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

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2. Objects are in thermal contact if they can affect each others temperature






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






4. Excess energy is released into the environment






5. Elements in the middle of the periodic table - in groups 3-12.






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






7. Negatively charged particles found outside the nucleus






8. They form only over warm oceans






9. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.






10. Animals in which of the following groups may have a backbone and a spinal cord?






11. Way of keeping tract of valence electrons






12. Average mass of various isotopes of the element.






13. 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.






14. Do not have molecules with one of the two molecular arrangements required to give an odor






15. 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






16. Are small positively charged particles






17. Experiments may not be done on...






18. Nuclear fission - Nuclear Fusion






19. Causes motion






20. 100x the base unit






21. 8 electrons






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






23. The ability of the material to oppose the flow of electrons through it all






24. 1. Liquid crystals - when certain solids melt their crystal lattices disintegrate & their particles lose their 3- dimensional pattern. 2. Solid - as a liquid substance cools & forms a solid. The strong attractive forces between oppositely charges ion






25. 10x the base unit






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






27. Resistance is measured in...






28. Liter is the base unit of...






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






30. 1000x the base unit






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






32. It scatters light in many directions






33. Heat transferred by direct contact






34. Reflects the light in one direction






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






36. Alkali metals






37. 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.






38. A unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure. used by nutritionists to characterize the energy - producing potential in food






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






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






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






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






43. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)






44. Heat absorbed or radiated during a change of phase at a constant temperature and pressure - the amount of heat required to undergo a phase change






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






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






47. The branch of physics that deals with static electricity - study of stationary electric charges.






48. Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.






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






50. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.







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Can you answer 50 questions in 15 minutes?


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