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. Change from gas to liquid






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






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






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






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






6. 1/10 the base unit






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






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






9. When you step out of the shower the floor feels colder on your feet than the bathmat. Because heat is ______________ to the floor.






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






11. Alkali metals






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






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






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






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






16. Metal - nonmetals - & metalliods






17. Series circut - Parallel circut






18. Specific gravity is the ratio based on...






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






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






21. Small uncharged particles in the nucleus they are neutral






22. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy






23. 2 or more substances combine to form a compound EX. A+B -> AB






24. The sum of the protons and neutrons






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






26. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).






27. 1000x the base unit






28. Pressure is measures in a unit called






29. Concave






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






31. Decibels






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






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






34. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles






35. 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.






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






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






38. 100x the base unit






39. 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.






40. They form only over warm oceans






41. (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.






42. Lacking affinity for water. Repels water. Non - polar






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






44. Is an atom that has all of its electrons in the lowest possible energy levels






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






46. Excess energy is released into the environment






47. Experiments may not be done on...






48. A buret is used to deliver solution in precisely - measured - variable volumes. deliver one reactant until the precise end point of the reaction is reached.






49. 10x the base unit






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