Fall Final Exam Review

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Fall Final Exam Review. Scientific Method. 1- Which of the following is the most important thing with regard to protecting your eyes while in a science laboratory? Never look directly into a light source. - PowerPoint PPT Presentation

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<ul><li><p>Fall Final Exam Review</p></li><li><p>Scientific Method1- Which of the following is the most important thing with regard to protecting your eyes while in a science laboratory?Never look directly into a light source.If you get a chemical in your eyes, immediately go to an eyewash station and flush your eyes and eyelids for 15 minutes.Always wear safety goggles while performing laboratory work, including cleanupDo not wear contact lenses while in the lab.</p></li><li><p>Scientific Method (Continue)1- The observation that the sun sets in the west would be considered.a. a scientific law.c. a scientific modelb. a scientific theoryd. an inference (conclusion)2- A series of orderly steps used to solve problems isa. the experimental process.c. the scientific theory.b. A procedure.d. the scientific method.</p></li><li><p>Scientific Method (Continue)1- Which question cannot be answered by experimentation?Does penicillin kill Salmonella bacteria?Is rabies caused by a virus?Did a comet kill the dinosaurs?Can radiation cause cancer?2- Before beginning an experiment, you should always ______.a. mix all the solutions togetherc. weigh all substancesb. read all instructionsd. answer pre-lab questions</p></li><li><p>Scientific Method (Continue)Scientists wished to determine if a new type of antibiotic, called Antibiotic F, was effective against a particular type of bacteria that causes pneumonia. To test the antibiotic, the scientists enlisted 100volunteers, who were all suffering from pneumonia. The scientists gave 50 of the volunteers Antibiotic F for 10 days. The remaining 50 volunteers were given a sugar pill (called a placebo) that looked like the antibiotic. A volunteer was considered to be cured when their temperature remained normal (37oC) for three days.</p></li><li><p>Scientific Method (Continue)1- What problem was being investigated by the scientists?Is pneumonia caused by bacteria?Is Antibiotic F effective against pneumonia causing bacteria?How many people can be cured of pneumonia?How many days does it take to cure pneumonia?2- What was the experimental group?The bacteria.The volunteers that received the antibiotic.The volunteers that received the placebo.The sugar pill.3- Was there an experimental control (group)?NoYes, the bacteria.Yes, the volunteers that received the antibiotic.Yes, the volunteers that received the placebo (sugar pill).</p></li><li><p>Scientific Method (Continue)1- What type of observation is The water temperature is 25oC?Subjectiveb. Qualitative c. Quantitatived. Vector2- Scientist test a hypothesis by a. formulating questions.c. designing models.b. performing experiments.d. drawing conclusions.3- The metric unit for volume of a fluid isliters b. meters c. gramsd. cubic centimeters (cm3)</p></li><li><p>Scientific Method (Continue)1- The figures to the right represents a graduatedcylinder before and after an objectwas placed in it. What is the volumeof the object?14 cm315 ml20 ml24 cm3</p></li><li><p>Scientific Method (Continue) 25Graph #1 The relationship between time and and the temperature of a sodium 20 bicarbonate solution. Temperature 15 10 5 0 2 4 6 8 10 12Time1- In a graph, the independent variable isTemperatureTimeSodium bicarbonateDecreasing (going down)2- An appropriate interpretation of the data in the graph isAs time decreases, the temperature decreases and then remains the same.As time increases, the temperature goes down.As the temperature goes down, the time increases.As time increases, the temperature goes down and then remains the same.</p></li><li><p>Density (Continue)2- A block of maple wood with a volume of 405 cubic centimeters and a density of 0.67 g/cm3 is sawed in half. The density of the two smaller blocks is now A one-fourth the original densityB one-half the original densityC two times the original densityD the same as the original density</p></li><li><p>Density1- The density of a 10.0 gram liquid that has a volume of 5 ml is ________.a. 20 g/mlc. 5 g/mlb. 2 g/mld. 0.5 g/ml2- Methanol has the density of 0.79g/ml. How much would be the mass of 589ml of methanol?mass = density x volume = 0.79 g/ml x 589 ml = 465.31g3- Copper has the density of 8.90 g/ml. What would be the volume of 746g sample of copper?volume = mass/density= 465.31g/(8.90g/ml)=52.28ml4- Calculate the density of a solid, knowing that the mass is 123.4g and the volume is 14.3ml.Density= mass/volume = 123.4g/14.3ml = 8.63g/ml5- the tendency of a less dense object to float in a more dense liquid is calledviscositydensitysublimationbuoyancy</p></li><li><p>Density (Continue)1- Swimmers find that they can float more easily in the ocean than in a freshwater pond. The most likely reason for this phenomenon is that the A viscosity of pond water is greater than that of ocean waterB density of ocean water is higher than that of pond waterC temperature of pond water is lower than that of ocean waterD mass of ocean water is