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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. Conduction - Convection - & Radiation






2. 1. nuclear reaction 2. radioactive






3. Number of protons






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






5. 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.






6. Stored mechanical - Nuclear - Chemical - gravitational






7. It scatters light in many directions






8. Alkaline earth metals






9. Average mass of various isotopes of the element.






10. Gram is the base unit of...






11. Heat transferred by direct contact






12. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.






13. 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.






14. 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?






15. They form only over warm oceans






16. Is a simple device used to indicate the existence of a positive or negative charge.






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






18. Small uncharged particles in the nucleus they are neutral






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






20. 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.






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






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






23. 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.






24. Decibels






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






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






27. The agent most widely and most consistently at work changing the appearance of the Earth's surface






28. Meter is the base unit of...






29. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system






30. A functional group consisting of a sulfur atom bonded to a hydrogen atom (






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






32. 10x the base unit






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






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






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






36. The relationship between voltage - current - and resistance - V=IR






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






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






39. Way of keeping tract of valence electrons






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






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






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






43. Mass & weight are not the ____ quality






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






45. 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.






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






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






48. Is the change from liquid to gas.






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






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







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