Category 1

1. Category 1 10 20 30 40 50 Category 2 10 20 30 40 50 Category 3 10 20 30 40 50 Category 4 10 20 30 40 50 Category 5 10 20 30 40 50

2. Category 1 questions follow

3. Category 1 10 A temperature inversion occurs when the upper layers of air are Warmer Cooler radioactive

4. Category 1 10 . A temperature inversion occurs when the upper layers of air are Warmer and pollution accumulates under the “lid” Cooler radioactive

5. Category 1 20 Which is not true about heat? Higher temperatures have shorter wavelengths Hot things cool faster in a black pot than a white pot When heat is added to boiling water, its temperature does not change A cup of coffee has more internal energy than an iceberg.

6. Category 1 20 Which is not true about heat? Higher temperatures have shorter wavelengths Hot things cool faster in a black pot than a white pot When heat is added to boiling water, its temperature does not change A cup of coffee has moreless internal energy than an iceberg.{but the coffee does have a higher temp.

7. Category 1 30 Which is not true about buoyancy? An object is buoyed by a force equal to the weight of liquid displaced A 1 ton elephant that floats displaces 1 ton of water Objects floating in air are buoyed up with a force equal to the weight of air it displaces. When ice in a glass melts, the water level will rise

8. Category 1 30 Which is not true about buoyancy? An object is buoyed by a force equal to the weight of liquid displaced A 1 ton elephant that floats displaces 1 ton of water Objects floating in air are buoyed up with a force equal to the weight of air it displaces. When ice in a glass melts, the water level will rise will remain at the same level

9. Category 1 40 Which is NOT true about black holes? A black hole is the remains of a giant star that has collapsed. When a sun collapses to a black hole, the gravity on an orbiting object would remain the same and the orbiting time would stay the same. If the mass of the earth increased with no change in radius, your weight would remain the same The greater the mass, the greater the gravitational attraction

10. Category 1 40 Which is NOT true about black holes? A black hole is the remains of a giant star that has collapsed. When a sun collapses to a black hole, the gravity on an orbiting object would remain the same and the orbiting time would stay the same. If the mass of the earth increased with no change in radius, your weight would remain the same also increase The greater the mass, the greater the gravitational attraction.

11. Category 1 50 Which NOT true about sound? It is a longitudinal wave It travels faster in solids, then liquids and finally air. Radio waves can travel through a vacuum Sound waves can travel through a vacuum.

12. Category 1 50 Which NOT true about sound? It is a longitudinal wave It travels faster in solids, then liquids and finally air. Radio waves can travel through a vacuum (It’s an E-M wave Sound waves can NOT travel through a vaccuum. So if a tree fell in a forest in a vacuum, you would not hear the sound of it falling.

13. Category 2 questions follow

14. Category 2 10 Which is NOT true about radiation? Gamma rays have no electric charge Uranium breaks down to become lead A nuclear reactor is controlled by control rods which absorb neutrons Non-Ionizing radiation is dangerous because it makes other things radioactive

15. Category 2 10 Which is NOT true about radiation? Gamma rays have no electric charge Uranium breaks down to become lead A nuclear reactor is controlled by control rods which absorb neutrons Non-Ionizing IONIZING radiation is dangerous because it makes other things radioactive

16. Which is NOT true about light? Light bends when it is nears an object with a large mass or gravitational field Light moves along a path of least time The brightest color is yellow-green Most of the E-M spectrum is visible. Cones in the eye provide color vision All E-M waves have the same speed 20

17. Category 2 20 Which is NOT true about light? Light bends when it is nears an object with a large mass or gravitational field Light moves along a path of least time The brightest color is yellow-green Most of the E-M spectrum is visible. invisible Cones in the eye provide color vision All E-M waves have the same speed

18. Category 2 30 .Which is NOT true about current? The wire which carries a current is charged. The source of electrons in an electrical circuit is the circuit itself An electric diode changes AC to DC Lamps connected in a parallel circuit have less resistance than individually.

19. Category 2 30 Which is NOT true about current? A wire which carries a current is NOT charged. The source of electrons in an electrical circuit is the circuit itself An electric diode changes AC to DC Lamps connected in a parallel circuit have less resistance than individually.

20. Category 2 40 Which not true about electromagnetism? A magnet thrust into a coil of wire will have a current and becomes an electromagnet An electric motor is similar to an electric generator An iron rod becomes magnetic when the net spins of its electrons are in the same direction DC power is used instead of AC in long distance power lines because its voltage can be easily converted by transformers.

21. Category 2 40 Which not true about electromagnetism? A magnet thrust into a coil of wire will have a current and becomes an electromagnet An electric motor is similar to an electric generator An iron rod becomes magnetic when the net spins of its electrons are in the same direction DC AC power is used instead ofACDC in long distance power lines because its voltage can be easily converted by transformers.

