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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. 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.






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






3. Higher because it has higher apparent frequency.






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






5. Liter is the base unit of...






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






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






8. Are small positively charged particles






9. It scatters light in many directions






10. The molecular weight of a substance expressed in grams - measures the amount of a substance






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






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






13. 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.






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






15. Mass of the substance contained per unit of volume






16. Conduction - Convection - & Radiation






17. Alkaline earth metals






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






19. They are neither precise nor accurate.






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






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






22. Potential & Kinetic






23. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease






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






25. Heat transferred by direct contact






26. 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.






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






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






29. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.






30. Is an atom that has all of its electrons in the lowest possible energy levels






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






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






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






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






35. Mass & weight are not the ____ quality






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






37. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons






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






39. Pressure is measures in a unit called






40. 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






41. Negatively charged particles found outside the nucleus






42. An electric circut with a single path






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






44. Alkali metals






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






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






47. Most directly involved with controlling levels of sugar in blood






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






49. 1. Liquid crystals - when certain solids melt their crystal lattices disintegrate & their particles lose their 3- dimensional pattern. 2. Solid - as a liquid substance cools & forms a solid. The strong attractive forces between oppositely charges ion






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