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. Number of protons






2. 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

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


3. A circut with two or more resistors where the electricity has more than one path to travel






4. 1/10 the base unit






5. # of protons + # of neutrons






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






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






8. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat






9. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B






10. Uses electrical charges of molecules to separate them according to their size the molecules such as DNA or proteins - are pulled through a gel towards either the positive end of the gel box.






11. The amount of heat it takes to change a solid to a liquid






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






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






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






15. Concave






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






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






18. 100x the base unit






19. 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?






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






21. The number of electrons per second that flow past a point in a circut.






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






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






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






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






26. Average mass of various isotopes of the element.






27. The transfer of heat by electromagnetic waves is called?






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






29. 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.






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






31. Do not have molecules with one of the two molecular arrangements required to give an odor






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






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






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






35. Is the work done divided by the amount of the time it took to do it. P= w/t






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






37. 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.






38. Higher because it has higher apparent frequency.






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






40. Ratio of the density of a substance to the density of water






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






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






43. Atoms with an equal # of protons and electrons.






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






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






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






47. A compound of which a relatively small amount of the dissolved solute exists as ions in an aqueous solution. Example: Acetic acid - CH3COOH (vinegar)






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






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






50. 1000x the base unit