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






2. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases






3. Consists of frequency (f) - measured in hertz - and wavelength measured in meters - the frequency times the wavelength of every electromagnetic wave equals the speed of light.






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






5. Resistance is measured in...






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






7. Measure of the earth's pull






8. It scatters light in many directions






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






10. 1/10 the base unit






11. 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.






12. Heat transferred by direct contact






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






14. # of protons + # of neutrons






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






16. Transfer of thermal energy with in a fluid. The particles in a fluid transfer the thermal energy from hot areas to cooler areas EX. the warmed up rising air from a heat source such as a fire or electric heater.






17. Causes motion






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






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






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






21. 'An object at rest will remain at rest - and an object moving at a constant velocity will continue moving at a constant velocity - unless it is acted upon by an unbalanced force.' Another name is Law of Inertia






22. The acceleration of an object depends on the mass of the object and the amount of force applied.






23. Alkali Metals are the most _____________






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






25. Higher because it has higher apparent frequency.






26. Finding that a solution conducts an electric current shows conclusively that the solution...






27. Potential & Kinetic






28. The sum of the protons and neutrons






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






30. You see your reflection






31. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point






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






33. A unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure. used by nutritionists to characterize the energy - producing potential in food






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






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






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






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






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






39. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.






40. Where are protons an neutrons located?






41. They are neither precise nor accurate.






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






43. Polar molecules






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






45. The center of the atom.






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






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






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






49. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.






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