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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. Several vehicles - initially at a complete stop - begin a long race at the same starting point. The vehicle that has a constant value for which of the following is most likely to win?






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






3. 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.






4. 1000x the base unit






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






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






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






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






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






10. Number of protons






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






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






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






14. Potential & Kinetic






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






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






17. 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?






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






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






20. The amount of heat it takes to change a solid to a liquid






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






22. 1/10 the base unit






23. 10x the base unit






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






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






26. An electric circut with a single path






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






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






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






30. 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






31. They are neither precise nor accurate.






32. 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.






33. The agent most widely and most consistently at work changing the appearance of the Earth's surface






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






35. The relationship between voltage - current - and resistance - V=IR






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






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






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






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






40. The sum of the protons and neutrons






41. The difference in electrical charge between two points in a circuit expressed in volt. When an electron goes through a load it does work & loses some energy.






42. 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


43. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.






44. A gelatinous sample of material from a previously unexplored marine environment is thought to be living or to be composed of recently living material. Which of the following would most clearly confirm that the material has a biological origin?






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






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






47. Liter is the base unit of...






48. (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.






49. Is the change from liquid to gas.






50. Reflects the light in one direction