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






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






3. Transfer of thermal energy with in a fluid. The particles in a fluid transfer the thermal energy from hot areas to cooler areas EX. the warmed up rising air from a heat source such as a fire or electric heater.






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






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






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






7. Resistance is measured in...






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






9. A principle that states that for every action there is an equal reaction in the opposite direction


10. Liter is the base unit of...






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






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






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






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






15. The mechanical energy that a body has by virtue of its position Ex. Stored energy -






16. 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.






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






18. 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 -






19. (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.






20. 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.






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






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






23. Gram is the base unit of...






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






25. 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






26. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator






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






28. The sum of the protons and neutrons






29. They are neither precise nor accurate.






30. Is the path along which electrons flow






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






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






33. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.






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






35. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy






36. All processes cease when temperature approaches 0.






37. The formula F=M/A is a shorthand force equals mass over acceleration. An object will not move unless the force is strong enough to move the mass.






38. Conduction - Convection - & Radiation






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






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






41. Small uncharged particles in the nucleus they are neutral






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






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






44. The device (bell or Build) is an example of a load. A load is a device that uses energy.






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






46. Concave






47. Mass of the substance contained per unit of volume






48. Most directly involved with controlling levels of sugar in blood






49. Excess energy is released into the environment






50. The region around a magnet where the magnetic force is exerted