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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. 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.






2. 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?






3. A boulder is sitting at the edge of the cliff it has which type of energy?






4. Meter is the base unit of...






5. The same pathogen must be found in every person with the same disease - the pathogen must be isolated & grown in a culture - when the organism is re - introduced in an experimental animal - that animal should develop the same disease originally seen

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6. Resistance is measured in...






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






8. 1/10 the base unit






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






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






11. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.






12. Heat energy that is transferred into or out of a system






13. Metal - nonmetals - & metalliods






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






15. The molecular weight of a substance expressed in grams - measures the amount of a substance






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






17. Potential & Kinetic






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






19. Causes motion






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






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






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






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






24. 100x the base unit






25. Stored mechanical - Nuclear - Chemical - gravitational






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






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






28. 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.






29. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.






30. 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?






31. 1. nuclear reaction 2. radioactive






32. 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






33. 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?






34. Negatively charged particles found outside the nucleus






35. # of electrons. Non - metals have 4-8 electrons in their outermost energy.






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






37. Substance that dissociates completely into its ions when added to water and conducts electricity well.






38. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system






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






40. Where are protons an neutrons located?






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






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






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






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






45. The speed of light changes in different materials this is due to__






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






47. Is the change from liquid to gas.






48. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.






49. An isotope has a different number of...






50. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.