Jeopardy: Test Your Knowledge

1. Jeopardy Choose a category. You will be given the question. You must give the correct answer. If wrong, click the yellow icon. To return to the Jeopardy categories, click the “home” button. Click to begin.

2. Choose a point value. Choose a point value. Click here for Final Jeopardy

3. Category A Category B Category C Category D Category E 10 Point 10 Point 10 Point 10 Point 10 Point 20 Points 20 Points 20 Points 20 Points 20 Points 30 Points 30 Points 30 Points 30 Points 30 Points 40 Points 40 Points 40 Points 40 Points 40 Points 50 Points 50 Points 50 Points 50 Points 50 Points

4. A radioactive isotope, Pu-241, has a half-life of 14.4 years. If you start with 10 g of pure Pu-241, how much will be left in 28.8 years? 14.4 g 5 g 20 g 2.5 g

5. 2.5 g

6. Not close!

7. Which of the following is a correct statement about a periodic trend? In general, the atomic radius of elements decreases going down the Periodic Table. In general, an electron is more tightly bound to its atom going from left to right across the Periodic Table. The reactivity of metals decreases going down the Periodic Table. In general, the atomic radius of elements increases going from left to right on the Periodic Table.

8. In general, an electron is more tightly bound to its atom going from left to right across the Periodic Table.

9. If you thought that you were wrong, you are right!

10. Four boys were working out with free weights in gym class. -Brett was holding a 150 pound barbell above his head. -Philip was spotting for Brett. -Bryan was walking toward the teacher carrying a box full of weights. -Doug was holding a squat with 30-pound barbell in each hand. The physical science teacher came by and said only one boy was actually doing work. Who was it? Brett Philip Bryan Doug

11. Bryan

12. STOP!

13. Lucas threw a softball up in the air to a height of 10 meters. Greg threw a softball up 12 meters. Greg threw the ball higher because the pull of gravity on the ball was less. he threw with greater force. there was less air friction when he threw it. gravity pulled the ball higher.

15. he threw with greater force.

16. Which of the two molecules contain and equal number of atoms? C2H6 KMnO4 H2SO4 C2H3OH H2SO4 and C2H3OH C2H6 and KMnO4 KMnO4 and H2SO4 C2H6 and C2H3OH

18. H2SO4 and C2H3OH

19. Lead is a bluish-white metal that will burn in air to produce lead (II) oxide. It is highly malleable and was used by the Romans to make pipes to carry water ("plumbing" is taken from the Latin name for lead "plumbum"). It has a relatively low melting point of 327°C and an atomic weight of 207.2 amu. Which property of lead is a chemical property? high malleability burns in air low melting point atomic weight is 207.2 amu

21. burns in air

22. Alan constructs a circuit that has two 1.5 V batteries arranged in series. These batteries power a single light bulb. What will happen if Alan adds another load in series? The resistance of the circuit has increased, so more current will flow. The voltage of the circuit has increased, so more current will flow. The resistance of the circuit has decreased, so less current will flow. The resistance of the circuit has increased, so less current will flow.

24. The resistance of the circuit has increased, so less current will flow.

25. Which of the following substances is the most chemically stable? Mg2+ Mg+ Cl- MgCl2(s)

27. MgCl2(s)

28. What is the danger of an uncontrolled chain reaction within the core of a nuclear fission reactor? An uncontrolled chain reaction will use up all of the fuel in the reactor and force the fission of the metals that make up the core casing. An uncontrolled chain reaction will produce enough heat to crack the reactor core open, releasing radioactive material. An uncontrolled chain reaction will produce enough electrons to electrically charge the reactor core. An uncontrolled chain reaction will produce enough heat to induce fusion in the reactor core, which will result in an explosion.

30. An uncontrolled chain reaction will produce enough heat to crack the reactor core open, releasing radioactive material.

31. The loss or gain of which subatomic particle has the greatest effect on chemical reactivity? electron proton neutron nucleon

33. electron

34. When energy is transformed from one form to another, some of the energy is lost in the form of mechanical energy. hydrogen gas. water. thermal energy.

35. thermal energy.

36. Too bad!

37. Joey hit a wall with a 1 meter long sledgehammer 20 times with a force of 200 Newton's. Much to Joey's dismay, the wall remained undamaged. If work = force X distance, how much work did Joey do on the wall? 0 joules 10 joules 200 joules 4000 joules

39. 0 joules

40. Ross was riding his bike down a hill, and he ran straight into a mailbox. Identify the statement that most closely describes Ross' motion immediately following his collision with the mailbox. He is thrown forward over the handlebars. He is thrown backwards off the bike. He is thrown sideways off the bike. He is thrown upward into the air.

41. Is It? Not So

42. He is thrown forward over the handlebars.

43. Gravity is the force of attraction between any two objects that have mass. The gravitational force that a body exerts depends, in part, on its mass. Which of the following factors also affects the amount of gravitational force experienced between two bodies? the distance between the bodies the relative speed of the bodies the altitude of the bodies the angle of the bodies

45. the distance between the bodies

46. Kinetic and Potential are terms that describe the energy of an object. Which of the following statements is true?All potential energy becomes kinetic energy. Potential energy is expressed as motion. All kinetic energy becomes potential energy. Potential energy is stored.

48. Potential energy is stored.

49. The nucleus of a tritium atom contains two neutrons and one proton. What is tritium?an isotope of hydrogen an isotope of helium an isotope of lithium an ion of helium