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Praxis General Science

Subjects : praxis, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Removal of static electricity by conduction






2. The more energy the electrons have






3. Temporary magnets that lose their magnetism when electric current is removed






4. A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green filter. What color does the paper appear under this illumination?






5. Transfer of thermal energy with in a fluid. The particles in a fluid transfer the thermal energy from hot areas to cooler areas EX. the warmed up rising air from a heat source such as a fire or electric heater.






6. A heat that required to change (water from liquid to solid) from one state to another.






7. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.






8. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles






9. 1000x the base unit






10. Is done on an object when an applied force moves across a distance.






11. Mass & weight are not the ____ quality






12. Is an atom that has all of its electrons in the lowest possible energy levels






13. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.






14. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.






15. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator






16. The amount of heat it takes to change a solid to a liquid






17. 'An object at rest will remain at rest - and an object moving at a constant velocity will continue moving at a constant velocity - unless it is acted upon by an unbalanced force.' Another name is Law of Inertia






18. 1/1000 the base unit






19. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.






20. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.






21. When you step out of the shower the floor feels colder on your feet than the bathmat. Because heat is ______________ to the floor.






22. Change in the apparent frequency of a wave as observer and source move toward or away from each other






23. Substance that dissociates completely into its ions when added to water and conducts electricity well.






24. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B






25. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions






26. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions






27. Harder - denser - have higher melting points & are chemically active.






28. The mechanical energy that a body has by virtue of its motion - energy of a moving object.






29. A carbon atom linked by a double bond to an oxygen atom. - c=o.






30. The property of sound that varies with variation in the frequency of vibration.






31. SI unit of temperature; indicates number of units above absolute zero. To go from Celsius to Kelvin add 273. To go from Kelvin to Celsius subtract 273.






32. Alkaline earth metals






33. The ability of the material to oppose the flow of electrons through it all






34. Organic molecules that are composed of only carbon and hydrogen.






35. A circut with two or more resistors where the electricity has more than one path to travel






36. 1. nuclear reaction 2. radioactive






37. You see your reflection






38. Heat energy that is transferred into or out of a system






39. Inertia is the tendency of any object to resist change in motion. An object at rest tends to stay at rest. An object that is moving tends to keep moving.






40. Electrical - Light (radiant) - Heat (thermal) - Movement






41. The center of the atom.






42. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases






43. Heat absorbed or radiated during a change of phase at a constant temperature and pressure - the amount of heat required to undergo a phase change






44. Shiny - softer & less dense. Mostly chemically active






45. 2 or more substances combine to form a compound EX. A+B -> AB






46. Is the study of the relationship between motion & the forces affecting motion.






47. Group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts






48. Ratio of the density of a substance to the density of water






49. Have properties in between metals and non - metals found in groups 13-16






50. The number of electrons per second that flow past a point in a circut.