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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. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.






2. Solids - gasses - and 1 liquid (Bromine)






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






4. 8 electrons






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






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






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






8. The sum of the protons and neutrons






9. A circut with two or more resistors where the electricity has more than one path to travel






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






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






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






13. 1000x the base unit






14. Are small positively charged particles






15. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.






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






17. A carbon atom linked by a double bond to an oxygen atom. - c=o.






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






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






20. Small uncharged particles in the nucleus they are neutral






21. 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 -






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






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






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






25. Lacking affinity for water. Repels water. Non - polar






26. Electrons that can accept energy from outside sources and move farther away from the nucleus






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






28. The interference that occurs when two waves combine to make a wave with a larger amplitude






29. Gram is the base unit of...






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






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






32. 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






33. 1/10 the base unit






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






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






36. # of electrons. Non - metals have 4-8 electrons in their outermost energy.






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






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






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






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






41. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.






42. The monovalent group - OH in such compounds as bases and some acids and alcohols. Makes the molecule polar which increases the solubility of a compound.






43. Heat transferred by direct contact






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






45. (physics) the capacity of a physical system to do work - or supply heat.






46. Heat transferred by fluid current






47. Alkaline earth metals






48. Concave






49. A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green filter. What color does the paper appear under this illumination?






50. A heat that required to change (water from liquid to solid) from one state to another.






Can you answer 50 questions in 15 minutes?



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