greater than that of pond water</p></li><li><p>Density (Continue)</p></li><li><p>1- The resistance of a fluid to flow is referred to as a. Pressureb. energyc. Viscosityd. shape</p><p>Viscosity</p></li><li><p>Heating Curve of water</p></li><li><p>Bonding 1. What kind of chemical bond is formed when electrons are transferred from one atom to another?Covalentb. ionicc. metalllic d. transition2. In the formula Fe2O3, what is the oxidation number for iron?a. 3+b. 4+/-c.3-d. 2+3. A group of atoms that acts as one charged atom is a ______.a. Moleculec. positive ionb. negative iond. polyatomic ion4. The formula for Calcium Carbonate is ________ . a. CCa4b. C2CO3c. CaCO3d. Ca3OH</p></li><li><p>Bonding (Continue)1- The name for Ca(OH)2 is ________.a. calcium hydroxidec. hydroxide calciumb. calcium oxygen hydrogen d. calcium dihydroxide2- The name for CCl4 is ________.a. carbon tetrachloridec. carbon chlorideb. carbon chlorined. chlorine carbon3- What type of bond does the chemical compound KCl contain?a. ionicc. both ionic and covalentb. covalentd. polar</p></li><li><p>Bonding (Continue)1- Water is a polar molecule because it ______.shares electronsshares electrons unequally transfers electronstransfers electrons unequally </p></li><li><p>Periodic table</p></li><li><p>Periodic Table (Continue)1-The element Magnesium is classified as aNobel gasb. Transition metal c. Alkaline-Earth metald. Halogen2- What do elements H, Na, and Li all have in common?a. They have one valence electron.c. They belong in same period.b. They commonly form covalent bonds.d. They take electrons during bonding.3- Elements in groups 3 12 on the periodic table are called ______.a. metalloidsc. nonmetalsb. transition metalsd. ions4- Hydrogen is grouped with the alkali metals because it ______.a. is a metalc. is a gasb. has one valence electrond. does not easily form compounds</p></li><li><p>Periodic Table (Continue)1- Atoms of the same element with different numbers of neutrons are called ______.a. groupsc. clustersb. Isotopesd. ions2- Antimony (Sb) is a ______.a. metalc. metalloidb. nonmetald. transition meta</p></li><li><p>Periodic Table (Continue) 1- Substances that conduct electric current under certain conditions are most likely ______.metalsb. metalloidsc. nonmetalsd. noble gases2-What is the oxidation number for Silicon?3+b. 4+/-c. 3-d. 2+3- Where are metals found on the periodic table?a. left sidec. along the staircaseb. right sided. at the bottom4- Horizontal rows on the periodic table are called ______.a. groupsc. clustersb. familiesd. periods5- What kind of chemical bond occurs when atoms share electrons?a. covalentb. metallicc. ionicd. mixed</p></li><li><p>Periodic Table (Continue)1- Which element has 35 protons?a. chlorinec. argonb. bromined. iodine2- A certain atom has 92 protons, 92 electrons and 146 neutrons. Its mass number is ______.a. 184c. 238b. 146d. 544- How many electrons are needed in the outermost energy level of most atoms to be chemically stable?a. 2 b. 6c. 8d. 105- Group 17 on the periodic table is known as the ______.a. alkaline earth metalsc. halogensb. alkali metalsd. noble gases</p></li><li><p>Periodic Table (Continue)Which of the following is NOT a property of nonmetals?can be solids, liquids or gasesc. dullconduct electricityd. brittleThe nucleus of an atom contains the ______.protons onlyc. protons and neutronsneutrons onlyd. protons and electronsThe chemical symbol for Potassium is ______.a. Pb. Kc. Pod. PtWhich of the following is NOT a characteristic of metals?are shinyc. brittleare malleabled. conduct electricity</p></li><li><p>Chemical Reactions1- What type of reaction is 2KCl 2K + Cl2?a. synthesisc. single replacementb. decompositiond. double replacement2- What type of reaction is 3NaOH + FeCl3 NaCl + Fe(OH)3?a. Synthesisc. single replacementb. Decompositiond. double replacement3- What type of reaction is 2KCl 2K + Cl2?a. Synthesisc. single replacementb. Decompositiond. double replacement</p></li><li><p>Rock Cycle</p></li><li><p>Rock Cycle (Continue)</p><p>rock cycle</p></li><li><p>Rock Cycle (Continue)</p></li><li><p>Chemical Reactions (Continue)</p></li><li><p>Chemical Reactions (Continue)1- A chemical reaction in which energy is released is ______.a. exothermicc. flammableb. endothermicd. decomposing</p><p>2- Each substance on the left side of the arrow in a chemical equation is a ______.reactantb. catalyst c. productd. inhibitor3- Coefficients (the numbers in front of) the chemical formulas in a chemical equation showthe number of atoms of each element.the number of molecules.the number of reactants.the number of products.4- Subscripts represent the number of atoms of each element.the number of molecules.the number of reactants.the number of products</p></li><li><p>Chemical Reactions (Continue)1- Which of the following shows a correctly balanced chemical equation for the following reaction? a. 2 Mg + O2 MgO c. Mg + 2 O2 MgOb. 2 Mg + O2 2 MgO d. 2 Mg + 2 O2 2 MgO2- When one element displaces another element in a compound, this reaction is a ______.a. synthesisc. single replacementb. decompositiond. double replacement</p></li><li><p>Chemical Reactions (Continue)1- According to the law of conservation of mass, how much zinc was present in the zinc carbonate? A 40 gB 88 gC 104 gD 256 