Benchmark review 2014 Elements vs Cmpunds: 1. What is the difference between an element and a cmpund? Element = a pure substance Cmpund = 2 r mre elements chemically cmbined 2. What are elements represented by n the Peridic Table? Symbls 3. Identify the fllwing as either an element (E) r a cmpund (C): a. H 2SO 4 C b. H 2O 2 C c. Ne E d. al N e. O 2 E 4. Circle the fllwing characteristics that describe an element: a. Mixture b. Different atms chemically bnded tgether c. A pure substance d. Same atms 5. Can cmpunds be brken dwn int simpler substances? Yes 6. Can elements be brken dwn int simpler substances? NO! 7. Julian was eating a bag f candy at the mvie theater. In this bag there were Sur Patch Kids, Skittles, and peanuts. Why wuld Julian s bag f candy NOT be cnsidered a cmpund? B/c it is a mixture and can be easily seperated 8. Identify the fllwing pictures as either an element r cmpund: Element Cmpund Cmpund Element Chemical vs. Physical Changes: 9. What are the 5 signs f a chemical change? a. New Substance Frmed b. Temp Change c. Clr Change d. Gas given ff (bubbles) e. Fire
10.What is a precipitate? When yu mix 2 r mre liquids and a slid frms 11.What is a physical change? A change that just alters the appearance f a substance; can be reversed 12.What is a chemical change? A change that creates a new substance; cannt be reversed 13.Label the fllwing changes as either chemical r physical: a. Burning Paper C b. Tearing Paper P c. Melting Ice Cream P d. Mwing yur Lawn P e. Alka Seltzer in Water C 14.When cnducting an experiment, Lauren fund that when yu add Idine t a cracker, the cracker changes clr. Is this a chemical r physical change? Hw d yu knw? Chemical clr change 15.Katrina was cnducting an experiment with 2 unknwn liquids. When she mixed them tgether a white slid frmed in the beaker. What type f reactin is this? Hw d yu knw? Chemical new substance frmed (precipitate) Metals/Nn-Metals/Metallids: 16.List 4 prperties f metals: a. Malleable b. Ductile c. Gd Cnductr d. High Luster 17.List 3 prperties f nn-metals: a. Pr Cnductr b. Brittle c. Lw Luster 18.What is a metallid? Has prperties f metals and nn-metals, and is a semi-cnductr f electricity 19.Where are the fllwing lcated n the Peridic Table? a. Metals = left side f zig zag line b. Nn-Metals = right side f zig zag line c. Metallids = n zig zag line 20.When cnducting an experiment w/ an unknwn substance, Vanessa fund that when tuched with electrical wires nthing happened, the substance was nt shiny, and brke easily. Hw wuld she classify this substance? Nn-Metal
21.Hunter was experimenting with several different substances and was trying t classify them based n their prperties. Substance A brke easily, was shiny and when he tuched electrical wires t the substance the light bulb lit up very dimly. Hunter bserved that substance B was dull, brke easily when he tried t bend it, and did nt cnduct electricity. Substance C was shiny, cnducted electricity and did nt break when hammered. Substance A = Metallid Substance B =Nn-Metal Substance C = Metal Using the chart pictured belw, answer questins 22-24: 22.Which element(s) in the chart are cnsidered metals? Titanium & Ptassium 23.Which element(s) in the chart are cnsidered nn-metals? Selenium 24.Which element(s) in the chart are cnsidered metallids? Plnium Ptential vs Kinetic Energy: 25.What is ptential energy? Stred energy (energy nt in mtin) 26.What is kinetic energy? Energy in mtin 27.Where d we have the mst ptential energy in the picture abve? B 28.Where d we have the mst kinetic energy in the picture abve? D
29.List the pints in rder f increasing kinetic energy. B, C, F, E, A, D 30.List the pints in rder frm mst ptential t least ptential. B, C, F, E, A, D 31.What is the law f cnservatin f energy? Energy cannt be created r destryed 32.Hw wuld I increase the amunt f ptential energy that Wiley Cyte has in the picture? Increase the height f the cliff Heat Transfer (Cnductin, Cnvectin, Radiatin): 33.What is cnductin and give an example? Transfer f heat thrugh tuch (tuching a ht stve) 34.What is cnvectin and give an example? Transfer f warm air up and cl air dwn (the reasn it is typically warmer upstairs) 35.What is radiatin and give an example? The transfer f heat thrugh empty space (sitting ut in the sun) 36.Hw is heat transferred? Warmer t clder r clder t warmer 37.Wyatt decided that he wanted t buy a lt f churrs fr Science class. He kept them heated by leaving them under these lamps. Hw is the heat being transferred frm the lamps t the tp f the churr pile? Radiatin 38.Hw are the churrs in the middle f the pile receiving heat? Cnductin (they re tuching the tp layer f churrs) 39.Maddy was making a pt f macarni fr dinner. While she was cking Ashley walked in and distracted her and Maddy spilled the pt f biling water all ver herself (OUCH!!!!). Hw was the heat transferred when the water spilled? Cnductin 40.What causes warm air t rise and cl air t sink? Density (warm air is less dense) 41.Why wuld we place a heater n the flr rather than up high? B/c warm air rises (Cnvectin)
