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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. 10x the base unit






2. Mass & weight are not the ____ quality






3. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.






4. 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.






5. Mass of the substance contained per unit of volume






6. 1. Constructive 2. Destructive






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






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






9. Nuclear fission - Nuclear Fusion






10. The center of the atom.






11. Electrical - Light (radiant) - Heat (thermal) - Movement






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






13. Heat transferred by direct contact






14. Polar molecules






15. Measure of the earth's pull






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






17. Stored mechanical - Nuclear - Chemical - gravitational






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






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






21. Liter is the base unit of...






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






23. P1/T1=P2/T2. States that the pressure of a fixed amount of gas in a fixed volume is proportional to its temperature.

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24. Is the change from liquid to gas.






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






26. Metal - nonmetals - & metalliods






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






28. 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






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






30. Atoms with an equal # of protons and electrons.






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






32. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.






33. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions






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






35. The relationship between voltage - current - and resistance - V=IR






36. An electric circut with a single path






37. 8 electrons






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






39. The process of heat transfer via solid contact






40. 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.






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






42. 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.






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






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






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






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






47. Resistance is measured in...






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






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






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