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






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






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






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






5. 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






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

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7. The sum of the protons and neutrons






8. Ratio of the density of a substance to the density of water






9. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system






10. Metal - nonmetals - & metalliods






11. Way of keeping tract of valence electrons






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






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






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






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






16. 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






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






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






19. 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?






20. 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.






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






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






23. Measure of the earth's pull






24. 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.






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






26. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.






27. Have properties in between metals and non - metals found in groups 13-16






28. 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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29. Change from gas to liquid






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






31. Relates pressure & temp. and temp and volume.






32. 1000x the base unit






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






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






35. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.






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






37. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.






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






39. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease






40. The acceleration of an object depends on the mass of the object and the amount of force applied.






41. You see your reflection






42. Higher because it has higher apparent frequency.






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






44. Group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts






45. The process of heat transfer via solid contact






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






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






48. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.






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






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