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






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






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






4. You see your reflection






5. Meter is the base unit of...






6. Heat transferred by fluid current






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






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






9. 10x the base unit






10. Conduction - Convection - & Radiation






11. Higher because it has higher apparent frequency.






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






13. Small uncharged particles in the nucleus they are neutral






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






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






16. 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?






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






18. 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






19. # of protons + # of neutrons






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






21. Concave






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






23. 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?






24. 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.






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






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






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






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






29. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?






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






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






32. An electric circut with a single path






33. The agent most widely and most consistently at work changing the appearance of the Earth's surface






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






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


36. All processes cease when temperature approaches 0.






37. 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 -






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






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






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






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






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






43. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.






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






45. The process of heat transfer via solid contact






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






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






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






49. 100x the base unit






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