- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
##### Presentation Transcript

2. 1 What is the density of this magnetic steel alloy? A 2.67 g/mL B 3.99 g/mL C 6.90 g/mL D 8.01 g/mL

3. 2 Dr. Julian’s foam was most successful in extinguishing oil fires. What are the most likely physical characteristics of this foam? A Less dense than oil and does not allow oxygen in B Waterproof and contains flammable materials C More viscous than water and lighter than air D Brightly colored and more porous than plastic

4. 3 A sample of an element has a volume of 78.0 mL and a density of 1.85 g/mL. What is the mass in grams of the sample? Record and bubble in your answer to the nearest tenth on the answer document.

5. 4 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 density B one-half the original density C two times the original density D the same as the original density

6. 5 This pipette is filled with a 20% NaOH solution. The solution is at 20°C and has a density of 1.23 g/mL. According to this information, what is the mass of this NaOH solution? A 3.88 g B 15.7 g C 23.9 g D 24.6 g

7. 6 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 water B density of ocean water is higher than that of pond water C temperature of pond water is lower than that of ocean water D mass of ocean water is greater than that of pond water

8. 7 Compared to 250 g of gaseous nitrogen, 250 g of liquid nitrogen has greater — A volume B temperature C mass D density

9. 8 The picture shows the results of pouring a blue liquid into a clear liquid and allowing the mixture to settle for 25 minutes. Compared to the clear liquid, the blue liquid is more —A massiveB denseC viscousD soluble

10. 9 The table shows properties of four liquids that are insoluble in water. If the four liquids are poured into an Erlenmeyer flask containing water, which liquid will form a layer below the water?A QB RC SD T

11. 10 A 500 mL quantity of vanilla ice cream has a mass of 400 grams. The manufacturer then bubbles air into the ice cream so that its volume increases by 300 mL. What is the ice cream’s approximate final density? F 0.30 g/cm3 G 0.50 g/cm3 H 0.80 g/cm3 J 1.30 g/cm

12. 11 A bar of soap produced by this soap-making process normally sinks to the bottom of a container of water. Which of these processes could cause the bar of soap to float in water? A Making grooves in the surface of the thick paste B Adding air bubbles to the thick paste C Letting the thick paste sit for four days D Chilling the mold filled with the thick paste

13. 12 As the viscosity of a liquid increases, the liquid — A conducts electricity B pours more slowly C evaporates more quickly D forms a precipitate

14. 13 Water normally boils at 100°C at sea level and at 97°C on a North American mountaintop. This difference in boiling points can be explained by the difference between the locations’— A ultraviolet light B air pressure C gravitational force D thermal energy

15. 14 The buoyant force that a fluid exerts on objects is increased when there is an increase in the fluid’s — F acidity G clarity H solubility J density

16. 15 The observation that an air bubble in water rises to the surface is explained by the principle of — A viscosity B buoyancy C interference D polarity

17. 16 Brown sugar consists of crystals of white sugar coated with molasses. If brown sugar hardens, it can be softened by heating. The most likely reason brown sugar softens when heated is that heat — A increases the moisture of sugar B decreases the volume of molasses C increases the density of sugar D decreases the viscosity of molasses

18. 17 A heat decomposes the compound B the elements are volatile C pressure increases D their ionic bond is broken

19. 18 The correct formula for calcium chloride is — A CaCl B CaCl2 C Ca2Cl D Ca2Cl3

20. 19 Which of the following groups contains members with similar chemical reactivity? A Li, Be, C B Be, Mg, Sr C Sc, Y, Zr D C, N, O

21. 20 According to the periodic table, which element most readily accepts electrons? A Fluorine B Nitrogen C Arsenic D Aluminum

22. 21 Elements in Group 16 of the periodic table usually — F form large molecules G gain electrons when bonding H act like metals J solidify at room temperature

23. Al3+ SO42– 22 According to this information, what is the chemical formula for aluminum sulfate? A AlSO4 B Al2(SO4)3 C Al3(SO4)2 D Al6SO4

24. Calcium (Ca2+) + Chloride (Cl–) → Calcium chloride 23 The chemical formula for calcium chloride is — F Ca2Cl G CaCl H CaCl2 J Ca2Cl3

25. 24 An unidentified element has many of the same physical and chemical properties as magnesium and strontium but has a lower atomic mass than either of these elements. What is the most likely identity of this element? F Sodium G Beryllium H Calcium J Rubidium

