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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. The process of heat transfer via solid contact






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






3. Is the change from liquid to gas.






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






5. Lacking affinity for water. Repels water. Non - polar






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






7. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.






8. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.






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






10. Pressure is measures in a unit called






11. The energy released by a nuclear reaction - binding energy is released when the nuclei of atoms are split apart in a nuclear reaction this binding energy is called nuclear energy.






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






13. The number of electrons per second that flow past a point in a circut.






14. Mass & weight are not the ____ quality






15. Excess energy is released into the environment






16. Metal - nonmetals - & metalliods






17. Potential & Kinetic






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






19. Conduction - Convection - & Radiation






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






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






22. 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 -






23. Polar molecules






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






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






26. A unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure. used by nutritionists to characterize the energy - producing potential in food






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






28. A heat that required to change (water from liquid to solid) from one state to another.






29. The state of two or more objects or substances in thermal contact when they have reached a common temperature - EX. the affects after a hot cup of coffee meeting the desk temperature.






30. Where are protons an neutrons located?






31. Heat absorbed or radiated during a change of phase at a constant temperature and pressure - the amount of heat required to undergo a phase change






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






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






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






35. Measures the amount of matter in an object






36. The Earth's seasons can be attributed primarily to which of the following in conjunction with its revolution about the Sun?

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37. Inclined plane - lever - wheel & axle - pulley.






38. Decibels






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






40. Liter is the base unit of...






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






42. Change in the apparent frequency of a wave as observer and source move toward or away from each other






43. An object's _____ gives it resistance to change its current state of motion it is also the measure of an objects resistance to acceleration.






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






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






46. 1000x the base unit






47. All processes cease when temperature approaches 0.






48. Relates pressure & temp. and temp and volume.






49. Removal of static electricity by conduction






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







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