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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. (physics) the capacity of a physical system to do work - or supply heat.






2. Liter is the base unit of...






3. Nuclear fission - Nuclear Fusion






4. The device (bell or Build) is an example of a load. A load is a device that uses energy.






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






6. Experiments may not be done on...






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






8. The volume of a gas is directly proportional to the temperature of a gas






9. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.






10. Pressure is measures in a unit called






11. Resistance is measured in...






12. Several vehicles - initially at a complete stop - begin a long race at the same starting point. The vehicle that has a constant value for which of the following is most likely to win?






13. Uses sound waves to locate objects and is especially useful underwater the sound waves bounce off the object and are used to assist in location






14. Most directly involved with controlling levels of sugar in blood






15. The same pathogen must be found in every person with the same disease - the pathogen must be isolated & grown in a culture - when the organism is re - introduced in an experimental animal - that animal should develop the same disease originally seen

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16. A wave in which the particles move parallel to the path of the wave






17. An electric circut with a single path






18. 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






19. Current is measured with a device called...






20. The buoyant force on an object is equal to the weight of the fluid displaced by the object






21. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.






22. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.






23. The transfer of heat by electromagnetic waves is called?






24. Solids - gasses - and 1 liquid (Bromine)






25. The speed of light changes in different materials this is due to__






26. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces






27. 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.






28. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX






29. 1/10 the base unit






30. 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.






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






32. Inclined plane - lever - wheel & axle - pulley.






33. The molecular weight of a substance expressed in grams - measures the amount of a substance






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






35. The process of heat transfer via solid contact






36. Mass of the substance contained per unit of volume






37. Heat transferred by fluid current






38. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy






39. Are used in the treatment of cancer b/c they can kill cancer cells. However - if powerful enough they can kill healthy cells.






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






41. The interference that occurs when two waves combine to make a wave with a smaller amplitude






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






43. An isotope has a different number of...






44. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.






45. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.






46. Is the path along which electrons flow






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






48. Finding that a solution conducts an electric current shows conclusively that the solution...






49. A boulder is sitting at the edge of the cliff it has which type of energy?






50. The object is further than one focal length from the lens