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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. Resistance is measured in...






2. Removal of static electricity by conduction






3. Alkali metals






4. 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.






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






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






7. A compound of which a relatively small amount of the dissolved solute exists as ions in an aqueous solution. Example: Acetic acid - CH3COOH (vinegar)






8. Used in electrical devices that have to function at temperatures too high for metals.






9. Meter is the base unit of...






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






11. Mass of the substance contained per unit of volume






12. Heat transferred by fluid current






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






14. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.






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






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






17. Is done on an object when an applied force moves across a distance.






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






19. Negatively charged particles found outside the nucleus






20. 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.






21. Is a simple device used to indicate the existence of a positive or negative charge.






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






23. The center of the atom.






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






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






26. Consists of frequency (f) - measured in hertz - and wavelength measured in meters - the frequency times the wavelength of every electromagnetic wave equals the speed of light.






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






28. 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.






29. Pressure is measures in a unit called






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






31. Number of protons






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






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






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






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






36. Measure of the earth's pull






37. Polar molecules






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






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






41. The amount of energy that it takes to raise one gram of water one degree celsius.






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






43. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?






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






45. As the velocity of a fluid increases - the pressure exerted by the fluid decreases - The speed of a fluid - liquid - gas - increases the pressure exerts.






46. 1. Constructive 2. Destructive






47. Heat transferred by direct contact






48. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons






49. Potential & Kinetic






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