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






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






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






4. (physics) the capacity of a physical system to do work - or supply heat.






5. The mechanical energy that a body has by virtue of its motion - energy of a moving object.






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






7. The more energy the electrons have






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






9. Inertia is the tendency of any object to resist change in motion. An object at rest tends to stay at rest. An object that is moving tends to keep moving.






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






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






12. 8 electrons






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






14. 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?






15. They are neither precise nor accurate.






16. A principle that states that for every action there is an equal reaction in the opposite direction

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






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






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






20. Heat transferred by fluid current






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






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






23. Is the measure of energy temperature is a measure of the heat in an object.






24. 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.






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






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






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






28. 10x the base unit






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






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






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






32. Specific gravity is the ratio based on...






33. 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.






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






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






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






37. 2 or more substances combine to form a compound EX. A+B -> AB






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






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






40. 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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41. 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?






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






43. 1. Liquid crystals - when certain solids melt their crystal lattices disintegrate & their particles lose their 3- dimensional pattern. 2. Solid - as a liquid substance cools & forms a solid. The strong attractive forces between oppositely charges ion






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






45. Mass of the substance contained per unit of volume






46. All processes cease when temperature approaches 0.






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






48. Alkali Metals are the most _____________






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






50. 1/1000 the base unit