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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 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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2. Series circut - Parallel circut






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






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






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






7. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat






8. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.






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






10. The more energy the electrons have






11. Gram is the base unit of...






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






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






14. Heat transferred by fluid current






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






16. Number of protons






17. 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?






18. Nuclear fission - Nuclear Fusion






19. Electrons that can accept energy from outside sources and move farther away from the nucleus






20. Alkali Metals are the most _____________






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






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






23. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.






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






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






26. Atoms of the same element that have different numbers of neutrons






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






28. 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






29. Mass & weight are not the ____ quality






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






31. 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.






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






33. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.






34. 1/1000 the base unit






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






36. Measures the amount of matter in an object






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






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






39. Reflects the light in one direction






40. Experiments may not be done on...






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






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






43. Change from gas to liquid






44. Removal of static electricity by conduction






45. 100x the base unit






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






47. A unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure. used by nutritionists to characterize the energy - producing potential in food






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






49. Liter is the base unit of...






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