2. Jeopardy Chemical/Physical Changes Periodic Table Matter & Energy Reactions General Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy

3. $100 Question from H1 Which of these proves that photosynthesis involves a chemical change? A. Burning of wood B. Green color of plant leaves C. Survival of trees depends on water D. The fact that carbon dioxide forms other molecules

4. $100 Answer from H1 A. Burning of wood B. Green color of plant leaves C. Survival of trees depends on water D. The fact that carbon dioxide forms other molecules

5. $200 Question from H1 When a student mixes oxygen and hydrogen gas in a test tube, nothing seems to happen. However, when the student introduces an electric spark, the mixture "pops," and water forms on the inside of the test tube. What is the best evidence for this chemical change? A. Popping sound B. Use of electricity C. Formation of water D. Mixture of two gases

6. $200 Answer from H1 A. Popping sound B. Use of electricity C. Formation of water D. Mixture of two gases

7. $300 Question from H1 When a student lowered the temperature of a glass of water below 0°C, the water turned into ice. Later the student heated the ice and it turned back into water. Why must this be a physical change? A. The water is still water. B. The ice required heat to melt. C. The amount of water is still the same. D. The density of ice and water are different.

8. $300 Answer from H1 A. The water is still water. B. The ice required heat to melt. C. The amount of water is still the same. D. The density of ice and water are different.

9. $400 Question from H1 A student places a small piece of sodium in a beaker of water. The sodium begins to smoke, hiss, and jump across the surface of the water. In a few seconds, the sodium disappears. What is the best evidence that a chemical change occurred? A. Rapid movement B. Change of mass C. Creation of heat D. Generation of sound

10. $400 Answer from H1 A. Rapid movement B. Change of mass C. Creation of heat D. Generation of sound

11. $500 Question from H1 The table shown contrasts some properties observed of new and old nail material. Which of these statements best describes rust as compared with the original metal in the nails? A. An original substance that has changed phase B. A new substance that formed from a chemical change C. An original substance that has undergone a physical change D. A new substance that did not form from the original substance

12. $500 Answer from H1 A. An original substance that has changed phase B. A new substance that formed from a chemical change C. An original substance that has undergone a physical change D. A new substance that did not form from the original substance

13. $100 Question from H2 Which of these elements is usually in the form of a gas? A. Lead B. Neon C. Carbon D. Strontium

14. $100 Answer from H2 A. Lead B. Neon C. Carbon D. Strontium

15. $200 Question from H2 Which metal has properties that are the most similar to iron? A. Sodium B. Mercury C. Aluminum D. Manganese

16. $200 Answer from H2 A. Sodium B. Mercury C. Aluminum D. Manganese

17. $300 Question from H2 Helium and neon are grouped together on the Periodic Table because they — A. are gases. B. are elements. C. have the same mass. D. have the same number of protons.

18. $300 Answer from H2 A. are gases. B. are elements. C. have the same mass. D. have the same number of protons.

19. $400 Question from H2 Which characteristic of an element best explains how it behaves chemically? A. Atomic mass B. Atomic number C. Group classification D. Period classification

20. $400 Answer from H2 A. Atomic mass B. Atomic number C. Group classification D. Period classification

21. $500 Question from H2 Which element does not react naturally with other elements? A. Lead B. Neon C. Oxygen D. Potassium

22. $500 Answer from H2 A. Lead B. Neon C. Oxygen D. Potassium

23. $100 Question from H3 In the equation shown, what does the arrow represent? A. Heat is released. B. Energy is produced. C. A chemical change occurs. D. The elements are separated.

24. $100 Answer from H3 A. Heat is released. B. Energy is produced. C. A chemical change occurs. D. The elements are separated.

25. $200 Question from H3 The chemical formula of oxygen that exists in the atmosphere is O 2. What does the number "2" represent? A. Oxygen is a gas at room temperature. B. Two oxygen atoms are bonded together. C. Oxygen is on row two of the periodic table. D. Oxygen is the second most common element.

26. $200 Answer from H3 A. Oxygen is a gas at room temperature. B. Two oxygen atoms are bonded together. C. Oxygen is on row two of the periodic table. D. Oxygen is the second most common element.

27. $300 Question from H3 This chemical equation represents the burning of methane (CH 4 ): CH 4 + 2O 2 →CO 2 + 2H 2 O What information does this chemical equation provide? A. Methane is usually a gas. B. Oxygen is required to burn methane. C. The products of the reaction are toxic. D. The burning of methane releases energy.

28. $300 Answer from H3 A. Methane is usually a gas. B. Oxygen is required to burn methane. C. The products of the reaction are toxic. D. The burning of methane releases energy.

