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






2. P1/T1=P2/T2. States that the pressure of a fixed amount of gas in a fixed volume is proportional to its temperature.

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






4. When measuring the volume of water in a graduated cylinder where does one read the measurement?






5. 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.






6. A principle that states that for every action there is an equal reaction in the opposite direction

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7. 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.






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. The buoyant force on an object is equal to the weight of the fluid displaced by the object






10. Most directly involved with controlling levels of sugar in blood






11. Substance that dissociates completely into its ions when added to water and conducts electricity well.






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






13. The more energy the electrons have






14. Causes motion






15. Shiny - softer & less dense. Mostly chemically active






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






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






18. Electrons that can accept energy from outside sources and move farther away from the nucleus






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






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






21. Concave






22. Excess energy is released into the environment






23. 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.






24. Potential & Kinetic






25. Uses electrical charges of molecules to separate them according to their size the molecules such as DNA or proteins - are pulled through a gel towards either the positive end of the gel box.






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






27. 2 or more substances combine to form a compound EX. A+B -> AB






28. Decibels






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






30. # of protons + # of neutrons






31. 1. nuclear reaction 2. radioactive






32. Alkali metals






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






34. They are neither precise nor accurate.






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






36. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling






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






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






39. Mass of the substance contained per unit of volume






40. Record vibrations in earth & allow us to measure earthquake activity.






41. Higher because it has higher apparent frequency.






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






43. It scatters light in many directions






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






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






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






47. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.






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






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







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Can you answer 50 questions in 15 minutes?


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