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






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






3. 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)






4. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.






5. Removal of static electricity by conduction






6. Negatively charged particles found outside the nucleus






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






8. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.






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






10. Several vehicles - initially at a complete stop - begin a long race at the same starting point. The vehicle that has a constant value for which of the following is most likely to win?






11. 1/1000 the base unit






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






13. 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.






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






15. 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.






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






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






18. Resistance is measured in...






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






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


21. 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






22. Is the change from liquid to gas.






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






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






25. 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






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






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






28. Is the work done divided by the amount of the time it took to do it. P= w/t






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






30. Where are protons an neutrons located?






31. Uses the principles of capillary action to separate substances such as plant pigments molecules of a larger size will migrate up the paper more quickly produce lines of pigment. - a process used for separating mixtures by virtue of differences in abs






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






33. Measure of the earth's pull






34. The interference that occurs when two waves combine to make a wave with a smaller amplitude






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






36. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?






37. Concave






38. They are neither precise nor accurate.






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






40. An object's _____ gives it resistance to change its current state of motion it is also the measure of an objects resistance to acceleration.






41. Pressure is measures in a unit called






42. The center of the atom.






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






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






45. Is the path along which electrons flow






46. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.






47. 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






48. They form only over warm oceans






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






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