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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. Removal of static electricity by conduction






2. Stored mechanical - Nuclear - Chemical - gravitational






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






4. 10x the base unit






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






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






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






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






9. Which of the following parts of the Sun is easily visible only during a total solar eclipse






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






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






13. Pressure is measures in a unit called






14. 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.






15. 100x the base unit






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






17. A buret is used to deliver solution in precisely - measured - variable volumes. deliver one reactant until the precise end point of the reaction is reached.






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






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






20. 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 -






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






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






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






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






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






26. Conduction - Convection - & Radiation






27. Way of keeping tract of valence electrons






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






29. 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.






30. An electric circut with a single path






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






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






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






34. 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?






35. Electrons in the outermost energy level; they are involved in bond formation






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






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






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






39. Decibels






40. 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?






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






42. Solids - gasses - and 1 liquid (Bromine)






43. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.






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






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






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






47. Measure of the earth's pull






48. It scatters light in many directions






49. Animals in which of the following groups may have a backbone and a spinal cord?






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