42.Oscar was enjying a glass f cl water when all f a sudden Jaylin ran up and put a ht rck in his water. What is ging t happen t the temperature f the water and the rck? Water Temp = Increases (htter) Rck Temp = Decreases (cler) Energy Transfrmatins: 43.A lamp that plugs int a wall scket draws energy which flws thrugh a thin wire in the bulb causing it t glw. What energy transfrmatins are taking place? Electrical Light Thermal 44.What type f energy des a battery have? Chemical 45.What is the Law f Cnservatin f Energy? Energy cannt be created r destryed 46.Lking at the picture f the circuit belw, what transfrmatin is taking place t light up the light bulb? Chemical Electrical Light 47.Using the picture frm 46, what culd we change t make the light bulb brighter? Add anther battery 48.Peple get energy frm the fd that they eat and transfrm that energy as they mve. Which energy transfrmatins ccur as a student eats and then rapidly rubs the palms f their hands tgether? Chemical mechanical thermal 49.When energy changes frm, des the riginal frm f energy disappear? NO Inclined Planes & Pulleys: 50.The pulley pictured belw is a _mveable pulley. When using this pulley the amunt f frce decreases and the directin the lad mves stays the same.
51.The pulley pictured belw is a fixed pulley. When using this pulley the amunt f frce stays the same and the directin the lad mves changes. Advantages f Inclined Planes Decreases the amunt f frce needed Disadvantages f Inclined Planes Fixed changes directin f the frce applied Mveable decreases the amunt f frce 52.When using simple machines, the amunt f wrk always stays the same. 53.When using simple machines the weight/mass always stays the same. 54.Lking at the inclined plane belw, hw culd we increase the amunt f frce required t lift the balln up the ramp? Increase the height f the bks 55.Lking at the inclined plane frm #54, hw culd we decrease the amunt f frce required t lift the balln up the ramp? Decrease the height f the bks 56.Emily was trying t decide which pulley t use t help her lift a pian int her huse. Which pulley pictured shuld she use and why? 4 b/c it has the mst pulleys
Energy Resurces: 57.What des renewable mean? It is a resurce that we will always have 58.What des nn-renewable mean? It is a resurce that we will eventually run ut f 59.What are the 5 renewable resurces? a. Slar b. Hydrpwer c. Wind d. Gethermal e. Bimass 60.What are the 4 nn-renewable resurces? a. Cal b. Oil c. Natural Gas d. Nuclear Energy 61.What des energy cnservatin mean? Saving energy 62.Why wuld cal be cnsidered the best nn-renewable resurce t use? Because it is the cheapest and mst abundant nn-renewable resurce 63.What is bimass? Energy we get frm plants and animals 64.What is gethermal energy? Energy we get frm heat inside the earth 65.What is hydrpwer? Energy we get frm water 66.What is wind energy? Energy frm mving air that turns turbines 67.What is slar energy? Energy we get frm the sun 68.List 3 ways we can cnserve energy. Turn ff the TV when yu re nt using it, turn ff cmputer when we re nt using it, turn water ff when we re nt using it
Infrmatin abut yur test: This is a district written test. Yu will have tw class perids t cmplete this test which will be cunted as the secnd majr grade f the third six weeks. Yu will have a peridic table t use fr this test. Yu will need a pencil fr yur bubble sheet. The test is 26 multiple chice questins. This test cvers: 5 questins-knw that an element is a pure substance represented by chemical symbls and differentiate between elements & cmpunds 2 questins-identify the frmatin f a new substance by using the evident f a pssible chemical change (5 signs) 3 questins- cmpare metals, nnmetals & metallids using physical prperties such as luster, cnductivity r malleability 4 questins- knw the advantages and disadvantages f each f earth s energy resurces and hw we can better practice energy cnservatin 3 questins- cmpare and cntrast ptential and kinetic energy law f cnservatin f energy, ptential energy, kinetic energy, 3 questins- identify and describe the methds f thermal energy transfer (cnductin, cnvectin & radiatin), 2 questins- recgnize that thermal energy mves in a predictable pattern frm warmer t cler until all the substances attain the same temperature 2 questins- recgnize that energy is never created nr destryed, it simple changes frm THEN identify and describe varius energy transfrmatins 2 questins-investigate hw inclined planes and pulleys can be used t change the amunt f frce r directin f frce t mve an bject.