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Science > Chemisty > Flashcards

Chemisty Flashcards

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1
Q

Matter

A

Something that has weight, volume

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2
Q

Chemistry

A

Is studying of matter and how matter changes throughout time

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3
Q

Substance

A

A substance is a matter that is pure

Example sailt

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4
Q

Physical property

A

It can be observed without changing into another substance

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5
Q

Chemical property

A

it’s a substance that has the ability to change into different substances

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6
Q

Element

A

Is a pure substance that can’t be broken down into any other substance by chemical or physical mean

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7
Q

atom

A

Its what elements are made up of

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8
Q

Chemical Bond

A

A chemical bond is when atoms attach to one another

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9
Q

Molecules

A

A Molecule is a group of two or more atoms held together by a chemical bond

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10
Q

compound

A

A compound is a substance that is made up of two or more elements that are chemically combined in the set ratio

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11
Q

Chemical formula

A

A chemical formula is a way of telling people information about an atom in a chemical from

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12
Q

Weight

A

It’s your weight like you weigh something.

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13
Q

Mass

A

it’s something that doesn’t change even when gravity changes.

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14
Q

International

System of units

A

Solids gases and liquids.

The Si unit of mass is in kg

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15
Q

Density

A

Is measure of the mass of a grams in one cubic centimeter

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16
Q

Volume

A

Volume is when you measure the enclosed space of a 3d object

17
Q

Physical change

A

It changes the form or appearance of a matter but it doesn’t turn any substances into matter.

18
Q

Chemical change or Chemical reaction

A

Brakes down into two or more other substances

19
Q

Law of conservation.

A

This law can also be called the law of conservation of matter since the mass is a measurement of matter

20
Q

Temperature

A

It’s how hot or cold something is

21
Q

Thermal Energy

A

Its the total energy of the motion of all the different particles in an object

22
Q

Endothermic change

A

Its a chemical reaction or physical change is endothermic

23
Q

Exothermic change

A

Its a chemical reaction that releases energy

24
Q

Chemical energy

A

Stored between chemical bonds in atoms

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