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






2. 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.






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






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






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






6. Average mass of various isotopes of the element.






7. Alkali metals






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






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






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






11. SI unit of temperature; indicates number of units above absolute zero. To go from Celsius to Kelvin add 273. To go from Kelvin to Celsius subtract 273.






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






13. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy






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






15. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.






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






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






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






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






20. The Earth's seasons can be attributed primarily to which of the following in conjunction with its revolution about the Sun?


21. The region around a magnet where the magnetic force is exerted






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






23. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.






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






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






26. 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?






27. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.






28. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.






29. 1. Constructive 2. Destructive






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






31. Reflects the light in one direction






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






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






34. 100x the base unit






35. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons






36. An object's _____ gives it resistance to change its current state of motion it is also the measure of an objects resistance to acceleration.






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






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






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






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






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






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






43. Heat absorbed or radiated during a change of phase at a constant temperature and pressure - the amount of heat required to undergo a phase change






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






45. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator






46. The device (bell or Build) is an example of a load. A load is a device that uses energy.






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






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






49. 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






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