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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. Is the measure of energy temperature is a measure of the heat in an object.






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






3. Small uncharged particles in the nucleus they are neutral






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






5. As the velocity of a fluid increases - the pressure exerted by the fluid decreases - The speed of a fluid - liquid - gas - increases the pressure exerts.






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






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






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






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






10. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus






11. 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?






12. 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






13. 1000x the base unit






14. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.






15. Removal of static electricity by conduction






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






17. Series circut - Parallel circut






18. 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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19. The interference that occurs when two waves combine to make a wave with a smaller amplitude






20. It scatters light in many directions






21. Meter is the base unit of...






22. 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.






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






24. 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






25. The sum of the protons and neutrons






26. The object is further than one focal length from the lens






27. 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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28. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.






29. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper






30. 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






31. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy






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






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






34. Reflects the light in one direction






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






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






37. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B






38. Nuclear fission - Nuclear Fusion






39. Potential & Kinetic






40. Is the work done divided by the amount of the time it took to do it. P= w/t






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






42. The mechanical energy that a body has by virtue of its motion - energy of a moving object.






43. Liter is the base unit of...






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






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






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






47. Alkali Metals are the most _____________






48. 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.






49. Resistance is measured in...






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