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






2. (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.






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






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






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. Is the path along which electrons flow






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






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






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






10. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.






11. 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.






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






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






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






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






16. Uses percent light absorbance to measure a color change - thus giving qualitative data using quantitative value - measures light intensity as a function of color - or more specifically - the wavelength of light.






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






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






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






20. Conduction - Convection - & Radiation






21. 1/10 the base unit






22. Non - metals - group 18 - the most non - reactive elements






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






24. 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.






25. Liter is the base unit of...






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






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






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






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






30. 100x the base unit






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






32. They form only over warm oceans






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






34. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.






35. Alkali metals






36. Number of protons






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






38. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.






39. Is the change from liquid to gas.






40. 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 -






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






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






43. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.






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






45. Reflects the light in one direction






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






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






48. 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.






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






50. 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







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