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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. Stored mechanical - Nuclear - Chemical - gravitational






2. Relates pressure & temp. and temp and volume.






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






4. What are the # of protons in the nucleus of an atom called?






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






6. A compound of which a relatively small amount of the dissolved solute exists as ions in an aqueous solution. Example: Acetic acid - CH3COOH (vinegar)






7. Experiments may not be done on...






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






9. 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

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10. Way of keeping tract of valence electrons






11. 100x the base unit






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






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






14. Polar molecules






15. 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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16. Record vibrations in earth & allow us to measure earthquake activity.






17. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.






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






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






20. Consists of frequency (f) - measured in hertz - and wavelength measured in meters - the frequency times the wavelength of every electromagnetic wave equals the speed of light.






21. Alkali metals






22. Negatively charged particles found outside the nucleus






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






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






25. The interference that occurs when two waves combine to make a wave with a larger amplitude






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






27. Average mass of various isotopes of the element.






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






29. # of protons + # of neutrons






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






31. Small uncharged particles in the nucleus they are neutral






32. Change from gas to liquid






33. Shiny - softer & less dense. Mostly chemically active






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






35. 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.






36. All processes cease when temperature approaches 0.






37. Resistance is measured in...






38. They are neither precise nor accurate.






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






40. 1. nuclear reaction 2. radioactive






41. The process of heat transfer via solid contact






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






43. Are small positively charged particles






44. Electrons in the outermost energy level; they are involved in bond formation






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






46. 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)






47. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.






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






49. The difference in electrical charge between two points in a circuit expressed in volt. When an electron goes through a load it does work & loses some energy.






50. You see your reflection