gravity near the surface of Earth is equal to

a)

9.8 kg × m/s

b)

9.8 m/s2

c)

9.8 m/s

d)

9.8 N

146.

The state that exists when the only force acting on an object is gravity is called

a)

momentum

b)

free fall

c)

acceleration

d)

inertia

147.

Centripetal Force

a)

Motion where the acceleration is caused by gravity

b)

Force that causes objects to move in a circular path

c)

Objects in orbit around the earth, which are continuously falling toward the Earth.

148.

Satellite

a)

Force that causes objects to move in a circular path

b)

Motion where the acceleration is caused by gravity

c)

Objects in orbit around the earth, which are continuously falling toward the Earth.

149.

Free Fall

a)

Force that causes objects to move in a circular path

b)

Motion where the acceleration is caused by gravity

c)

Objects in orbit around the earth, which are continuously falling toward the Earth.

150.

_____________ causes and object to move in a circular path.

a)

momentum

b)

Centripetal Force

c)

Time

d)

Velocity

151.

law of conservation of momentum

a)

A law that states that the total momentum of a group of objects remains the same unless outside forces act on the objects.

b)

is a characteristic of a moving object related to the object’s mass and its velocity

152.

momentum

a)

A law that states that the total momentum of a group of objects remains the same unless outside forces act on the objects.

b)

is a characteristic of a moving object related to the object’s mass and its velocity

153.

Suppose you have two toy cars. Each has a mass of 0.04 kg. The cars have tape on their bumpers that will cause them to stick together. One car is stopped on the track. The other car, traveling at a velocity of 4 m/s, hits the first car. Is this a sticky or non-sticky collision?

a)

Sticky

b)

Non-Sticky Collision

154.

Suppose you have two toy cars. Each has a mass of 0.04 kg. The cars have tape on their bumpers that will cause them to stick together. One car is stopped on the track. The other car, traveling at a velocity of 4 m/s, hits the first car. What is the momentum of the coupled cars?

a)

0.16 kg × m/s2

b)

0.32 kg × m/s

c)

0.16 kg × m/s

d)

0.32 kg × m/s3

155.

What is the momentum of a 20-kg dog running at a speed of 8 m/s?

a)

190 m/s

b)

160 kg × m/s

c)

160 kg × m/s2

d)

180 kg

156.

Newton’s quantity of motion is "CONSERVATION".

a)

strength

b)

Momentum

c)

trade

d)

true

157.

If outside forces such as friction are negligible, when two objects of the same mass collide and do not stick together, the objects "MULTIPLY" velocities.

a)

Trade

b)

Momentum

c)

Strength

d)

true

158.

 In which situation does the law of conservation of momentum apply?

a)

in the presence of least velocity

b)

in the absence of greatest velocity

c)

in the absence of outside forces

d)

in the presence of outside forces

159.

 

Which formula is used to calculate momentum?

a)

Momentum = Mass × Speed

b)

Momentum = Weight × Speed

c)

Momentum = Volume × Velocity

d)

Momentum = Mass × Velocity

160.

Newton's Third Law

a)

If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.

b)

An object at rest will remain at rest unless acted upon by a non-zero net force. An object moving at a constant velocity will continue moving at a constant velocity unless acted upon by a non-zero net force.

c)

On object's acceleration depends on its mass and on the net force acting on it.

161.

 

Newton's Second Law

a)

If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.

b)

An object at rest will remain at rest unless acted upon by a non-zero net force. An object moving at a constant velocity will continue moving at a constant velocity unless acted upon by a non-zero net force.

c)

On object's acceleration depends on its mass and on the net force acting on it.

162.

 

Newton's First Law

a)

An object at rest will remain at rest unless acted upon by a non-zero net force. An object moving at a constant velocity will continue moving at a constant velocity unless acted upon by a non-zero net force.

b)

If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.

c)

On object's acceleration depends on its mass and on the net force acting on it.

163.

Acceleration =

a)

Velocity / Acceleration

b)

Net Force / Mass

 

c)

Net Force X Mass

d)

Velocity X Acceleration

164.

Force =

a)

Velocity X Acceleration

b)

Mass X Acceleration

c)

Mass / Acceleration

d)

Velocity / Acceleration

165.

An object’s resistance to a change in its motion

a)

inertia

b)

velocity

c)

speed

d)

direction

166.

To increase acceleration of an object, you reduce its ________________ or increase the applied force

a)

volume

b)

density

c)

mass

167.

What is the force that acts as an inward pull toward any object with mass?

a)

gravity

b)

friction

c)

time

d)

electricity

168.

When you stand on a bathroom scale, it displays the _________________ that Earth is exerting on you.

a)

Fluid

b)

Gravitational Force

c)

Friction

d)

sliding

169.

 

If Mr. O'Hara exerts a force of 10 N to push a desk to the right at the same time Mrs. Long exerts a force of 15N to push the desk to the left, the desk will move to the "LEFT".

a)

right

b)

true

170.

Balanced forces "DO NOT CHANGE" the motion of an object.

a)

do change

b)

true

171.

A base produces ____________________ ions in water.

a)

hydroxide

b)

hydrogen

c)

ph scale

d)

red

172.

 

A strip of blue litmus paper placed in a beaker of vinegar will turn _______________.

a)

red

b)

blue

c)

yellow

d)

green

173.

Which of the following statements is NOT true about neutralization?

a)

An acid and a base are the reactants.

b)

It produces an acid-base mixture that is more acidic than both the individual starting solutions.

c)

There is no color change in litmus paper when the reaction is over.

d)

A salt and water are the products.

174.

The negative ion found in bases is the

a)

hydroxide ion

b)

carbonate ion

c)

hydrogen ion

d)

water ion

175.

Corrosive

a)

A substance that turns different colors in an acid or a base.

b)

A substance that can wear away certain materials.

176.

Indicator

a)

A substance that turns different colors in an acid or a base.

b)

A substance that can wear away certain materials.

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