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. 100x the base unit






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






3. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B






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






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






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






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






8. 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.






9. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.






10. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.






11. Relates pressure & temp. and temp and volume.






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






13. Is a simple device used to indicate the existence of a positive or negative charge.






14. Potential & Kinetic






15. The more energy the electrons have






16. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.






17. Consists of frequency (f) - measured in hertz - and wavelength measured in meters - the frequency times the wavelength of every electromagnetic wave equals the speed of light.






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






19. The transfer of heat by electromagnetic waves is called?






20. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.






21. A boulder is sitting at the edge of the cliff it has which type of energy?






22. The agent most widely and most consistently at work changing the appearance of the Earth's surface






23. The center of the atom.






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






25. They are neither precise nor accurate.






26. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling






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






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






29. All processes cease when temperature approaches 0.






30. Finding that a solution conducts an electric current shows conclusively that the solution...






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






32. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.






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






34. Decibels






35. Heat transferred by direct contact






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






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


38. The molecular weight of a substance expressed in grams - measures the amount of a substance






39. Inclined plane - lever - wheel & axle - pulley.






40. 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






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






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






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






44. Alkali Metals are the most _____________






45. You see your reflection






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






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






48. 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






49. Reflects the light in one direction






50. Change in the apparent frequency of a wave as observer and source move toward or away from each other