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






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






3. The process of heat transfer via solid contact






4. The total entropy of a system plus that of its surroundings always increase.






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






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






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






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






9. Decibels






10. Alkali Metals are the most _____________






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






12. 1. Constructive 2. Destructive






13. Higher because it has higher apparent frequency.






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






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






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






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






18. Measure of the earth's pull






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






20. Resistance is measured in...






21. Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.






22. 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.






23. 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?






24. Potential & Kinetic






25. Liter is the base unit of...






26. Substance that dissociates completely into its ions when added to water and conducts electricity well.






27. (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.






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






29. Conduction - Convection - & Radiation






30. Mass & weight are not the ____ quality






31. Measures the amount of matter in an object






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






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






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






35. Atoms of the same element that have different numbers of neutrons






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






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






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






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






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






41. Current is measured with a device called...






42. An electric circut with a single path






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






44. Is the path along which electrons flow






45. Average mass of various isotopes of the element.






46. Heat transferred by direct contact






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






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






49. The volume of a gas is directly proportional to the temperature of a gas






50. The difference in electrical charge between two points in a circuit expressed in volt. When an electron goes through a load it does work & loses some energy.






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