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Sci 1 > Sci 2 > Flashcards

Sci 2 Flashcards

1
Q

What is the basic unit of matter?

A

Atom

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2
Q

What is a pure substance?

A

A substance that is made up of only one type of particle.

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3
Q

Is water a pure substance?

A

Yes

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4
Q

What is a mixture?

A

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

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5
Q

What is a homogeneous mixture?

A

A mixture that has uniform composition and properties throughout.

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6
Q

What is a heterogeneous mixture?

A

A mixture that does not have uniform composition and properties throughout.

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7
Q

Is air a homogeneous mixture?

A

Yes

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8
Q

Is sand and water a heterogeneous mixture?

A

Yes

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9
Q

What is a solution?

A

A homogeneous mixture of two or more substances.

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10
Q

What is a solute?

A

The substance that is dissolved in a solution.

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11
Q

What is a solvent?

A

The substance in which the solute is dissolved in a solution.

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12
Q

What is a suspension?

A

A heterogeneous mixture in which solute particles do not dissolve but remain suspended in the medium.

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13
Q

What is a colloid?

A

A homogeneous mixture in which solute particles do not settle down.

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14
Q

What is a physical change?

A

A change in which the form of matter changes but its chemical composition remains the same.

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15
Q

What is a chemical change?

A

A change in which one or more substances are converted into new substances with different properties.

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16
Q

Is boiling of water a physical change or a chemical change?

A

Physical change

17
Q

Is rusting of iron a physical change or a chemical change?

A

Chemical change

18
Q

What is distillation?

A

A process of separating the components of a liquid mixture by heating and cooling.

19
Q

What is chromatography?

A

A technique used to separate the components of a mixture based on their different affinities towards a stationary phase.

20
Q

What is sublimation?

A

The process of changing a solid directly into a gas without passing through the liquid state.

21
Q

What is crystallization?

A

The process of formation of crystals from a saturated solution.

22
Q

What is evaporation?

A

The process of changing a liquid into vapor at a temperature below its boiling point.

23
Q

What is filtration?

A

A technique used to separate an insoluble solid from a liquid by passing the mixture through a filter.

24
Q

What is a pure substance made up of?

A

Only one type of particles

Sci 1 (3 decks)

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