Chapter 2 and 3 Flashcards

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1
Q

Vocab: element

A

Cannot be broken into different substances

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2
Q

Vocab: atom

A

Smallest unit of an element broken down into different substances

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3
Q

Vocab: compound

A

A substance made up of 2 or more different elements that chemically combine

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4
Q

Vocab: molecule

A

Smallest unit of a substance that keeps all physical and chemical properties of a substance

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5
Q

Vocab: mixture

A

A mix of many pure substances

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6
Q

Vocab: Heterogeneous

A

Substances are mixed uniformly

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7
Q

Vocab: Homogeneous

A

Same through out

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8
Q

Vocab: energy

A

The capacity to do work

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9
Q

Vocab: temperature

A

A measure of average kinetic energy

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10
Q

Vocab: Thermal energy

A

The kinetic energy (KE) of a substances atom

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11
Q

Vocab: Conservation of mass

A

Mass cannot be created or destroyed

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12
Q

Vocab: conservation of energy

A

Energy cannot be created or destroyed

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13
Q

Vocab: Melting

A

Change of a substance from a solid to a liquid

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14
Q

Vocab: Freezing

A

A change of a substance from a livid to a solid

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15
Q

Vocab: evaporation

A

Change of a substance from a liquid to a gas

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16
Q

Vocab: Sublimation

A

Solid turns directly to a gas

17
Q

Vocab: Condensation

A

Change of a substance from a gas to liquid

18
Q

4 indications of a chemical change

A
  1. ) heat and light
  2. ) new gas
  3. ) color change
  4. ) new solid
19
Q

List 3 main points of the kinetic theory of matter

A
  1. ) all matter is made of atoms and molecules that act like tiny particles
  2. ) these tiny particles are always in motion
  3. ) at the same temperature, more massive (heavier) particles move slower than less massive (lighter) particles
20
Q

List the 4 states of matter

A

Solid, liquid, gas, plasma

21
Q

State whether energy is released or energy is required for the following changes to take place: melting, sublimation, evaporation, condensation

A

Melting: released
Sublimation: released
Evaporation: released
Condensation: required

22
Q

Describe the shape and volume for each of the following: solid, liquid, gas

A

Solid: definite, definite
Liquid: not definite, definite
Gas: not definite, not definite

23
Q

Full in the blank: ____________is a measure of average kinetic energy

A

Temperature

24
Q

State the law of conservation of mass

A

Mass cannot be created or destroyed

25
Q

Vocab: matter

A

Anything that has made and occupies space