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






3. Mass of the substance contained per unit of volume






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






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






6. Liter is the base unit of...






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






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






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






10. Negatively charged particles found outside the nucleus






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






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






13. 1/1000 the base unit






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






15. Non - metals - group 18 - the most non - reactive elements






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






17. The mechanical energy that a body has by virtue of its position Ex. Stored energy -






18. Gram is the base unit of...






19. Excess energy is released into the environment






20. Heat transferred by direct contact






21. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.






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






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






24. Mass & weight are not the ____ quality






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






26. You see your reflection






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






28. (physics) the capacity of a physical system to do work - or supply heat.






29. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.






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






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






32. The center of the atom.






33. Organic molecules that are composed of only carbon and hydrogen.






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






35. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.






36. 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?






37. 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.






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






39. 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






40. Pressure is measures in a unit called






41. Removal of static electricity by conduction






42. 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 -






43. 2 or more substances combine to form a compound EX. A+B -> AB






44. 1. nuclear reaction 2. radioactive






45. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point






46. When measuring the volume of water in a graduated cylinder where does one read the measurement?






47. 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.






48. 1. Constructive 2. Destructive






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






50. Change in the apparent frequency of a wave as observer and source move toward or away from each other






Can you answer 50 questions in 15 minutes?



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