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Grade 8 Science > mix and flow of matter vocab > Flashcards

mix and flow of matter vocab Flashcards

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1
Q

Scientfic Method: List the steps

A
  1. Observation - ask a question
  2. Hypothesis - make a prediction
  3. Expierement - Test your theory
  4. Conclusion - Record your result
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2
Q

What is a Fluid?

A

matter that has no fixed shape, can flow and take the shape of its container

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3
Q

What is a Pure Substance?

A

substance thats made of only one type of matter and has one particle throughout

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4
Q

What is a Mixture?

A

2 or more pure substances combined

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5
Q

What is a mechanical mixture?

A

heterogenous mixture; different substances can be seen

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6
Q

What is a Homogenous Mixture?

A

mixture where the different substances cannot be seen (it looks like one substance)

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7
Q

What is a Solution?

A

homogenous mixure, 2 or more substances that look like one

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8
Q

What is a solute?

A

substance that dissolves in a solvent to form a solution

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9
Q

What is a solvent?

A

substance that dissolves a solute

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10
Q

What is concentration?

A

amount of solute dissolved in amount of solvent (not in quiz 1)

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11
Q

What is a saturated solution?

A

solution in which no more solute can be dissolved in at a certain temp

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12
Q

What is a unsaturated solution?

A

solution in which more solute can be added in at a given temp

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13
Q

What is solubility?

A

ability to dissolve

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14
Q

What is a saturation point?

A

point at which no more solute can be dissolved in at a given temp

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15
Q

What is a aqueous solution?

A

water is the solvent

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16
Q

What is viscosity?

A

the liquids internal resistance/friction that keeps it from flowing

17
Q

What is density?

A

mass per unit of volume; calculated by dividing mass by volume

18
Q

What is buoyant force?

A

upwards froce that a fluid exerts on an object; opposite to gravity in a fluid

19
Q

What are the PMOM rules?

A
  1. all matter is made of tiny particles
  2. Particles are always moving and vibration
  3. particles in matter may be attracted to eachother or bonded together
  4. particles have space in between them
20
Q

What is the reason behind something floating?

A

when the density of the object is less than the density of the liquid

21
Q

What is the reason behind something sinking?

A

when the density of the object is greater than the density of the liquid

22
Q

How to calculate density?

A

Density = (g/ml) = mass/volume

23
Q

What is Buoyancy?

A

tendancy of an object to float when placed in a fluid

24
Q

What is high viscosity?

A

slow moving and doesn’t flow as easily (more dense)

25
Q

What is low viscosity?

A

fast moving and flows easily (less dense)

26
Q

What are elements?

A

substance that can’t be broken down

27
Q

What are compounds?

A

2 or more elements

Grade 8 Science (2 decks)

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