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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 branch of physics that deals with static electricity - study of stationary electric charges.






2. Resistance is measured in...






3. Change the chemical composition of a material - Computers can be made small enough to fit inside a plastic credit card - resistors are used to regulate volume on television or radio -






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






5. Alkali metals






6. 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.






7. Is the path along which electrons flow






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






9. 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.






10. Is the change from liquid to gas.






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






12. Measures the amount of matter in an object






13. Alkali Metals are the most _____________






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






15. You see your reflection






16. Experiments may not be done on...






17. Measure of the earth's pull






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






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






20. Lacking affinity for water. Repels water. Non - polar






21. Concave






22. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling






23. The amount of energy required for the liquid at its boiling point to become a gas






24. Is a simple device used to indicate the existence of a positive or negative charge.






25. An electric circut with a single path






26. A buret is used to deliver solution in precisely - measured - variable volumes. deliver one reactant until the precise end point of the reaction is reached.






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






28. 1. Liquid crystals - when certain solids melt their crystal lattices disintegrate & their particles lose their 3- dimensional pattern. 2. Solid - as a liquid substance cools & forms a solid. The strong attractive forces between oppositely charges ion






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






30. Do not have molecules with one of the two molecular arrangements required to give an odor






31. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.






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






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






34. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.






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






36. 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






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






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






39. A gelatinous sample of material from a previously unexplored marine environment is thought to be living or to be composed of recently living material. Which of the following would most clearly confirm that the material has a biological origin?






40. Uses percent light absorbance to measure a color change - thus giving qualitative data using quantitative value - measures light intensity as a function of color - or more specifically - the wavelength of light.






41. A principle that states that for every action there is an equal reaction in the opposite direction

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42. Change from gas to liquid






43. The formula F=M/A is a shorthand force equals mass over acceleration. An object will not move unless the force is strong enough to move the mass.






44. Number of protons






45. The process of heat transfer via solid contact






46. '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






47. A functional group consisting of a sulfur atom bonded to a hydrogen atom (






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






49. 1/1000 the base unit






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







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