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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. Meter is the base unit of...






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






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






4. Heat transferred by fluid current






5. States that when 2 objects collide in an isolated system the total momentum of 2 objects after the collision. That is the momentum gained by object.






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






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






8. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.






9. # of protons + # of neutrons






10. Conduction - Convection - & Radiation






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






12. SI unit of temperature; indicates number of units above absolute zero. To go from Celsius to Kelvin add 273. To go from Kelvin to Celsius subtract 273.






13. 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?






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






15. Is the path along which electrons flow






16. Are used in the treatment of cancer b/c they can kill cancer cells. However - if powerful enough they can kill healthy cells.






17. The device (bell or Build) is an example of a load. A load is a device that uses energy.






18. Number of protons






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






20. 1. Constructive 2. Destructive






21. Removal of static electricity by conduction






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






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






24. 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.






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






26. Objects are in thermal contact if they can affect each others temperature






27. The region around a magnet where the magnetic force is exerted






28. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.






29. 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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30. Negatively charged particles found outside the nucleus






31. Mass of the substance contained per unit of volume






32. Is a simple device used to indicate the existence of a positive or negative charge.






33. The sum of the protons and neutrons






34. 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.






35. 8 electrons






36. 100x the base unit






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






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






39. Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.






40. Series circut - Parallel circut






41. Alkaline earth metals






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






43. 1000x the base unit






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






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






46. 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.






47. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.






48. 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






49. Alkali metals






50. Measure of the earth's pull