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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. Are small positively charged particles






2. The more energy the electrons have






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






4. Where are protons an neutrons located?






5. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat






6. Average mass of various isotopes of the element.






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






8. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).






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






10. Small uncharged particles in the nucleus they are neutral






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






12. 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






13. '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






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






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






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






17. Heat transferred by direct contact






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






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






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






21. Decibels






22. The branch of physics that deals with static electricity - study of stationary electric charges.






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






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






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






26. Removal of static electricity by conduction






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






28. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power






29. Mass & weight are not the ____ quality






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






31. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.






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






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






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






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






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






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






38. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper






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






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






41. Measures the amount of matter in an object






42. Inclined plane - lever - wheel & axle - pulley.






43. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.






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






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






46. 1/10 the base unit






47. 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?






48. Negatively charged particles found outside the nucleus






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






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