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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. Average mass of various isotopes of the element.






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






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






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






5. 1. nuclear reaction 2. radioactive






6. Excess energy is released into the environment






7. 100x the base unit






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






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






10. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease






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






12. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).






13. Removal of static electricity by conduction






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






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






17. The monovalent group - OH in such compounds as bases and some acids and alcohols. Makes the molecule polar which increases the solubility of a compound.






18. # of protons + # of neutrons






19. 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.






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






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






22. Series circut - Parallel circut






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






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






25. Relates pressure & temp. and temp and volume.






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






27. Uses electrical charges of molecules to separate them according to their size the molecules such as DNA or proteins - are pulled through a gel towards either the positive end of the gel box.






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






29. Group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts






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






31. Mass & weight are not the ____ quality






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






33. Carbon atom - atomic number 6 - atomic mass 11






34. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.






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






36. The more energy the electrons have






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






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






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






40. Higher because it has higher apparent frequency.






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






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






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






44. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.






45. 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?






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






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






48. 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.






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






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







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