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Grade 8: Science > Science Unit A: Section 2.0 > Flashcards

Science Unit A: Section 2.0 Flashcards

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1
Q

What is a mixture?

A

A mixture that has 2 or more substances

Ex. Soul

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2
Q

What is a mechanical or heterogenous mixture?

A

When you can see the different parts of a mixture

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3
Q

What is a solution or a homogenous mixture?

A

When you can’t see the different substances

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4
Q

What is a suspension?

A

A heterogenous mixture where the to substances float

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5
Q

What is a colloid?

A

A heterogenous mixture that needs an emulsion or else the particles will set because they are not bonded together

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6
Q

What is a paper chromatography test for?

A

A paper chromatography test can be used to determine if they are pure substances or solutions

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7
Q

What is the solute?

A

The substance that dissolves

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8
Q

What is the solvent?

A

The substance that does the dissolving

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9
Q

What is concentration?

A

It tells you the amount of solute dissolved in a specific amount of solvent

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10
Q

What is an unsaturated solution?

A

When a solute can still dissolve

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11
Q

What is a saturated solution?

A

When no more solute can dissolve

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12
Q

What is solubility?

A

The maximum amount of solute you can add to a fixed volume of solvent

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13
Q

What is an aqueous solution?

A

It means that the solvent is water

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14
Q

The solubility of solids and liquids increases as the…?

A

Temperature of the solvent increases

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15
Q

The solubility of a gas…?

A

Decreases as the temperature increases

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16
Q

The chart?

A 
Matter
                     /           \
            Mixtures     P.S
         /        |       \
Mechanical mixtures
Ex. Soul
Solution
Ex. Vinegar
Suspensions
Ex. Tomato juice
Colloids 
Ex milk
17
Q

What are the for parts to the particle model of matter?

A
  • All matter is made of tiny particles
  • The tiny particles are always moving
  • The particles may be attracted or bonded together
  • The particles have spaces between them
18
Q

What factors affect the rate of dissolving?

A
  • Temperature of the solvent
  • size of the pieces- because they have more surface area for the particles to bump into
  • Stirring so the particles bump into each other
19
Q

What is a pure substance?

A

A substance that is made of one type of matter

Ex. Tinfoil

20
Q

Why do substances dissolve?

A

Some particles may be more attracted to each other

Grade 8: Science (18 decks)

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