26. 25 The elements from which of the following groups are most likely to react with potassium (K)? F Group 2 G Group 7 H Group 13 J Group 17

27. 26 The elements of which of these groups on the periodic table are most resistant to forming compounds? A Group 1 B Group 9 C Group 14 D Group 18

28. 27 The bonding characteristics of oxygen are most similar to the bonding characteristics of —A hydrogenB siliconC heliumD sulfur

29. 28 Which of these elements is most likely to donate one electron?F BeG CsH RnJ He

30. 29 Alpha particles are one type of radioactivity. These particles have a nucleus of two protons and two neutrons but have no orbital electrons. Based on this information, it can be inferred that alpha particles are positive ions of the element —F actiniumG curiumH radiumJ helium

31. 30 A certain atom has a nucleus containing six protons and eight neutrons and has six electrons orbiting the nucleus. This atom is a form of the element —A siliconB carbonC magnesiumD calcium

32. 31 Calcium ions play an important role in the function of neurons in the brain. Elements that are chemically similar to calcium can interfere with the function of neurons. Which of the following is most likely to imitate calcium’s role in the function of neurons? F Sodium G Potassium H Strontium J Rubidium

33. o=x=o 32 The model above shows how an unidentified element, X, forms covalent bonds with oxygen. In which group on the periodic table does Element X most likely belong? F Group 6 G Group 12 H Group 14 J Group 18

34. 33 In which model of the periodic table does the shaded area show the location of elements that require the least energy to lose one electron? A C B D

35. 34 The ionic compounds that result from combining Group 2 and Group 16 elements have a 1:1 ratio because — A Group 2 elements are electrically neutral B Group 2 elements have two valence electrons C Group 2 elements contain neutrons in the nucleus D Group 2 contains more elements than other groups

36. 35 Silver bromide is a type of halide. Elements from which group in the periodic table are necessary to form halide compounds? A Group 4 B Group 5 C Group 10 D Group 17

37. 36 Elements found in which shaded area of this periodic table undergo the fewest chemical reactions? A Q B R C S D T

38. 37 According to the periodic table, which of these elements will form an ion with a –2 charge? F S G Mg H F J Rb

39. 38 The diagram shows physical changes that occur in the water cycle. Which of these shows condensation? A Q B R C S D T

40. 39 Which process in the rock cycle is most likely responsible for moon rocks being converted to lunar soil? A Metamorphism B Weathering C Sedimentation D Volcanism

41. 40 Which of these changes in rocks is a physical change? A Acid rain damaging marble B Iron in rock combining with oxygen to form hematite C Carbonic acid weathering limestone D An ice wedge shattering a slab of shale

42. 41 Which of the following processes is an example of a physical change associated with an oak tree? A Decomposition of bark by bracket fungi B Starches and sugars being broken down during energy production C Water and carbon dioxide being converted to glucose D Evaporation of water from the surfaces of leaves

43. 42 Compounds with the same chemical composition may have different densities because they —A have differences in reactivityB are able to bond with oxygenC vary in solubilityD exist in different phases

44. 43 Limestone is a sedimentary rock consisting mostly of calcium carbonate (CaCO3). Which process is most likely to cause a chemical change to limestone? F Freezing water cracking limestone G Flowing water eroding a limestone riverbed H Acid rain forming puddles on limestone J Coastal waves dissolving limestone sediments

45. 44 Which of the following is an example of a chemical change? A Combustion of gasoline B An apple being bitten C An ice cube being swallowed D Absorption of a water molecule

46. How Portland Cement Is Made 45 Portland cement is used to make concrete, a very common construction material. Which step in the production of portland cement causes a chemical change? A W B X C Y D Z

47. 46 Which of the following describes a chemical change that J. B. van Helmont could have observed? F Limestone combined with an acid produces a gas. G Solid carbon dioxide becomes a gas at room temperature. H Limestone combined with sand results in a mixture. J Diluting an acid with water produces a solution.

48. 47 Which process best demonstrates a chemical change in distilled water? A Freezing the water B Separating the water into its elements C Calculating the water’s density D Dissolving sugar in the water

49. 48 Which of these describes a chemical change? F Frost disappears from a window in the morning. G A decrease in temperature reduces the volume of a gas. H Soot is formed as a candle burns. J A cup of hot tea cools down.

50. 49 In photography, which of these is an example of a chemical change? F Light being refracted by a camera lens G Adjusting a lens to focus light H Halide granules being activated by light J Allowing a certain wavelength of light into the camera