22. Category 2 50 Which is true about waves? A wave is a wiggle in time A Transverse waves motion is in the direction of wave travel A Longitudinal waves motion is at right angles to the direction of wave travel A node is a position of minimum amplitude

23. Category 2 50 Which is true about waves? A waveVibration is a wiggle in time A TransverseLongitudinal waves motion is in the direction of wave travel A Longitudinal Transverse waves motion is at right angles to the direction of wave travel A node is a position of minimum amplitude

24. Category 3 questions follow

25. Category 3 10 Which is true about motion/waves? Bow waves are produced when a boat moves slower than the wave. If a child stands on a swing, the time of the swing is shortened. If no external forces act on a moving object it will move slower until it stops

26. Category 3 10 Which is true about motion/waves? Bow waves are produced when a boat moves slowerfaster than the wave. If a child stands on a swing, the time of the swing is shortened. If no external forces act on a moving object it will move slower until it stops in a straight line, with the same velocity

27. Category 3 20 Which is true? Bullets fired toward the rear of a plane would cause the planes momentum to decrease. You want a cannon with a large mass compared to its missile, or the target would be safer than the shooter. If a cannon has a longer barrel, its velocity would decrease.

28. Category 3 20 Which is true? Bullets fired toward the rear of a plane would cause the planes momentum toincrease decrease. You want a cannon with a large mass compared to its missile, or the target would be safer than the shooter. If a cannon has a longer barrel, its velocity would decrease increase. (you really need more details)

29. Category 3 30 Which is true about circular motion? A twirling skater who moves her arms outward, slows down. If you are trying to balance an object which is heavy on one end, it is easier if the heavy end is down

30. Category 3 30 Which is true about circular motion? A twirling skater who moves her arms outward, slows down. If you are trying to balance an object which is heavy on one end, it is easier if the heavy end is updown

31. Category 3 40 Which is not true about mass? If the mass of an object doubles, its gravitational force is doubled Mass does not change, regardless of where you are A mass of 20 kg has a weight of about 200 N If the moon has a gravitational attraction of 4000 N on the sun, the suns force on it is less.

32. Category 3 40 Which is not true about mass? If the mass of an object doubles, its gravitational force is doubled Mass does not change, regardless of where you are A mass of 20 kg has a weight of about 200 N (F = ma) If the moon has a gravitational attraction of 4000 N on the sun, the suns force on it is less. The same= 4000 N

33. Category 3 50 Which is not true about projectiles? It takes the same amount of time to go up as it takes to fall If it takes 1 second to reach the top, it was thrown up at 10 m/s At the top of its path, the acceleration is 0

34. Category 3 50 Which is not true about projectiles? It takes the same amount of time to go up as it takes to fall If it takes 1 second to reach the top, it was thrown up at 10 m/s (V = gt or 10 m/s = (10 m/s2) ( 1 sec) At the top of its path, the acceleration is 9.8 m/s2, NOT0

35. Category 4 questions follow

36. Category 4 10 Which is not true? sparkler will burn you because little energy is transferred because few molecules are transferred. Chinook winds are produced by increased pressure of winds moving down a mountain which can warm an environment. Facts may change, but a scientist who reports false information gets no second chance.

37. Category 4 10 Which is not true? sparkler will NOT burn you because little energy is transferred because few molecules are transferred. Chinook winds are produced by increased pressure of winds moving down a mountain which can warm an environment. Facts may change, but a scientist who reports false information gets no second chance.

38. Category 4 20 Which is NOT true? We are warmed by condensation because water molecules in the air that strike our bodies transfer some of the kinetic energy to us. Evaporation is a warming process where the most energetic particles escape

39. Category 4 20 Which is NOT true? We are warmed by condensation because water molecules in the air that strike our bodies transfer some of the kinetic energy to us. Evaporation is a cooling warmingprocess where the most energetic particles escape

40. Category 4 30 Why is time so important to someone who is falling? Because you speed up You fall farther in each second, the longer you fall Terminal velocity means that the time it takes you to fall does not matter A and b are correct

41. Category 4 30 Why is time so important to someone who is falling? Because you speed up as you fall (v = gt) You fall farther in each second, the longer you fall Terminal velocity means that the time it takes you to fall does not matter A and b are correct

42. Category 4 40 Which is NOT true? Plasmas can conduct current, but gases can’t The faster a fluid moves, the lower the internal pressure A 5 kg bag of large apples will need more caramel to coat them than a 5 kg bag of small potatoes

43. Category 4 40 Which is NOT true? Plasmas can conduct current, but gases can’t The faster a fluid moves, the lower the internal pressure A 5 kg bag of small largeapples will need more caramel to coat them than a 5 kg bag of large smallpotatoes

44. Category 4 50 What is the primary purpose of a lightning rod?

45. Category 4 50 What is the primary purpose of a lightning rod? discharge the structure to which it is attached.

46. Category 5 questions follow

47. Category 5 10 A woman carries a heavy box across a room at a constant speed. How much work does she do on the box while walking?

48. Category 5 10 A woman carries a heavy box across a room at a constant speed. How much work does she do on the box while walking? none

49. Category 5 20 What force binds atoms together to form molecules? Gravity electrical

50. Category 5 20 What force binds atoms together to form molecules? Gravity electrical