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Final Jeopardy Question

Classigfying Matter Density Variables

Mixed Practice

Mixture of Practice

10 10 10 10 10

20 20 20 20 20

30 30 30 30 30

40 40 40 40 40

10 Point Question10 Point QuestionBack to the Game Board

Is Baking Soda (NaHCO3) a homogeneous mixture, hetergeneous mixture, pure substance compound, or pure substance element?

pure substance compound

20 Point Question20 Point Question

Pure Substance Element

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Is oxygen (O2)a homogeneous mixture, hetergeneous mixture, pure substance compound, or pure substance element?

30 Point Question30 Point Question

Is sterling silver(7.5 % of other metals)

a homogeneous mixture, hetergeneous mixture, pure substance compound, or pure substance element?

Homogeneous Mixture

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40 Point Question40 Point Question

Is italian Salad dressinga homogenous mixture, hetergeneous mixture, pure substance compound, or pure substance element?

Heterogeneous Mixture

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10 Point Question10 Point Question

A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm. the block

weighs 1587 g. From this information, calculate the density of lead.

11.3 g/mL

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20 Point Question20 Point Question

D = 0.5 g/cm³

V = ?

M = 20 g

40 cm 3

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30 Point Question30 Point Question

D = 3 g/mL

V = 100 mL

M = ?

300 g

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40 Point Question40 Point Question

A block of aluminum occupies a volume of 0.015 L and weighs 40.5 g. What is its density?

2.70 g/cm3

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10 Point Question10 Point QuestionBack to the Game Board

What are the independent, dependent, and controlled variables in the following?

Hypothesis: Bacterial growth increases

exponentially as temperature increases.

IV: TemperatureDV: Bacterial growthCV: Temperature, amount of sunlight, Soil, time of day cared for…

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In one student’s experiment, objects of the same mass but of different sizes and shapes were dropped from a given height. Their rates of free fall were measured and recorded.

What are the independent, dependent, and controlled variables in the following?

IV: Object being droppedDV: Free FallCV: Person dropping the ball, height, timer, wind

30 Point Question30 Point QuestionBack to the Game Board

What are the independent, dependent, and controlled variables in the following?

Note: the length of the elodea was

measured at the beginning of the experiment and after 10 days.

IV: Salt ConcentrationsDV: Performance leverCV: engine, speed of car, person driving the car…

40 Point Question40 Point QuestionBack to the Game Board

What should be the independent, dependent, and controlled variables in the following?

An engineer has created a new engine for race cars. It is necessary to know which fuel mixture will allow the engine to run at its peak performance.

IV: Different Fuel MixturesDV: Performance leverCV: engine, speed of car, person driving the car…

10 Point Question10 Point Question

What type of chemist studies the enzymes involved in building

proteins in your body?

Biochemist

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20 Point Question20 Point Question

My pants don’t fit because I am eating too much ice cream.

Inference

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Is that a conclusion or inference?

30 Point Question30 Point Question

If you were sinking in a fluid other than water, would you sink faster if it had a high viscosity or a low viscosity?

Low Viscosity

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40 Point Question40 Point Question

When ice melts is that an endothermic or exothermic reaction?

Endothermic

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10 Point Question10 Point Question

Has sour milk undergone a chemical or physical change?

Chemical

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20 Point Question20 Point Question

What is the mass of the ethanol that exactly fills a 200.0 mL container? The density of Ethanol is .789g/ml

158 g

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30 Point Question30 Point Question

On a particle level, describe what happens during sublimation. Is it

endo or exothermic?

The particles speed up and spread out. It is an endothermic reaction becauseenergy is put in to speed up the particles.

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40 Point Question40 Point Question

Is a penny a homo/hetero mixture or a compound/element pure substance?

Homogeneous Mixture

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Describe the law of conservation of mass and why that is important in chemistry.

You know that the mass on the left side of the equation is the same amount on the right side and so you can determine the mass with which you started or ended.