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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. Potential & Kinetic






2. Is the change from liquid to gas.






3. 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






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






5. Animals in which of the following groups may have a backbone and a spinal cord?






6. The transfer of heat by electromagnetic waves is called?






7. The interference that occurs when two waves combine to make a wave with a larger amplitude






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






9. 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?






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






11. The interference that occurs when two waves combine to make a wave with a smaller amplitude






12. Gram is the base unit of...






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






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






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






16. 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.






17. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.






18. 10x the base unit






19. Resistance is measured in...






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






21. Atoms of the same element that have different numbers of neutrons






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






23. Small uncharged particles in the nucleus they are neutral






24. An isotope has a different number of...






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






26. P1/T1=P2/T2. States that the pressure of a fixed amount of gas in a fixed volume is proportional to its temperature.

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27. Change the chemical composition of a material - Computers can be made small enough to fit inside a plastic credit card - resistors are used to regulate volume on television or radio -






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






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






30. 1/10 the base unit






31. It scatters light in many directions






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






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






34. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling






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






36. Atoms with an equal # of protons and electrons.






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






38. 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






39. Organic molecules that are composed of only carbon and hydrogen.






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






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






42. Excess energy is released into the environment






43. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power






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






45. A functional group consisting of a sulfur atom bonded to a hydrogen atom (






46. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions






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






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






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






50. The process of heat transfer via solid contact







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