Jeopardy Start

Final Jeopardy Question Classigfying Matter DensityVariables Mixed Practice Mixture of Practice

10 Point Question Back to the Game Board Is Baking Soda (NaHCO 3 ) a homogeneous mixture, hetergeneous mixture, pure substance compound, or pure substance element? pure substance compound

20 Point Question Pure Substance Element Back to the Game Board Is oxygen (O 2 ) a homogeneous mixture, hetergeneous mixture, pure substance compound, or pure substance element?

30 Point Question Is sterling silver (7.5 % of other metals) a homogeneous mixture, hetergeneous mixture, pure substance compound, or pure substance element? Homogeneous Mixture Back to the Game Board

40 Point Question Is italian Salad dressing a homogenous mixture, hetergeneous mixture, pure substance compound, or pure substance element? Heterogeneous Mixture Back to the Game Board

10 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 g/mL Back to the Game Board

20 Point Question D = 0.5 g/cm³ V = ? M = 20 g 40 cm 3 Back to the Game Board

30 Point Question D = 3 g/mL V = 100 mL M = ? 300 g Back to the Game Board

40 Point Question A block of aluminum occupies a volume of L and weighs 40.5 g. What is its density? 2.70 g/cm 3 Back to the Game Board

10 Point Question Back to the Game Board What are the independent, dependent, and controlled variables in the following? Hypothesis: Bacterial growth increases exponentially as temperature increases. IV: Temperature DV: Bacterial growth CV: Temperature, amount of sunlight, Soil, time of day cared for…

20 Point Question Back to the Game Board 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 dropped DV: Free Fall CV: Person dropping the ball, height, timer, wind

30 Point Question Back 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 Concentrations DV: Performance lever CV: engine, speed of car, person driving the car…

40 Point Question Back 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 Mixtures DV: Performance lever CV: engine, speed of car, person driving the car…

10 Point Question What type of chemist studies the enzymes involved in building proteins in your body? Biochemist Back to the Game Board

20 Point Question My pants don’t fit because I am eating too much ice cream. Inference Back to the Game Board Is that a conclusion or inference?

30 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 Back to the Game Board

40 Point Question When ice melts is that an endothermic or exothermic reaction? Endothermic Back to the Game Board

10 Point Question Has sour milk undergone a chemical or physical change? Chemical Back to the Game Board

20 Point Question What is the mass of the ethanol that exactly fills a mL container? The density of Ethanol is.789g/ml 158 g Back to the Game Board

30 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 because energy is put in to speed up the particles. Back to the Game Board

40 Point Question Is a penny a homo/hetero mixture or a compound/element pure substance? Homogeneous Mixture Back to the Game Board

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.