Matter (8th Grade Unit Test) Flashcards

1
Q

Physical property

A

A property of matter that can be observed or measured without changing the identity of the matter

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2
Q

Chemical property

A

A property of matter that describes a substance based on its ability to change into a new substance with different properties

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3
Q

States of Matter

A

The physical forms when which a substance can exist: states include solid, liquid, gas, and plasma

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4
Q

Solid

A

The state in which matter has a definite shape and volume

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5
Q

Liquid

A

A state in which matter takes the shape of its container and has definite volume

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6
Q

Gas

A

The state in which matter changes both in shape and volume

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7
Q

Plasma

A

The state of matter that does not have a definite shape or volume and his particles a broken apart; plasma is composed of electrons in positively charged ions

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8
Q

Element

A

A pure substance that cannot be separated or broken down by into simpler substances using physical or chemical means

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9
Q

Pure Substance

A

A substance in which there is only one type of particle; includes elements and compounds

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10
Q

Compound

A

A pure substance composed of two or more elements that are chemically combined

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11
Q

Mixture

A

A combination of two or more substances that are not chemically combined

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12
Q

Solution

A

A mixture that appears to be a single substance that is composed of particles of two or more substances that are distributed evenly amongst each other

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13
Q

Solute

A

The substance that is dissolved to form a solution

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14
Q

Solvent

A

The substance in which a solute is dissolved to form a solution

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15
Q

Concentration

A

A measure of the amount of solute dissolved in a solvent

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16
Q

Solubility

A

The ability to dissolve in another substance; more specifically, the amount needed to make a saturated solution using a given amount of solvent at a certain temperature

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17
Q

Suspension

A

A mixture in which particles of the material or dispense throughout a liquid or gas but are large enough that they settle out

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18
Q

Colloid

A

A mixture where the particles are dispersed throughout but are not heavy enough to settle out

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19
Q

Kinetic Theory Of Matter

A

The theory that all matter is made up of tiny particles that are in constant motion

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20
Q

Thermal Expansion

A

The increase in volume of a substance due to the increase in temperature

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21
Q

Density

A

The amount of matter in a given space

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22
Q

Atom

A

The smallest particle in which an element can be divided and still be the same substance

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23
Q

Acid

A

Any compound that increases the number of hydrogen ions when dissolved in water and whose solution taste sour and can change the color of certain compounds

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24
Q

Base

A

Any compound that increases the number of hydroxide ions when dissolved in water and who’s solution taste better, feel slippery, and can change the color of certain compounds

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25
Q

Conductivity

A

A measure of the ability of a given substance to conduct electric current

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26
Q

Organic compound

A

A covalent compound composed of carbon based molecules

27
Q

pH

A

Stands for: potential hydrogen. A measure of hydronium ion concentration in a solution; a pH of seven is neutral; pH less than seven is acidic; a pH greater than seven is basic

28
Q

Salt

A

An ionic compound formed from the positive ion of a base and a negative ion of an acid

29
Q

Combustibility/combustion

A

The burning of fuel; the process in which field combines with oxygen in a chemical change it produces thermal energy

30
Q

Reactivity

A

The relatives capacity of an Atom, molecule, or radical to undergo a chemical reaction with another Atom, molecule, or compound

31
Q

Acidity

A

The level of acid in substances (pH lower than 7)

32
Q

Basicity

A

The level of base in substances (pH higher than 7)

33
Q

What can be used to identify unknown substances?

A

Characteristic properties

34
Q

Give an example of a physical property

A
Shape
Solubility 
Density
Odor 
Melting Point 
Boiling Point 
Color
35
Q

Give an example of a chemical property

A
Acidity 
Basicity
Combustibility
Reactivity 
Flammability
36
Q

Volume

A

The amount of space taken up by an object

37
Q

Mass

A

The amount of matter in an object

38
Q

Are mass and weight the same or different?

A

DIFFERENT

39
Q

What is the difference between mass and weight?

A

Weight it the measure of gravitational force, and mass is the amount of matter in you.

40
Q

What is mass measured in?

A

Grams (g)

41
Q

Does your mass change on the moon?

A

No

42
Q

Does your weight change on the moon?

A

Yes

43
Q

How is density calculated

A

D= M/V

Density=Mass over Volume

44
Q

Characteristic properties are always the _____ whether the substance is big or small

A

Same

45
Q

Homogeneous mixture

A

The same appearance and properties throughout the mixture (solutions)

46
Q

Heterogeneous Mixture

A

Do not have the same appearance throughout in the components can be easily seen. (Suspensions and colloids)

47
Q

Is a solution homogeneous or heterogeneous?

A

HOMOGENEOUS

48
Q

Is a suspension homogeneous or heterogeneous?

A

Heterogeneous

49
Q

Is a colloid homogeneous or heterogeneous?

A

Heterogeneous

50
Q

Anything that takes up space is made of _____

A

Matter

51
Q

A ________ is a characteristic of matter

A

Property

52
Q

_________ properties describe how matter changes into a new matter

A

Chemical

53
Q

Color, shape, and texture are ________ properties

A

Physical

54
Q

Matter

A

Anything that has volume and mass

55
Q

________ is the amount of matter in an object

A

Mass

56
Q

The weight of objects is commonly measured on a ______

A

Scale

57
Q

_______ is the amount of space something takes up

A

Volume

58
Q

Volume can be measured in ________ or ___________________

A

Milliliters or cubic centimeters

59
Q

______is the amount of matter per unit of volume

A

Density

60
Q

Density equals mass divided by _______

A

Volume

61
Q

Which state of matter had surface tension

A

Liquid

62
Q

In Which state of matter do the particles vibrate in place?

A

Solid

63
Q

Which state of matter can be used in hydraulic systems

A

Liquid

64
Q

What is the SI Unit for expressing mass?

A

Kilogram