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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. It scatters light in many directions






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






3. 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.






4. Are small positively charged particles






5. Finding that a solution conducts an electric current shows conclusively that the solution...






6. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)






7. 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






8. 1. All are solids having the appearance of metals & non - metals. 2. All are white or gray - but not shiny 3. Conduct electricity - but not as well as metals.






9. Do not have molecules with one of the two molecular arrangements required to give an odor






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






11. Number of protons






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






13. The amount of energy that it takes to raise one gram of water one degree celsius.






14. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.






15. The property of sound that varies with variation in the frequency of vibration.






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






17. Stored mechanical - Nuclear - Chemical - gravitational






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






19. Alkaline earth metals






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






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






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






23. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles






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






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






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






27. 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.






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






29. Causes motion






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






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






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






33. Liter is the base unit of...






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






35. Mass & weight are not the ____ quality






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






37. Heat transferred by direct contact






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






39. Metal - nonmetals - & metalliods






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






41. Heat transferred by fluid current






42. 10x the base unit






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






44. Uses the principles of capillary action to separate substances such as plant pigments molecules of a larger size will migrate up the paper more quickly produce lines of pigment. - a process used for separating mixtures by virtue of differences in abs






45. Higher because it has higher apparent frequency.






46. All processes cease when temperature approaches 0.






47. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.






48. 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.






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






50. A principle that states that for every action there is an equal reaction in the opposite direction