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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. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat






2. The acceleration of an object depends on the mass of the object and the amount of force applied.






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






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






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






6. 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.






7. It scatters light in many directions






8. Causes motion






9. Number of protons






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






11. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease






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






13. Heat transferred by fluid current






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






15. Meter is the base unit of...






16. The monovalent group - OH in such compounds as bases and some acids and alcohols. Makes the molecule polar which increases the solubility of a compound.






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






18. According to some scientists - the Earth's average surface temperature is rising as a result of the greenhouse effect. An increase in the atmospheric concentration of which of the following gases is considered to be primarily responsible






19. 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






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






21. 1. All are solids having the appearance of metals & non - metals. 2. All are white or gray - but not shiny 3. Conduct electricity - but not as well as metals.






22. Are small positively charged particles






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






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






25. Polar molecules






26. 1000x the base unit






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






28. Nuclear fission - Nuclear Fusion






29. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.






30. # of electrons. Non - metals have 4-8 electrons in their outermost energy.






31. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons






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






33. Alkaline earth metals






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






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






36. 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.






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






38. Potential & Kinetic






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






40. 1/10 the base unit






41. Reflects the light in one direction






42. 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)






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






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






45. All processes cease when temperature approaches 0.






46. # of protons + # of neutrons






47. The more energy the electrons have






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






49. 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






50. Non - metals - group 18 - the most non - reactive elements