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Science semester exam

Naomi S. Science 6th grade Englisch 54 Karten

Karten in diesem Stapel (54)

  1. 1What is an independent variable?The variable that is chosen to be changed
  2. 2What is a dependent variable?The variable that changes because of the independent variable
  3. 3What is matter?What makes up everything
  4. 4What is an element?A type of matter that can be used in solutions and mixtures and can't be broken down
  5. 5An object can have both chemical and physical properties. Give an example of each type and describe the characteristic.A water bottle is a solid, which is a chemical property, and, say it's blue, which is a physical property
  6. 6What is an atom?Tiny particles that make up everything in the universe
  7. 7What do protons and neutrons have in common?They are both in the nucleus of atoms and make up the weight of the atom
  8. 8What do protons and electrons have in common?They both have a positive charge
  9. 9What do electrons and neutrons have in common?They have opposite charges
  10. 10What did Neils Bohr, Rutherford, and Mendeleev do?They discovered things about atoms
  11. 11Where are noble gasses located on the periodic table?On the very right column of the periodic table
  12. 12How would you know how many valence electrons an element has?Depending on the column it is under on the periodic table.
  13. 13What is the most reactive family of metals? What is the most reactive family of nonmetals?Alkali metals, Reactive nonmetals
  14. 14Describe the difference between a covalent and ionic bond. Name an example of each.Ionic bonds are when an atom gives another atom one of its electrons to fill its valence shell. A covalent bond is when 2 atoms share electrons
  15. 15What is the general term for substances that react in a chemical reaction?Reactants
  16. 16What substance is formed after a chemical reaction?Product
  17. 17Horizontal rows on the periodic table are called?Periods
  18. 18Vertical columns on the periodic table are called?Families
  19. 19Where are metals/nonmetals/metalloids located on the periodic table?They are located in the middle of the periodic table
  20. 20What is a metalloid?An element with properties of a metal and properties of a nonmetal
  21. 21What is the law of mass conservation?The mass will not change when a chemical change occurs
  22. 22Name the only liquid metal at room temperatureMercury
  23. 23How do you know an element's oxidation number?It is the charge of its ion
  24. 24What is an oxidation number?The number of electrons an element gains or loses in an ionic bond
  25. 25Why do you need to know an oxidation number?You need to know the oxidation number to find out if the ionic bond is possible with however many atoms you’ll need.
  26. 26Energy is needed to _______ bonds.break
  27. 27Energy is released when bonds arebroken
  28. 28What is the difference between an exothermic and endothermic reaction?Exothermic reactions release energy. Endothermic reactions absorb it.
  29. 29How do bonds form?When atoms share or give away electrons
  30. 30Why do bonds form?So atoms can be stable
  31. 31What are the five general types of chemical reactions? Name each of the reactions that occur.synthesis, decomposition, combustion, single replacement, and double replacement.
  32. 32What is a thermometer?Something that measures the thermal energy in something
  33. 33How does a thermometer work?Mercury rises to the temperature of the thing it is measuring
  34. 34What is conduction?When energy is absorbed into metal
  35. 35What is a thermal conductor?Something that allows heat to be transferred
  36. 36What is an example of a good conductor?A sheet of tinfoil
  37. 37What is an insulator?Something that can not absorb energy
  38. 38What is an example of an insulator?Wood
  39. 39What is convection?When heat is transferred by movement
  40. 40What is an example of convection?If water boils and creates steam
  41. 41What is radiation?The energy released by waves
  42. 42What is an example of radiation?The sun radiates energy by sending waves
  43. 43What does it mean to be cold? About thermal energy content.When the temperature for something is very low
  44. 44What does it mean to be hot?When the temperature for something is very high
  45. 45Describe the transfer of thermal energyIt is transferred by conduction, convection, or radiation
  46. 46What is the upper limit of temperature?142 nonillion Kelvin
  47. 47What is the lower limit of temperature? (in Celsius, Fahrenheit, and Kelvin)Absolute 0
  48. 48What is the phase change from a liquid to a gas? Give an exampleEvaporation-when rain evaporates from a puddle into a cloud
  49. 49What is the phase change from a gas to a liquid? Give an exampleCondensation-when you boil water and the steam creates water on your microwave above the stove
  50. 50What is the phase change from a solid directly to a gas? Give an exampleSublimation- Dry ice
  51. 51What is the phase change from a liquid to a solid? Give an exampleFreezing-you put an ice cube tray filled with water in a freezer, and the water turns to ice
  52. 52What is the phase change from a solid to a liquid? Give an exampleMelting- you leave a popsicle out on a sunny day, and it melts into a liquid
  53. 53Is energy needed for states of matter to change phase? Why or why not?It is needed because matter can not just change phases on it’s own, and it needs temperatures to be different for it
  54. 54What is deposition? Give an exampleWhen the liquid turns to gas without going through a solid

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Flashcards for a chemistry exam
Erstellt von
Naomi S.
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