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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. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.






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






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






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






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






6. The energy released by a nuclear reaction - binding energy is released when the nuclei of atoms are split apart in a nuclear reaction this binding energy is called nuclear energy.






7. A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green filter. What color does the paper appear under this illumination?






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






9. 1/1000 the base unit






10. 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






11. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.






12. Change from gas to liquid






13. The ability of the material to oppose the flow of electrons through it all






14. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.






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






16. 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


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






18. An object's _____ gives it resistance to change its current state of motion it is also the measure of an objects resistance to acceleration.






19. Polar molecules






20. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.






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






22. Heat transferred by direct contact






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






24. Is the study of the relationship between motion & the forces affecting motion.






25. 8 electrons






26. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.






27. Are small positively charged particles






28. Removal of static electricity by conduction






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






30. 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 -






31. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)






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






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






34. Harder - denser - have higher melting points & are chemically active.






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






36. 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.






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






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


39. A carbon atom linked by a double bond to an oxygen atom. - c=o.






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






41. The amount of energy that it takes to raise one gram of water one degree celsius.






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






43. Experiments may not be done on...






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






45. Conduction - Convection - & Radiation






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






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






48. 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.






49. An electric circut with a single path






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