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physical science 🔬 > L6 | MATTER | States of matter > Flashcards

L6 | MATTER | States of matter Flashcards

1
Q

What are the three states of matter?

A
  • Solids
  • Liquids
  • Gas
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2
Q

What is it called when a solid turns into a liquid?

A

Melting.

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3
Q

Liquid to solid?

A

Freezing.

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4
Q

Solid to gas?

A

Sublimation.

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5
Q

Gas to solid?

A

Deposition.

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6
Q

Liquid to gas?

A

Evaporation.

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7
Q

Gass to a liquid?

A

Condensation.

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8
Q

Brownian motion?

A

Random movement of microscopic particles in suspension in a liquid or gas.

The diffusion of many particles.

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9
Q

What is Brownian motion caused by?

A

Collisions between dirt particles and the molecules of the liquid or gas.

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10
Q

What is DIFFUSION?

A

The movement of particles from a high concentration to a low concentration.

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11
Q

What is diffusion caused by?

A

The constant thermal motion of particles.

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12
Q

During a change of state, what happens to the physical properties?

A

They change.

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13
Q

What happens to the chemical composition during a change of state?

A

Remains the same.

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13
Q

What is the Law of conservation of mass?

A

The total mass of the particles before the state change and after the state change remains constant.

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14
Q

Melting point?

A

The temperature at which a solid changes its phase or state to become a liquid. The process is called melting.

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15
Q

Freezing point?

A

The temperature at which a liquid changes its phase to become a solid. The process is called freezing.

15
Q

Boiling point?

A

The temperature at which a liquid changes its phase to become a gas. The process is called evaporation.

16
Q

Evaporation?

A

Evaporation from a liquid’s surface can happen at a wide range of temperatures. If more energy is added then bubbles of gas appear inside the liquid and this is known as boiling.

17
Q

What is the heating curve of a substance?

A

Shows the changes in temperature as we move from a solid to a liquid to a gas.

18
Q

What is the cooling curve of a substance?

A

Shows the changes in temperature as we move from gas to liquid to solid.

19
Q

At what temperature is between the melting and boiling point of water?

A

96 degrees Celsius.

20
Q

At what temp does water freeze?

A

-2 degrees Celsius.

21
Q

What happens at 101 degrees Celsius?

A

It turns into a gaseous state.

physical science 🔬 (25 decks)

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