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Science > Chapter 7 Test > Flashcards

Chapter 7 Test Flashcards

1
Q

Icm3 = ?

A

1mL

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2
Q

Icm3 =

A

1cm x 1cm x 1cm

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3
Q

Anything that has mass and takes up space can be considered as?

A

matter

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4
Q

Also known as the building blocks of matter, these tiny particles are 1,000,000 times smaller than the width of a human hair

A

atoms

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5
Q

If you were to investigate the nucleus of an atom, you would most likely find?

A

Neutrons and Protons

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6
Q

Matter with a composition that is always the same would be expected in a

A

substance

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7
Q

Iron, calcium, and carbon are all examples of?

A

elements

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8
Q

In order for a substance, containing two or more atoms of different elements, to be considered a compound, the atoms must be?

A

chemically combined

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9
Q

What would you call H20 and CO2?

A

compounds

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10
Q

Carbon -14 is an example of an?

A

isotope

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11
Q

H2O and CO2 are both examples of a?

A

compound

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12
Q

A ceasar salad is a great example of a?

A

heterogeneous mixture

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13
Q

When you mix a powdered drink like Gatorade with water, the mix is being referred to as the?

A

Solute

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14
Q

What is the ability of an object to be dissolved?

A

solubility

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15
Q

Which best classifies physical properties?

A

size dependant and size independent

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16
Q

What formula do we use to determine density?

A

mass/volume

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17
Q

name a size dependant property

A

volume

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18
Q

name a size independent property

A

melting point

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19
Q

What is another word for homogeneous mixture?

A

solution

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20
Q

What would be a good example of a physical change?

A

ice melting into a pool of water

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21
Q

When you have a physical change you will never end up with

A

a new substance

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22
Q

adding thermal energy to matter may cause

A

the state to change

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23
Q

the boiling point of matter is the point at which

A

a liquid becomes a gas

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24
Q

what do we call it when a gas becomes a liquid?

A

condensation

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25
Q

freezing and melting are reverse properties, but they occur…

A

at the same temperature

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26
Q

The law of conservation of mass

A

when the mass stays the same from the physical change of matter

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27
Q

which never changes during a physical change?

A

total mass

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28
Q

what is a good example of a chemical property?

A

ability to burn

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29
Q

when a small tree branch decomposes in a forest, this is an example of?

A

a chemical change

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30
Q

which signs show there is proof chemical change is happening?

A

the formation of a new substance

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31
Q

common things to see when a chemical change is happening are?

A

bubbles

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32
Q

when atoms collide and rearrange and bond into new combinations you have?

A

a new substance

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33
Q

what do we call the substances on the left side of a chemical equation before the reaction occurs?

A

reactants

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34
Q

what do we call the new substances formed after a chemical reaction?

A

products

35
Q

the arrow in a chemical formula is read as

A

yields

36
Q

Higher temperatures and concentrations usually increase the rate of the reaction, but you can increase the rate of the reaction by increasing the

A

surface area

37
Q

give an example of a reaction occurring faster due to larger surface area

A

ice cube melting in water

38
Q

the water level in a cylinder is determined by the

A

meniscus line

39
Q

we can determine the volume of irregular shapes by measuring the

A

displacement of water

40
Q

what is heavier, a pound of solid rock or a pound of feathers?

A

none. They both weigh a pound.

41
Q

substance

A

matter with a form that is always the same

42
Q

element

A

type of substance that only contains one type of atom

43
Q

every element has a different number of _____ in its _____

A

protons, nucleus

44
Q

Atomic number of Aluminum is 13 because?

A

The # of protons in aluminums nucleus is 13

45
Q

Compound

A

a type of substance containing two or more different elements chemically combined together

46
Q

chemical formulas

A

the combination of symbols and numbers that represent a compound

47
Q

mixture

A

matter that can vary in composition

48
Q

heterogeneous mixture

A

type of mixture where the individual substances are not evenly mixed (caesar salad)

49
Q

homogeneous mixture

A

a type of mixture in which the individual substances are evenly mixed (apple juice)

50
Q

describe the solvent and solutes

A

the solutes dissolve into the solvent (gatorade mix)

51
Q

dissolve

A

to form a solution by mixing evenly

52
Q

Diatomic Molecule

A

always comes in a pair (H2, O2)

53
Q

Physical property

A

a characteristic of matter that you can observe or measure without changing the identity of the matter

54
Q

size dependant properties

A

mass & volume

55
Q

mass

A

the amount of matter in an object

56
Q

volume

A

the amount of space something takes up

57
Q

size independant properties

A

physical properties that do not depend on the amount of matter present

58
Q

size independent properties

A

melting point & boiling point

59
Q

melting point

A

the temperature at which a solid becomes a liquid

60
Q

boiling point

A

the temperature at which a liquid becomes a gas

61
Q

Density

A

the mass per unit volume of a substance

62
Q

conductivity

A

the ability of matter to conduct or carry along an electric current

63
Q

thermal conductivity

A

the ability of a material to conduct thermal energy (stainless steel cooking pots)

64
Q

solubility

A

the ability for one substance to dissolve in another

65
Q

Physical change

A

a change in size, shape and form or state of matter in which the matters identity stays the same

66
Q

physical change in shape?

A

folding clothes to fit into a drawer

67
Q

physical change in size?

A

chewing food so its easier to digest

68
Q

thermal energy changes the state of matter by

A

adding or removing certain amounts of it

69
Q

as the particles in a solid move faster and faster, they will soon

A

overcome the forces that hold them together

70
Q

Sublimiation

A

when solids change directly to a gas

71
Q

Condensation

A

occurs when the particles are moving slowly enough for attractive forces to pull the particles together

72
Q

when liquids become solids, they are so packed together that the _____ can only now ___________

A

particles can only now vibrate in place

73
Q

Deposition

A

when a gas changes directly to a solid

74
Q

Explain dissolving using the example with salt in a tank

A

good job

75
Q

During a physical change, the properties of matter change, but the __________ before and the ___ stay the same.

A

particles present, mass

76
Q

chemical property

A

a characteristic of matter that can be observed as it changes to a different type of matter

77
Q

Chemical change

A

a change in matter in which the substances that make up the matter change into other substances with new physical and chemical properties

78
Q

Reaction

A

when particles crash into each other with enough force that they can move around and bond together in new combinations.

79
Q

chemical equations

A

shows the chemical formula of each substance in the reaction

80
Q

during both physical and chemical changes, the mass is ______. The total ___ must be _____

A

conserved, mass, equal

81
Q

changing a formula changes the _______ of a substance

A

identity

82
Q

Coefficients

A

changes the amount of reactants and products present

83
Q

Concentration

A

evens out to balance two substances combined

Science (18 decks)

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