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Physical and Chemical Changes Flashcards

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1
Q

matter

A

Anything that has mass and takes up space

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2
Q

physical change

A

A change that alters the form of a substance, but does not change it to a new type of substance

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3
Q

evaporation

A

The process by which water is converted from its liquid form to its vapor form (gas), but does not require heat. (Sun converts water into gas).

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4
Q

condensation

A

The process by which gas is converted or changed to a liquid. For example, when warm air or gas gets cooler, it causes some of the air to condense into liquid water. (Cold glass of ice water on a sunny day or rain).

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5
Q

boiling

A

The process where a liquid is heated to a temperature in which the liquid bubbles and turns to gas.

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6
Q

freezing

A

The process which liquid turns into a solid when its temperature is lowered.

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7
Q

melting

A

The process in which a solid will melt into a liquid.

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8
Q

density

A

How much matter is compressed in an object. This property can affect the mass of an object.

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9
Q

chemical change

A

A change that results in forming one or more new substances.

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10
Q

physical property

A

A process of describing a substance or matter by only its physical traits (shape, size, hardness, color, odor density, melting point, boiling point). We can describe physical properties by using our 5 senses

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11
Q

chemical property

A

A process of describing a substance or matter by how it interacts with other substances.

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12
Q

corrosion

A

The chemical breakdown of metal, usually due to the action of oxygen (Example: rusting is a type of corrosion).

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13
Q

oxidation

A

The interaction between oxygen molecules (air) and all the different substances they may contact, from metal to living tissue.

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14
Q

volume

A

The amount of space a matter or substance takes up or occupies.

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15
Q

malleability

A

A quality that metals have. It’s the ability for a substance to be hammered or bent into a certain shape without breaking. (hammering gold into thin sheets or bending a paperclip).

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16
Q

solubility

A

A property that measures how much of a substance dissolves in a liquid. This is a physical property because the substance that is being dissolved can be brought back to its original form.

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17
Q

Law of Conservation of Mass

A

The matter can be changed from one form into another, mixtures can be separated or made, and pure substances can be decomposed, but the total amount of mass remains constant.

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18
Q

decomposition

A

The state or process of rotting.

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19
Q

compound

A

A substance made up of two or more different elements that have chemically combined.

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20
Q

change of state

A

The process when a substance changes from one state to another.

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21
Q

chemical reaction

A

A change in which one or more new substances are formed.

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22
Q

mixture

A

Two or more substances that are combined without being changed.

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23
Q

dissolve

A

The process of a substance breaking down and disappearing when mixed in a liquid.

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24
Q

texture

A

The physical appearance and feel of a substance.

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25
solid
This is a state of matter where its atoms are tightly packed together. It can be described as hard or firm.
26
liquid
This state of matter has a constant volume but no fixed shape, so it can flow and take on the shape of its container.
27
gas
This state of matter can expand freely and fill every space of a container no matter how large or small it is.
28
True or False? The amount of space an object takes up is known as volume.
True
29
True or False? A physical change results in one or more new substances with different properties.
False
30
True or False? Evaporation from boiling causes a change of state from a gas to a liquid.
False
31
True or False? Decomposition is a type of reaction that breaks down a substance into two or more substances. An example is rotting.
True
32
True or False? Toasting, roasting, and baking are all examples or clues of chemical change.
True
33
Tearing, crumpling, folding, or cutting paper are all examples of what kind of change?
Physical Change
34
A rule stating that in a chemical or physical change, mass is not created or destroyed; it only changes from one form to another.
Law of Conservation of Mass
35
The change of a liquid into a solid is called what?
freezing
36
The change of a solid into a liquid is called what?
melting
37
Is frying an egg a chemical change? Explain.
Yes, the matter changed into a new substance and the egg won't ever be raw again.
38
Give an example of a chemical change.
glow sticks, burning wood, rust, baking bread, ripening tomatoes, etc.
39
Give an example of a physical change.
cutting an orange, melting an ice cube, freezing water, cutting paper, etc.
40
True or False? Matter is lost or a substance loses some of its matter during a chemical change.
False
41
Is melting chocolate a physical change? Why or why not?
Yes. Melting chocolate is a physical change because it only changes state and it remains chocolate.
42
This is a state of matter where its atoms are tightly packed together. It can be described as hard or firm.
solid
43
This word explains how much matter is compressed in an object.
density
44
The process when a substance changes from one state to another?
change of state
45
If you describe a substance by its shape, size, texture, color, smell, volume, or density you are describing its what?
physical properties
46
Chemical properties are properties that describe how a substance interacts with other substances. Give one example of a chemical property.
oxidation, ability to burn, reactivity, color, or odor
47
Which change can be easily reversed?
physical change
48
Burning a candle is showing both a physical and chemical change at the same time. Explain how.
Melting wax is chemical, burning candle wick is physical
49
Milk turns sour is what type of change?
chemical change
50
If the chemical properties of a substance remain unchanged and the appearance or shape of a substance changes it is called what?
physical change
51
This state of matter has a constant volume but no fixed shape, so it can flow and take on the shape of its container.
liquid
52
The formation of gas bubbles is a sign of what type of change?
chemical change
53
The rusting of a bicycle is a physical or chemical property?
chemical property
54
Bread rising is a physical or chemical change?
chemical change
55
What is malleability?
It’s the ability for a substance, such as metals to be hammered or bent into a certain shape without breaking.
56
Solubility is a physical or chemical property? Explain.
Physical property: Solubility is a property that measures how much of a substance dissolves in a liquid. This is a physical property because the substance that is being dissolved can be brought back to its original form.
57
Mixing Kool-Aid powder in water is a physical or chemical change?
physical change
58
Burning leaves or wooden logs is a physical or chemical change?
chemical change
59
Freezing chocolate covered bananas is a physical or chemical change?
physical change
60
Melting ice cream is a physical or chemical change?
physical change
61
Iron and sulfur mix and form a partially magnetic black and yellow mixture. Is this a physical or chemical change?
chemical change
62
Vinegar reacts by fizzing and forming bubbles when mixed with baking soda is a physical or chemical change?
chemical change
63
Water boils at 100 degrees Celsius is a physical or chemical change?
physical change
64
True or False? Color is a clue that could indicate a physical and chemical change.
True
65
What type of change occurs when two solutions are mixed together and the new solution becomes hot?
chemical change
66
True or False? Odor is a physical and chemical property.
True
67
What is evaporation?
A change from liquid to gas.
68
A physical blend of 2 or more substances, retaining their original compositions, that can be separated by physical means is called?
mixture
69
A substance made up of two or more different elements that have chemically combined.
compound
70
This state of matter can expand freely and fill every space of a container no matter how large or small it is.
gas
71
Chewing an apple is a physical or chemical change?
physical change

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