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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 ability of the material to oppose the flow of electrons through it all






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






3. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions






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






5. Series circut - Parallel circut






6. 8 electrons






7. 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?






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






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






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






12. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes






13. The volume of a gas is directly proportional to the temperature of a gas






14. Elements in the middle of the periodic table - in groups 3-12.






15. Solids - gasses - and 1 liquid (Bromine)






16. Have properties in between metals and non - metals found in groups 13-16






17. The process of heat transfer via solid contact






18. 2 or more substances combine to form a compound EX. A+B -> AB






19. 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.






20. They are neither precise nor accurate.






21. 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






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






23. Liter is the base unit of...






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






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






26. 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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27. Decibels






28. 10x the base unit






29. 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.






30. Polar molecules






31. Substance that dissociates completely into its ions when added to water and conducts electricity well.






32. Are small positively charged particles






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






34. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?






35. Heat transferred by direct contact






36. An electric circut with a single path






37. Uses electrical charges of molecules to separate them according to their size the molecules such as DNA or proteins - are pulled through a gel towards either the positive end of the gel box.






38. 1. Constructive 2. Destructive






39. Potential & Kinetic






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






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






42. Pressure is measures in a unit called






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






44. 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.






45. Is the path along which electrons flow






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






47. The monovalent group - OH in such compounds as bases and some acids and alcohols. Makes the molecule polar which increases the solubility of a compound.






48. The buoyant force on an object is equal to the weight of the fluid displaced by the object






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






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