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Astronomy > Year Seven Chemisty Revision > Flashcards

Year Seven Chemisty Revision Flashcards

1
Q

Give examples and the properties of solids

A

Properties: Definite shape and volume, particles are tightly packed and only vibrate in place.
Examples: Ice, diamond, wood.

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2
Q

Give examples and the properties of liquids

A

Properties: Definite volume but no definite shape, particles are close but can move past each other.
Examples: Water, oil, juice.

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3
Q

Give examples and the properties of gasses

A

Properties: No definite shape or volume, particles are far apart and move freely.
Examples: Air, helium, water vapor.

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4
Q

What are the five changing states of matter?

A

Melting, Freezing, Evaporation, condensation, sublimation and deposition

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5
Q

What is melting?

A

When a solids melts to a liquid

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6
Q

What is freezing?

A

When a liquid freezes to a solid

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7
Q

What is evaporation?

A

When a liquid changes to a gas

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8
Q

What is condensation?

A

When a gas changes to a liquid

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9
Q

What is sublimation?

A

When a solid turns into a gas

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10
Q

What is deposition?

A

When a gas turns into a solid

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11
Q

What is the particle model of a solid?

A

Solids have tightly packed particles.

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12
Q

What is the particle model of a liquid?

A

Liquids have loosely packed particles.

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13
Q

What is the particle model of a gasses?

A

Gasses have particles that are far about and move around all over the place.

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14
Q

What is a physical changes?

A

When a substance changes state or appearance, without changing the substance itself

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15
Q

What is a chemical change?

A

A change that forms a new substance.

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16
Q

What is a chemical reaction?

A

The processes where reactants transform into products, often involving energy changes.

17
Q

What is a mixture?

A

The combination of two or more substances that are not chemically bonded

18
Q

What is a solution?

A

Homogeneous mixtures where one substance is dissolved in another.

19
Q

What is a suspension?

A

Heterogeneous mixtures where particles are dispersed but not dissolved.

20
Q

What is a soluble?

A

A substance that do not dissolve in a solvent.

21
Q

What is insoluble?

A

A substance that do not dissolve in a solvent.

22
Q

What is a metal?

A

Typically shiny, good conductors of heat and electricity, malleable.

23
Q

What is a non-metal?

A

Usually not shiny, poor conductors, brittles.

24
Q

What is a pure substance?

A

Substances with a fixed composition and distinct properties.

Astronomy (2 decks)

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