29. $400 Question from H3 In the atmosphere, ozone can form from oxygen as shown in the chemical reaction: 3O 2 → 2O 3 Based on the equation, what must be true? A. Ozone is poisonous. B. Burning gasoline creates ozone. C. Ozone has more mass than oxygen. D. The atmosphere has more ozone than oxygen.

30. $400 Answer from H3 A. Ozone is poisonous. B. Burning gasoline creates ozone. C. Ozone has more mass than oxygen. D. The atmosphere has more ozone than oxygen.

31. $500 Question from H3 The chemical reaction of sodium metal with water is: 2Na + 2H 2 O→ 2 NaOH + H 2 What kind of gas is released in this reaction? A. Steam B. Oxygen C. Sodium D. Hydrogen

32. $500 Answer from H3 A. Steam B. Oxygen C. Sodium D. Hydrogen

33. $100 Question from H4 Many cooks prefer using pans made of copper to pans made of steel. One reason is that copper pans get hotter much more rapidly than steel pans. This can be explained by differences between the copper and steel's — A. density. B. specific heat. C. atomic mass. D. atomic number.

34. $100 Answer from H4 A. density. B. specific heat. C. atomic mass. D. atomic number.

35. $200 Question from H4 Native Americans sometimes made soup by heating up stones in a fire and then dropping them into leather bags filled with water. Soon the water would begin boiling. The best stones for this purpose had a low — A. mass. B. density. C. permeability. D. specific heat.

36. $200 Answer from H4 A. mass. B. density. C. permeability. D. specific heat.

37. $300 Question from H4 A student observes a white light and the release of heat when a piece of magnesium ribbon reacts with oxygen gas. What type of reaction is this? A. Exothermic B. Precipitation C. Endothermic D. Neutralization

38. $300 Answer from H4 A. Exothermic B. Precipitation C. Endothermic D. Neutralization

39. $400 Question from H4 In order to determine if a reaction is endothermic, a student combines two chemicals in a test tube suspended in a beaker of water. Which of these is the best indicator that an endothermic reaction occurs? A. Chemicals change color. B. A strong odor is produced. C. Bubbles appear in the test tube. D. Water in the beaker becomes cooler to the touch.

40. $400 Answer from H4 A. Chemicals change color. B. A strong odor is produced. C. Bubbles appear in the test tube. D. Water in the beaker becomes cooler to the touch.

41. $500 Question from H4 Heat packs are often used for sore muscles. What type of reaction do heat packs utilize? A. Synthesis B. Exothermic C. Combustion D. Endothermic

42. $500 Answer from H4 A. Synthesis B. Exothermic C. Combustion D. Endothermic

43. $100 Question from H5 Your Text Here

44. $100 Answer from H5 53 Milliliters

45. $200 Question from H5 Your Text Here A student completes a lab that requires her to calculate the density of a rock. According to the readings above, what is the density of the rock? A. 0.5 g/ml B. 2 g/ml C. 50 g/ml D. 5000 g/ml

46. $200 Answer from H5 A. 0.5 g/ml B. 2 g/ml C. 50 g/ml D. 5000 g/ml

47. $300 Question from H5 Meteorologists have measured the rainfall for the month of August for the past seven years. The results are shown in the table and graph. 2. Which of the following is the best prediction for rainfall in 2009? A. between 0 and 2 cm B. between 3 and 5 cm C. between 7 and 9 cm D. between 10 and 12 cm August Rainfall Totals YearAmount of Rainfall 20027.8 cm 20034.3 cm 20043.9 cm 20054.0 cm 20068.4 cm 20073.75 cm 20084.25 cm

48. $300 Answer from H5 A. between 0 and 2 cm B. between 3 and 5 cm C. between 7 and 9 cm D. between 10 and 12 cm

49. $400 Question from H5 9.The element argon (Ar) is an odorless, colorless gas at room temperature. Which of these elements have similar physical properties? A. Carbon B. Krypton C. Chlorine D. Potassium

50. $400 Answer from H5 A. Carbon B. Krypton C. Chlorine D. Potassium

51. $500 Question from H5 Decide if each statement is describing an endothermic or an exothermic reaction. Record your answers on your sheet. Temperature rises Heat is absorbed Heat is given off Temperature falls

52. $500 Answer from H5 Temperature rises Heat is absorbed Heat is given off Temperature falls exothermic endothermic exothermic endothermic

53. Final Jeopardy Two differences between a compound and an element.

54. Final Jeopardy Answer An element is a single atom. A compound is composed of more than one atom of different elements Example: Element: C (Carbon) Compound: CO *Carbon Monoxide* (Carbon and Oxygen)