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IPS > Key Terms 2 & 3 > Flashcards

Key Terms 2 & 3 Flashcards

0
Q

Element

A

A substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of the same element have the same atomic number

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1
Q

Matter

A

Anything that has mass and takes up space

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2
Q

Atom

A

The smallest unit of an element that maintains the chemical properties of that element

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3
Q

Molecule

A

The smallest particle of a substance that has all the chemical properties of that substance; a molecule is made up of one atom or two or more atoms bonded together

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4
Q

Compound

A

A substance made up of atoms of two or more different elements joined by chemical bonds

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5
Q

Pure substance

A

A sample of matter, either a single element or a single compound, that has a definite physical and chemical properties

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6
Q

Mixture

A

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

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7
Q

Melting point

A

The temperature and pressure at which a solid becomes a liquid

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8
Q

Boiling point

A

The temperature and pressure at which a liquid and a gas are at an equilibrium

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9
Q

Density

A

The ratio of the mass of a substance to the volume of that substance; commonly expressed as grams per cubic centimeter for solids and liquids and as grams per liter for gases

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10
Q

Reactivity

A

The capability of of a substance to combine chemically with another substance

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11
Q

Physical change

A

A change of one form of matter to another without a change in chemical properties

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12
Q

Chemical change

A

A change that occurs when one or more substances change into entirely new substances with different properties

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13
Q

Fluid

A

A nonsolid state of matter in which the atoms or molecules are free to move past each other, as in a gas or a liquid

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14
Q

Plasma

A

In physical science, a state of matter that consists of free-moving ions and electrons; a plasma’s properties differ from that of a solid, liquid, or gas

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15
Q

Energy

A

The capability to do work

16
Q

Temperature

A

A measure of how hot (or cold) something is; specifically, a measure of the average kinetic energy of the particles in an object

17
Q

Thermal energy

A

The total kinetic energy of a substance’s atoms

18
Q

Evaporation

A

The change of state from a liquid to a gas

19
Q

Sublimation

A

The process in which a solid turns directly into a gas

20
Q

Condensation

A

The change of state from a gas to a liquid

21
Q

Pascal

A

The SI unit of pressure; equal to the force of 1N exerted over an area of 1 square meters (Pa)

22
Q

Pressure

A

The amount of force exerted per unit area of a surface

23
Q

Buoyant force

A

The upward force that keeps an object immersed or floating on a fluid

24
Q

Viscosity

A

The resistance of a gas or a liquid to flow

25
Q

Gas laws

A

The laws that state the mathematical relationships between the volume, temperature, pressure and quantity of a gas

IPS (2 decks)

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