Name: Density Test TERM#3 SECTION A (MULTIPLE CHOICE) CIRCLE THE CORRECT ANSWER 1. The mathematical formula to use when calculating mass of an object is: a) volume divided density b) mass multiplied by volume c) density plus volume (^5) density multiplied by volume^ 2. Which of the following statements is true about a bottle containing liquids that appear to be stacked? ^ a) the liquid at the top is the most dense b) the liquid at the bottom is the least dense liuidatthe bottom is tiie most d) They are all equal in density 3. What I am solving for: Kg/cm3 x cm 3 (H) mass J b) volume c) density d)buoyancy ^
4. The density of water is Ig/mL An object has a mass of 45 grams. What volume must it have in order to float in water? a) 40 ml b) 44 ml d) 43 ml 5. Your friends at your lunch table all have different stuff in their lunch. Liquid A has a density of 1.07 g/ml, Liquid B has a density of 0.98 g/ml, Solid Chas a density of 1.12 g/mi, and Mush D has a density of 1 g/ml. You decide to make a gross combination of the four in your water bottle. Which order will they appear in, from bottom to top? a) Solid C, Mush D, Liquid. A^nd Liquid B on top? ^ Liquid A on top? (ca Solid C.LJguidA, MusE U, and Liquid b TirTtop'D c) Liquid A, Liquid B, Solid C, and Mush D on top? 6.. Mark each statement as True or False A. p-x^he liquids with the highest density floated at the top of the bottle, B.._Vv_yFh e correct metric unit for density.of a liquid is grams/pounds. C,. p/the weight of an object and its mass are always the same. D."_T^Fh.e air pressure at higher elevation is the same as the air at sea level. E _J ^j2tui/bones become more dense in space. F. Jr~h'TKe densities of pure water, salt water and suear water are always the same. G. JV^Buoyancy is the power of a fhmd to exert an upward force on a body placed m it SectionB Short Answers Answer each question using complete sentences. Describe 3 ways to calculate the volume of an object YOU can u^e r\n frtiprcbri rnn.o Or \/C;U CQD nrw^/fr/^rq v mass. Explain why the hdm/s in a sa/ad dressing bottle settled back into the same'order after they were shaken up. /. an p frofni nc^> 6 nens.y\i Ks Vm'n -0C t ^\twe vv's ovvjnaonjer.di^r^/liakipo.vgo'of top>» x' /. 9 ) Give an exampre of three objects that are close tcxrhe same size but very differenj/n J ^ n^ *~\ vts^ ~^ <^l.«vc>^xhf~-.ll -? \ &T^F
r 15. Two students are taking part in an experiment to determine the density of a piece of copper. Student A has apiece of copper that has amass of 20 g. He calculates his density to be 8.92 g/ml. Student B has apiece of copper that has a mass of 10 g. He also calculates his density to be 8.92 g/ml. Explain how both students with different masses of their copper sample calculated the same density 9 1.1) Discuss how aensity world discoveries? iljoq^^tlnenlaesn?i/if/ar> ^~J\J helped shape civilizations, fight wars, and lead to many amazing
12) Record the following volume for the picture below. Section C ( Density Problems) PLEASE SHOW ALL YOUR WORK AND DON'T FORGET YOUR UNITS" WARNING!!!!!!!! Failure to include units in your final answer will result in half the marks lost for that problem.. Answers (whether correct or not) with no work provided wih be awarded zero points. 13) A 300 mi sample of solution A has a mass of 240.6g, What is the density in g/ml 1*0 If blood has a density of 1.05 g/ml, how many liters of blood are donated if575 go f blood are given? - _
- ) The mass of an empty flask is 60 g. What is the volume of the flask filled with acetone (d = 0.102 g/ml] if the same flask weighs 75.2 g when filled with acetone 7 lc) Calculate the density for a rectangular block using the followrng measurements. Length: 10 cm, Width: O..QL1 m, Height: 15 cm, Mass: 65.2 g Show your work, A student has measured the mass of a rock as 50 g. To determine the volume, the student places the rock into 23 ml of water. The rock causes the level of water tojj^ejxy.^jnl. What is the density of the rock sample 1, A group of students collected 125 empty aluminum cans to take to the recycling center. If.21 cans make 1.0 pound of aluminum, how many tr^l, of aluminum (D=2.7Qg/cm 3 ) are obtained from ALL the cans? 2.7 0 «U&.VW cms or -
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C: KNOWLEDGE AND UNDERSTANDING OF SCIENCE : > ~ Maximum: 6 You should be able to demonstrate my understanding of science by applying scientific knowledge to construct scientific explanations, solve problems and formulate scientifically supported arguments. By the end of Cycle 1 you should be able to:.y* </ V recall scientific knowledge and use scientific understanding to construct scientific explanations; apply scientific knowledge and understanding to solve problems set in familiar and unfamiliar situations; critically analyse and evaluate information to make judgments supported by scientific understanding. Suitable assessment tasks for criterion C include: Tests, examinations, case studies, written responses and other assignments that combine a range of problems of different complexity, and Opportunities to make scientifically supported judgments. - NOTES: Describe: to give a detailed account Analyse: to identify parts and relationships and to interpret information to reach a conclusion, Complex problems: refers to problems that are set in a familiar or unfamiliar context and require analysis. These problems can often be. broken down jnto sub-problems or stages, each of which requires the selection and application of the appropriate principle, rule, equation or method. Unfamiliar situation: refers to a problem or situation ini which the context or the application is modified so that it is considered unfamiliar for the student; Simple problems: refers to straightforward problems that are clearly stated and set in a familiar context, and require the studentto apply the appropriate principle, rule, equatibh or method v Achievement level Level descriptor I do not reach a standard described by any of the descriptors below I recognize part of scientific knowledge but recall is limited. I identify simple scientific 1-2 information to solve problems in familiar situations only. I provide limited analysis, critical information, and limited comments on the validity and quality of the understanding of science. With guidance, I describe and recall most scientific knowledge related to the unit of work. 3-4 With guidance, I apply scientific information to solve problems in familiar situations. With guidance, I identify basic scientific ideas, concepts, and relationship with appropriate level of complexity to the given unit of work. - IB Standardized Assessments LCCHS 2011-2012
With guidance, I use scientific information correctly to construct explanations (Causes and reasons) which are consistent with the complexity of work covered. I analyze (ports and relationships) and evaluate (assess implications and limitations) information critically and make comments on the validity, quality, and relationship of the information supported by scientific understanding. I apply scientific understanding to solve complex problems including those in unfamiliar situations. IB Standardized Assessments LCCHS 2011-2012