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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. Harder - denser - have higher melting points & are chemically active.






2. 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.






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






4. Concave






5. 1/10 the base unit






6. Gram is the base unit of...






7. 1/1000 the base unit






8. States that when 2 objects collide in an isolated system the total momentum of 2 objects after the collision. That is the momentum gained by object.






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






10. 10x the base unit






11. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea






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






13. Is a simple device used to indicate the existence of a positive or negative charge.






14. A buret is used to deliver solution in precisely - measured - variable volumes. deliver one reactant until the precise end point of the reaction is reached.






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






16. Pressure is measures in a unit called






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






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






19. Is the path along which electrons flow






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






21. Negatively charged particles found outside the nucleus






22. Way of keeping tract of valence electrons






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






24. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy






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






26. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus






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






28. Resistance is measured in...






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






30. The region around a magnet where the magnetic force is exerted






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






32. They form only over warm oceans






33. Inertia is the tendency of any object to resist change in motion. An object at rest tends to stay at rest. An object that is moving tends to keep moving.






34. The mechanical energy that a body has by virtue of its motion - energy of a moving object.






35. Uses percent light absorbance to measure a color change - thus giving qualitative data using quantitative value - measures light intensity as a function of color - or more specifically - the wavelength of light.






36. They are neither precise nor accurate.






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






38. (physics) a process that alters the energy or structure or composition of atomic nuclei - When a reaction involves the nucleus - elements become different thus is called a nuclear reaction.






39. 100x the base unit






40. Alkaline earth metals






41. 1. Constructive 2. Destructive






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






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






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






45. Which of the following parts of the Sun is easily visible only during a total solar eclipse






46. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes






47. SI unit of temperature; indicates number of units above absolute zero. To go from Celsius to Kelvin add 273. To go from Kelvin to Celsius subtract 273.






48. Mass & weight are not the ____ quality






49. Alkali Metals are the most _____________






50. Heat transferred by direct contact






Can you answer 50 questions in 15 minutes?



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