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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. Inertia is the tendency of any object to resist change in motion. An object at rest tends to stay at rest. An object that is moving tends to keep moving.






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






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






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






5. Way of keeping tract of valence electrons






6. Measure of the earth's pull






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






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






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






10. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.






11. The interference that occurs when two waves combine to make a wave with a smaller amplitude






12. 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






13. Mass & weight are not the ____ quality






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






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






16. Polar molecules






17. 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.






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






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






20. Change from gas to liquid






21. It scatters light in many directions






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






23. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.






24. The more energy the electrons have






25. Harder - denser - have higher melting points & are chemically active.






26. Heat transferred by direct contact






27. 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.






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






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






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






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






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






33. Is the study of the relationship between motion & the forces affecting motion.






34. An electric circut with a single path






35. 10x the base unit






36. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus






37. 8 electrons






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






40. Decibels






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






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






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






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






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. Carbon atom - atomic number 6 - atomic mass 11






47. Potential & Kinetic






48. 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 -






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






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