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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. When measuring the volume of water in a graduated cylinder where does one read the measurement?






2. (physics) a process that alters the energy or structure or composition of atomic nuclei - When a reaction involves the nucleus - elements become different thus is called a nuclear reaction.






3. Removal of static electricity by conduction






4. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.






5. Metal - nonmetals - & metalliods






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






7. Negatively charged particles found outside the nucleus






8. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.






9. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces






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






11. Excess energy is released into the environment






12. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.






13. 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?






14. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions






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






16. The energy released by a nuclear reaction - binding energy is released when the nuclei of atoms are split apart in a nuclear reaction this binding energy is called nuclear energy.






17. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.






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






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






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






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

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22. Heat transferred by direct contact






23. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions






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






25. Concave






26. Animals in which of the following groups may have a backbone and a spinal cord?






27. 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)






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






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






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






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






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






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






34. 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?






35. 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.






36. Is the change from liquid to gas.






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. Alkali Metals are the most _____________






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






40. They are neither precise nor accurate.






41. Causes motion






42. Are small positively charged particles






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

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44. The mechanical energy that a body has by virtue of its position Ex. Stored energy -






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






46. States that when 2 objects collide in an isolated system the total momentum of 2 objects after the collision. That is the momentum gained by object.






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






48. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles






49. Measures the amount of matter in an object






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