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






2. Heat energy that is transferred into or out of a system






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






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






5. Higher because it has higher apparent frequency.






6. The amount of heat it takes to change a solid to a liquid






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






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






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






10. 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






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






12. Measure of the earth's pull






13. They are neither precise nor accurate.






14. Nuclear fission - Nuclear Fusion






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






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






17. Specific gravity is the ratio based on...






18. Heat transferred by direct contact






19. Experiments may not be done on...






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






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






22. What are the # of protons in the nucleus of an atom called?






23. Measures the amount of matter in an object






24. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.






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






26. Change from gas to liquid






27. According to some scientists - the Earth's average surface temperature is rising as a result of the greenhouse effect. An increase in the atmospheric concentration of which of the following gases is considered to be primarily responsible






28. Gram is the base unit of...






29. Concave






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






31. 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?






32. Shiny - softer & less dense. Mostly chemically active






33. Resistance is measured in...






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






35. 1. nuclear reaction 2. radioactive






36. Mass & weight are not the ____ quality






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






38. 10x the base unit






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






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






41. '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






42. Have properties in between metals and non - metals found in groups 13-16






43. Is the study of the relationship between motion & the forces affecting motion.






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






45. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.






46. A compound of which a relatively small amount of the dissolved solute exists as ions in an aqueous solution. Example: Acetic acid - CH3COOH (vinegar)






47. Relates pressure & temp. and temp and volume.






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






49. Transfer of thermal energy with in a fluid. The particles in a fluid transfer the thermal energy from hot areas to cooler areas EX. the warmed up rising air from a heat source such as a fire or electric heater.






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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