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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. Potential & Kinetic






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






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






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






5. Excess energy is released into the environment






6. Heat transferred by direct contact






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






8. Change the chemical composition of a material - Computers can be made small enough to fit inside a plastic credit card - resistors are used to regulate volume on television or radio -






9. Electrons in the outermost energy level; they are involved in bond formation






10. 1. Constructive 2. Destructive






11. 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)






12. Gram is the base unit of...






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






14. The more energy the electrons have






15. 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.






16. Removal of static electricity by conduction






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






18. 8 electrons






19. Average mass of various isotopes of the element.






20. A buret is used to deliver solution in precisely - measured - variable volumes. deliver one reactant until the precise end point of the reaction is reached.






21. 1/10 the base unit






22. Conduction - Convection - & Radiation






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






24. 10x the base unit






25. The process of heat transfer via solid contact






26. Measure of the earth's pull






27. 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






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






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






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






31. Temporary magnets that lose their magnetism when electric current is removed






32. 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.






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






34. An electric circut with a single path






35. 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.






36. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.






37. Relates pressure & temp. and temp and volume.






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






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






40. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea






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






42. 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.






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






44. Is the work done divided by the amount of the time it took to do it. P= w/t






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






46. Number of protons






47. 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






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






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






50. Uses electrical charges of molecules to separate them according to their size the molecules such as DNA or proteins - are pulled through a gel towards either the positive end of the gel box.