Test your basic knowledge |

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. Alkali Metals are the most _____________






2. Reflects the light in one direction






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






4. 'An object at rest will remain at rest - and an object moving at a constant velocity will continue moving at a constant velocity - unless it is acted upon by an unbalanced force.' Another name is Law of Inertia






5. Is the path along which electrons flow






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






7. Metal - nonmetals - & metalliods






8. 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.






9. Excess energy is released into the environment






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






11. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy






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






13. Relates pressure & temp. and temp and volume.






14. What are the # of protons in the nucleus of an atom called?






15. The difference in electrical charge between two points in a circuit expressed in volt. When an electron goes through a load it does work & loses some energy.






16. Lacking affinity for water. Repels water. Non - polar






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






18. Concave






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






20. All processes cease when temperature approaches 0.






21. Is the change from liquid to gas.






22. 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.






23. 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.






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






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






26. Harder - denser - have higher melting points & are chemically active.






27. 1000x the base unit






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






29. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.






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






31. Polar molecules






32. Change from gas to liquid






33. 1/10 the base unit






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






35. Heat transferred by fluid current






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






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






38. 100x the base unit






39. P1/T1=P2/T2. States that the pressure of a fixed amount of gas in a fixed volume is proportional to its temperature.

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






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






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






43. Meter is the base unit of...






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






45. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces






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






47. Uses the principles of capillary action to separate substances such as plant pigments molecules of a larger size will migrate up the paper more quickly produce lines of pigment. - a process used for separating mixtures by virtue of differences in abs






48. It scatters light in many directions






49. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.






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