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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. Causes motion






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

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






4. 1/1000 the base unit






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






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






7. Gram is the base unit of...






8. Electrical - Light (radiant) - Heat (thermal) - Movement






9. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)






10. Resistance is measured in...






11. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper






12. 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 -






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






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






15. Heat transferred by direct contact






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






17. Decibels






18. Reflects the light in one direction






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






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






21. 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.






22. Have properties in between metals and non - metals found in groups 13-16






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






24. Uses sound waves to locate objects and is especially useful underwater the sound waves bounce off the object and are used to assist in location






25. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling






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






27. Excess energy is released into the environment






28. Relates pressure & temp. and temp and volume.






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






30. Alkali metals






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






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






33. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.






34. An electric circut with a single path






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






36. Rotate at very high speed in order to separate the liquids from the solids. The more dense part of the solution will sediment at the bottom of the test tube. while the lighter material will stay on top. Ex. centrifuge is used to separate blood from b






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






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






39. Average mass of various isotopes of the element.






40. Are small positively charged particles






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






42. Meter is the base unit of...






43. Higher because it has higher apparent frequency.






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






45. The center of the atom.






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






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. 1. Constructive 2. Destructive






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






50. Nuclear fission - Nuclear Fusion