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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. Uses percent light absorbance to measure a color change - thus giving qualitative data using quantitative value - measures light intensity as a function of color - or more specifically - the wavelength of light.






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






3. When you step out of the shower the floor feels colder on your feet than the bathmat. Because heat is ______________ to the floor.






4. Mass & weight are not the ____ quality






5. Is done on an object when an applied force moves across a distance.






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






7. The sum of the protons and neutrons






8. 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?






9. 1000x the base unit






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






11. The interference that occurs when two waves combine to make a wave with a larger amplitude






12. 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?






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






14. Liter is the base unit of...






15. The number of electrons per second that flow past a point in a circut.






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






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






18. Elements in the middle of the periodic table - in groups 3-12.






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






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






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

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22. Measure of the earth's pull






23. 1. nuclear reaction 2. radioactive






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






25. 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.






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






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






28. Excess energy is released into the environment






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






30. Pressure is measures in a unit called






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






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






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






35. An isotope has a different number of...






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






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






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






39. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B






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






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






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






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






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






45. 2 or more substances combine to form a compound EX. A+B -> AB






46. The process of heat transfer via solid contact






47. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.






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






49. Removal of static electricity by conduction






50. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.