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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. 100x the base unit






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






3. Relates pressure & temp. and temp and volume.






4. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX






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






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






7. Conduction - Convection - & Radiation






8. Negatively charged particles found outside the nucleus






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






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






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






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






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






14. 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?






15. The Earth's seasons can be attributed primarily to which of the following in conjunction with its revolution about the Sun?

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16. Heat transferred by fluid current






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






18. Are small positively charged particles






19. The mechanical energy that a body has by virtue of its motion - energy of a moving object.






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






21. Resistance is measured in...






22. Change from gas to liquid






23. 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






24. Alkaline earth metals






25. Carbon atom - atomic number 6 - atomic mass 11






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






27. 1/1000 the base unit






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






29. 8 electrons






30. 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 -






31. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.






32. Rotate at very high speed in order to separate the liquids from the solids. The more dense part of the solution will sediment at the bottom of the test tube. while the lighter material will stay on top. Ex. centrifuge is used to separate blood from b






33. Polar molecules






34. 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.






35. 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.






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






37. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)






38. Removal of static electricity by conduction






39. 1/10 the base unit






40. 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.






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






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






43. The volume of a gas is directly proportional to the temperature of a gas






44. What are the # of protons in the nucleus of an atom called?






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






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






48. Is the change from liquid to gas.






49. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper






50. Alkali Metals are the most _____________






Can you answer 50 questions in 15 minutes?



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