Test your basic knowledge |

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. 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.






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






4. Is the change from liquid to gas.






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






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






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






8. The center of the atom.






9. Resistance is measured in...






10. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.






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






12. Reflects the light in one direction






13. 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.






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






15. The object is further than one focal length from the lens






16. 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.






17. 10x the base unit






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






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






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






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






22. Average mass of various isotopes of the element.






23. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.






24. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.






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






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






27. 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.






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






29. A wave in which the particles move parallel to the path of the wave






30. Excess energy is released into the environment






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






32. Inclined plane - lever - wheel & axle - pulley.






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






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






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






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






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






38. (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.






39. Finding that a solution conducts an electric current shows conclusively that the solution...






40. 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.






41. A circut with two or more resistors where the electricity has more than one path to travel






42. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.






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






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






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






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






47. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases






48. 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






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






50. All processes cease when temperature approaches 0.