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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. The amount of energy that it takes to raise one gram of water one degree celsius.






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






3. # of electrons. Non - metals have 4-8 electrons in their outermost energy.






4. (physics and chemistry) the smallest component of an element having the chemical properties of the element






5. As the velocity of a fluid increases - the pressure exerted by the fluid decreases - The speed of a fluid - liquid - gas - increases the pressure exerts.






6. Non - metals - group 18 - the most non - reactive elements






7. The more energy the electrons have






8. Removal of static electricity by conduction






9. All processes cease when temperature approaches 0.






10. Objects are in thermal contact if they can affect each others temperature






11. Rotate at very high speed in order to separate the liquids from the solids. The more dense part of the solution will sediment at the bottom of the test tube. while the lighter material will stay on top. Ex. centrifuge is used to separate blood from b






12. 1. nuclear reaction 2. radioactive






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






14. Which of the following parts of the Sun is easily visible only during a total solar eclipse






15. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).






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






17. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system






18. The acceleration of an object depends on the mass of the object and the amount of force applied.






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






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






21. Where are protons an neutrons located?






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






23. Mass of the substance contained per unit of volume






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






25. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease






26. The Earth's seasons can be attributed primarily to which of the following in conjunction with its revolution about the Sun?

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27. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea






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






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






30. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power






31. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B






32. Is the change from liquid to gas.






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






34. 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.






35. The total entropy of a system plus that of its surroundings always increase.






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






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






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






39. The sum of the protons and neutrons






40. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.






41. Used in electrical devices that have to function at temperatures too high for metals.






42. Small uncharged particles in the nucleus they are neutral






43. Causes motion






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






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






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






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






48. Number of protons






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






50. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.