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






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






3. 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?






4. 1000x the base unit






5. 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.






6. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons






7. All processes cease when temperature approaches 0.






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






9. Inclined plane - lever - wheel & axle - pulley.






10. (physics) a process that alters the energy or structure or composition of atomic nuclei - When a reaction involves the nucleus - elements become different thus is called a nuclear reaction.






11. Resistance is measured in...






12. 8 electrons






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






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






15. The relationship between voltage - current - and resistance - V=IR






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






17. 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?






18. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.






19. Alkaline earth metals






20. Measures the amount of matter in an object






21. The amount of energy that it takes to raise one gram of water one degree celsius.






22. 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






23. Potential & Kinetic






24. Nuclear fission - Nuclear Fusion






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






26. Stored mechanical - Nuclear - Chemical - gravitational






27. 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.






28. Used in electrical devices that have to function at temperatures too high for metals.






29. Higher because it has higher apparent frequency.






30. 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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31. Is the study of the relationship between motion & the forces affecting motion.






32. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy






33. 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.






34. 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 -






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






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






37. Experiments may not be done on...






38. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.






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






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






41. Negatively charged particles found outside the nucleus






42. Liter is the base unit of...






43. The formula F=M/A is a shorthand force equals mass over acceleration. An object will not move unless the force is strong enough to move the mass.






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






45. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B






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






47. Is the change from liquid to gas.






48. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.






49. Several vehicles - initially at a complete stop - begin a long race at the same starting point. The vehicle that has a constant value for which of the following is most likely to win?






50. Series circut - Parallel circut