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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. Liter is the base unit of...






2. Conduction - Convection - & Radiation






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






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






5. 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.






6. The sum of the protons and neutrons






7. Way of keeping tract of valence electrons






8. Mass & weight are not the ____ quality






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






10. Uses sound waves to locate objects and is especially useful underwater the sound waves bounce off the object and are used to assist in location






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






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






13. Heat transferred by fluid current






14. Where are protons an neutrons located?






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






16. Negatively charged particles found outside the nucleus






17. Average mass of various isotopes of the element.






18. Gram is the base unit of...






19. Causes motion






20. Metal - nonmetals - & metalliods






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






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






23. 1. Constructive 2. Destructive






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






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






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






27. Pressure is measures in a unit called






28. An electric circut with a single path






29. 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






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






31. Decibels






32. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.






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






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






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






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






37. Polar molecules






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






39. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.






40. As the velocity of a fluid increases - the pressure exerted by the fluid decreases - The speed of a fluid - liquid - gas - increases the pressure exerts.






41. 2 or more substances combine to form a compound EX. A+B -> AB






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






43. Potential & Kinetic






44. You see your reflection






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






46. Relates pressure & temp. and temp and volume.






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






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






49. The more energy the electrons have






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