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Science > Science Chapter 2 Study Guide > Flashcards

Science Chapter 2 Study Guide Flashcards

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1
Q

Who first introduced the particle model of matter

A

Leucippus and democratus

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2
Q

Who famously oppose the particle model of matter

A

Aristotle

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3
Q

The constant random motion of particles in fluids caused by particle collisions

A

Brownian motion

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4
Q

The building blocks of all matter

A

Atoms

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5
Q

What does an atom consist of?

A

Protons, electrons, and neutrons

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6
Q

A distinct group of two or more atoms, conveniently bonded together

A

Molecules

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7
Q

The amount of matter in an object

A

Mass

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8
Q

What unit is mass measured in?

A

Gram

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9
Q

The measure of gravity acting on matter in an object

A

Weight

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10
Q

What unit is weight measured in?

A

SI unit

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11
Q

What changes based on location mass or weight?

A

Weight

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12
Q

Material made of only one kind of element or compound; not a mixture. It may be either an element or a compound.

A

Pure substance

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13
Q

A pure substance that consists of atoms with the same atomic number. Are the simplest of the pure substances

A

Element

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14
Q

A pure substance consisting of atoms of two or more different elements that are chemically combined. Atoms of a particular compound, always combine in the same proportion.

A

Compound

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15
Q

A physical combination of two or more substances in a changeable ratio

A

Mixture

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16
Q

A mixture that doesn’t have a uniform appearance since the combined substances are unevenly  distributed

A

Heterogeneous mixture

17
Q

A mixture that has a uniform appearance throughout

A

Homogeneous mixture

18
Q

What other name is given to a homogeneous mixture?

A

Solution

19
Q

Do the particles in a solid move

A

Yes

20
Q

States of matter are determined by the relationship between which two quantities

A

Kinetic energy of the particles, and the attractive  forces between them

21
Q

List the properties of solids

A

Close together, vibrate in place, fix volume, fixed shape, low, compressibility, high density, and not a fluid

22
Q

Solids with particles, arranged in regular repeating patterns

A

Crystalline solids

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