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






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






3. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.






4. The sum of the protons and neutrons






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. Meter is the base unit of...






7. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.






8. (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.






9. 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.






10. Uses the principles of capillary action to separate substances such as plant pigments molecules of a larger size will migrate up the paper more quickly produce lines of pigment. - a process used for separating mixtures by virtue of differences in abs






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






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






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






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






15. Gram is the base unit of...






16. 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.






17. Experiments may not be done on...






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






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






20. 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 -






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






22. Is the change from liquid to gas.






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






24. 1/10 the base unit






25. A carbon atom linked by a double bond to an oxygen atom. - c=o.






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






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






28. # of protons + # of neutrons






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






30. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles






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






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






33. 100x the base unit






34. Small uncharged particles in the nucleus they are neutral






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






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






37. 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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38. Where are protons an neutrons located?






39. 2 or more substances combine to form a compound EX. A+B -> AB






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






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






42. Measure of the earth's pull






43. 1. Liquid crystals - when certain solids melt their crystal lattices disintegrate & their particles lose their 3- dimensional pattern. 2. Solid - as a liquid substance cools & forms a solid. The strong attractive forces between oppositely charges ion






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






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






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






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






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






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






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