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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. You see your reflection






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






3. Is the measure of energy temperature is a measure of the heat in an object.






4. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.






5. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy






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






7. Stored mechanical - Nuclear - Chemical - gravitational






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






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






10. The formula F=M/A is a shorthand force equals mass over acceleration. An object will not move unless the force is strong enough to move the mass.






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






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






13. Reflects the light in one direction






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






15. Polar molecules






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






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






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






19. Pressure is measures in a unit called






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






21. All processes cease when temperature approaches 0.






22. 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.






23. It scatters light in many directions






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






25. Are small positively charged particles






26. 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.






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






28. 1. Constructive 2. Destructive






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






30. Substance that dissociates completely into its ions when added to water and conducts electricity well.






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






32. 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.






33. 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






34. The same pathogen must be found in every person with the same disease - the pathogen must be isolated & grown in a culture - when the organism is re - introduced in an experimental animal - that animal should develop the same disease originally seen

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






36. # of protons + # of neutrons






37. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.






38. Metal - nonmetals - & metalliods






39. The process of heat transfer via solid contact






40. Potential & Kinetic






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






42. 1000x the base unit






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






44. Current is measured with a device called...






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






46. The agent most widely and most consistently at work changing the appearance of the Earth's surface






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






48. The buoyant force on an object is equal to the weight of the fluid displaced by the object






49. Meter is the base unit of...






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