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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. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.






2. 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?






3. Causes motion






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






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






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






7. Stored mechanical - Nuclear - Chemical - gravitational






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






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






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. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces






12. Is the measure of energy temperature is a measure of the heat in an object.






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






14. Is the change from liquid to gas.






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






16. Which of the following parts of the Sun is easily visible only during a total solar eclipse






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






18. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.






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






20. Is the work done divided by the amount of the time it took to do it. P= w/t






21. Specific gravity is the ratio based on...






22. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.






23. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat






24. Excess energy is released into the environment






25. The device (bell or Build) is an example of a load. A load is a device that uses energy.






26. 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.






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






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






29. Uses sound waves to locate objects and is especially useful underwater the sound waves bounce off the object and are used to assist in location






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. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.






32. 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.






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






34. 1/1000 the base unit






35. The formula F=M/A is a shorthand force equals mass over acceleration. An object will not move unless the force is strong enough to move the mass.






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






37. Higher because it has higher apparent frequency.






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






39. 'An object at rest will remain at rest - and an object moving at a constant velocity will continue moving at a constant velocity - unless it is acted upon by an unbalanced force.' Another name is Law of Inertia






40. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy






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






42. Alkali Metals are the most _____________






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






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






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






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






47. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.






48. Are used in the treatment of cancer b/c they can kill cancer cells. However - if powerful enough they can kill healthy cells.






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






50. Liter is the base unit of...