g</p></li><li><p>Properties of Matter1- The image that represents a solid is _____ .a. Ab. Bc. Cd. None of the above.2- The phase that possesses the greatest amount of energy would be ______.a. Ab. Bc. Cd. None of the above3- Most matter ______ when heated.a. condensesb. expandsc. contractsd. solidifies</p></li><li><p>Properties of Matter (Continue)1- As a sample of matter is cooled, its particles ______.a. move more slowlyc. do not changeb. move more quicklyd. stop moving2- The change of state in which a gas changes into a liquid is ______.a. meltingb. sublimationc. freezing d. condensation3- Vaporization refers to the phase change froma. liquid to gas.c. solid to liquid.b. gas to liquid.d. liquid to solid.4- All matter is made up of tiny particles that are in constant motion is known as ______.a. law of conservation of massc. kinetic theory of matterb. law of conservation of energyd. archimedes principle</p></li><li><p>Properties of Matter (Continue)1- Which of the following is not a physical property of matter?a. massb. colorc. densityd. flammability2- Ice (solid water) floats becausea. it is more dense than water.b. it is less dense than water.c. it is the same density as water. d. it has fewer total particles than water.</p></li><li><p>Properties of Matter (Continue)</p><p> E D</p><p> B C A Heat Energy</p><p>1- What portion of the diagram represents a solid? a. Ab. Bc. Cd. De. E2- What line segment represents vaporization? a. Ab. Bc. Cd. De. E3- If heat energy were being removed from the substance in the diagram, Line Section B would represent a. a solid.b. condensationc. melting. d. freezing. </p></li><li><p>Properties of Matter (Continue)What happens to the temperature of a substance while it is undergoing a phase change?it increasesc. it stays the same until the change is completeit decreasesd. nothingThe particles in a solid move ______ than particles in a gas (at the same temperature).more quicklyc. the samemore slowlyd. depends on the substance</p></li><li><p>Properties of Matter (Continue)Which of the following is a CHEMICAL property?Colorc. densitymelting pointd. ability to rustWhich of the following is a PHYSICAL change?rustingb. evaporatingc. burningd. corrodingWhich of the following is a homogeneous mixture?a. water.c. isopropyl (rubbing) alcohol.b. italian salad dressing.d. grape kool-aid4. Which one of the following represents a correctly balanced equation for the following equation? KI + Br2 KBr + I22 KI + 2 Br2 2 KBr + I2c. 2 KI + Br2 2 KBr + I22 KI + Br2 2 KBr + 2 I2d. 3 KI + Br2 3 KBr + I2</p></li><li><p>Properties of Matter (Continue)The change of state in which a liquid changes into a solid is ______.Evaporationc. meltingFreezingd. sublimation2. The color of ink is a ______.chemical propertyc. chemical changephysical propertyd. physical change3. Smoke is an example of a ______.colloid b. suspensionc. solutiond. molecule4. Temperature is a measure of a. how hot or cold something is.c. degrees Celsiusb. particle motion.d. cubic centimeters (cm3)</p></li><li><p>Properties of Matter (Continue)Which of these is NOT homogeneous?a. a compoundc. a solutionb. an elementd. a suspension</p><p>the law of the conservation of mass states that mass cannot be Burnedb. changed in formcreated or destroyedd. heated or cooled during a chemical or physical change, energy may be</p><p>a.created c. destroyed b. greatly increased in strengthd.converted into another form</p><p>4. all changes of the state of matter requireWaterb. vibrationc.Energyd. sublimation</p></li><li><p>Properties of Matter (Continue)1- you burn a log of wood and only a small pile of ashes is left, what has happened?a large amount of mass has been losta small amount of mass has been turned into a large amount of heat energythe total amount of wood and oxygen is the same as the amount of ash and gasesthe total amount of energy is less than before2- knowing the chemical properties of a substance will tell you how the substanceLooksc. can be broken down into atomsSmelld. reacts with other substances3- which of the following is an example of physical changedissolving salt in waterc. cooking an eggburning wood into charcoald. rusting iron4- ice floats in water because it ismore dense than waterc. colder than waterless dense than waterd. warmer than water</p></li><li><p>Properties of Matter (Continue)1- which of the following is not an example of a physical property?freezing pointc. reactivityboiling pointd. density2- which of the following is an example of chemical change?ice meltingc. pounding gold into a coinpaint fadingd. a puddle of water evaporating3- digesting food is an example ofphysical changec. chemical changechange of stated. physical change4- grinding quartz crystals down to produce sand is an example of achange in statec. chemical reactionchemical change d. physical change</p></li><li><p>Properties of Matter (Continue)1- The smallest unit of a substance that behaves like a substance is an elementc. a moleculean atomd. a compound2- The kinetic theory states that the higher the temperature, the faster thethe particles that make up the substance movebonds between atoms breakmolecules of gas rush together the lighter particles within a substance clump together3- you put on gram of salt in one liter of water and sti...</p></li></ul>