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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. Causes motion






2. 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






3. Number of protons






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






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






6. All processes cease when temperature approaches 0.






7. Uses the principles of capillary action to separate substances such as plant pigments molecules of a larger size will migrate up the paper more quickly produce lines of pigment. - a process used for separating mixtures by virtue of differences in abs






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






9. Stored mechanical - Nuclear - Chemical - gravitational






10. Reflects the light in one direction






11. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons






12. Mass of the substance contained per unit of volume






13. 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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14. Concave






15. Alkali Metals are the most _____________






16. Where are protons an neutrons located?






17. An electric circut with a single path






18. The agent most widely and most consistently at work changing the appearance of the Earth's surface






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






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






21. According to some scientists - the Earth's average surface temperature is rising as a result of the greenhouse effect. An increase in the atmospheric concentration of which of the following gases is considered to be primarily responsible






22. 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?






23. They form only over warm oceans






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






25. Heat transferred by direct contact






26. 8 electrons






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






28. Nuclear fission - Nuclear Fusion






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






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






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






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






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






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






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






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

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






38. 1. All are solids having the appearance of metals & non - metals. 2. All are white or gray - but not shiny 3. Conduct electricity - but not as well as metals.






39. They are neither precise nor accurate.






40. 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.






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






42. The state of two or more objects or substances in thermal contact when they have reached a common temperature - EX. the affects after a hot cup of coffee meeting the desk temperature.






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






44. Higher because it has higher apparent frequency.






45. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.






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






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






48. You see your reflection






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






50. 1/10 the base unit