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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. Concave






2. Measure of the earth's pull






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






4. It scatters light in many directions






5. Stored mechanical - Nuclear - Chemical - gravitational






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






7. Rotate at very high speed in order to separate the liquids from the solids. The more dense part of the solution will sediment at the bottom of the test tube. while the lighter material will stay on top. Ex. centrifuge is used to separate blood from b






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






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






10. 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.






11. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea






12. 1/10 the base unit






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






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






15. The sum of the protons and neutrons






16. Liter is the base unit of...






17. Inertia is the tendency of any object to resist change in motion. An object at rest tends to stay at rest. An object that is moving tends to keep moving.






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






19. The total entropy of a system plus that of its surroundings always increase.






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






21. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power






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






23. 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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24. 100x the base unit






25. 1. nuclear reaction 2. radioactive






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






27. Is the study of the relationship between motion & the forces affecting motion.






28. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX






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






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






31. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes






32. 8 electrons






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






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






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






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






37. # of protons + # of neutrons






38. Transfer of thermal energy with in a fluid. The particles in a fluid transfer the thermal energy from hot areas to cooler areas EX. the warmed up rising air from a heat source such as a fire or electric heater.






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






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






41. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.






42. Temporary magnets that lose their magnetism when electric current is removed






43. 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






44. Removal of static electricity by conduction






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






46. 2 or more substances combine to form a compound EX. A+B -> AB






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






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. Pressure is measures in a unit called






50. Mass & weight are not the ____ quality