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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. 10x the base unit






2. The total entropy of a system plus that of its surroundings always increase.






3. Temporary magnets that lose their magnetism when electric current is removed






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






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






6. The more energy the electrons have






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






8. (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.






9. 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






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






11. 1. Constructive 2. Destructive






12. The speed of light changes in different materials this is due to__






13. Series circut - Parallel circut






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






15. 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.






16. All processes cease when temperature approaches 0.






17. 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






18. They form only over warm oceans






19. Removal of static electricity by conduction






20. Objects are in thermal contact if they can affect each others temperature






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






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






23. A gelatinous sample of material from a previously unexplored marine environment is thought to be living or to be composed of recently living material. Which of the following would most clearly confirm that the material has a biological origin?






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






25. Higher because it has higher apparent frequency.






26. 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.






27. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.






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






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






30. You see your reflection






31. Small uncharged particles in the nucleus they are neutral






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






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






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






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






36. 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.






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






38. An electric circut with a single path






39. Measure of the earth's pull






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






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






42. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases






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






44. 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






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






46. A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green filter. What color does the paper appear under this illumination?






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






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






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






50. Meter is the base unit of...