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Flashcards

H2O!!!

Clara Cat Science 6th grade English 33 cards

H2O!!!

Cards in this deck (33)

  1. 1% of water on Earth's surface70%
  2. 2% of water in bodies60%
  3. 3% of water in blood92%
  4. 4What two atoms make up a water molecule?2 hydrogen and one oxygen
  5. 5With a water molecule, which end has a positive charge and which end has a negative charge?The hydrogen end has a positive and the oxygen end has a negative
  6. 6What is polarity?When the hydrogen and oxygen atoms bond, its molecular structure gives the water molecule polarity (electric charge)
  7. 7Is hydrogen or oxygen more electron greedy?oxygen
  8. 8Water molecules attract to each other because of what?Polarity/hydrogen bonding
  9. 9with hydrogen and oxygen, which attracts to which?Hydrogen always attracts to oxygen
  10. 10Which is stronger, hydrogen or covalent bonds?Covalent
  11. 11What is hydrogen bonding?The bond between two water molecules (bonds because of polarity)
  12. 12What allows water to dissolve many other substances?Polarity
  13. 13How does solubility work with water?The attraction causes the molecules of the new substance to be mixed uniformly with the water molecules.
  14. 14With solubility, what is water known as?The Universal Solvent
  15. 15Which substance has the most solubility and dissolves the most substances?Water! (of course I mean this what most of the unit is about
  16. 16Why is the dissolving power of waiter important?Water carries dissolved chemicals, minerals, and nutrients used to support living things.
  17. 17What gives water a high surface tension?Polarity
  18. 18How does surface tension work?Molecules at the surface of water “stick together” through cohesion to form a type of “skin” on the water.
  19. 19What is cohesion?Water molecules sticking to other water molecules
  20. 20What is adhesion?It causes water to stick to other polar substances
  21. 21What is capillary action?Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.
  22. 22Freeing point (32 degrees fahrenheight) may be lower if what?"Super cooling" occurs, or if there are impurities in the water
  23. 23What is the density of water?1 gram per centimeter cubed
  24. 24What happens to the density of water when it cools and becomes ice?It gets less dense and expands
  25. 25Why is ice less dense than water?The molecules in ice line up to form a very open crystalline structure which is less dense than liquid water.Why is ice less dense than water?
  26. 26Why is it important that ice is less dense than water?If water acted like most other liquids, and was denser when frozen, lakes and rivers would freeze solid and all life in them would die. With ice, the ice floats to the top so that animals can still live under the ice.
  27. 27What is Specific Heat Capacity?Amount of heat one gram of a substance must absorb or lose to change its temp. by one degree C
  28. 28Does water have a low or high Specific Heat Capacity and why?Very high - Water takes a long time to heat and a long time to cool.
  29. 29Does sand have a higher or lower Specific Heat Capacity than water, and how much bigger or smaller?Sand has lower. Water has five times more Specific Heat Capacity than sand!
  30. 301 calorie equals how many joules?4.184
  31. 31Is a sea breeze during night or day?Day
  32. 32Is a land breeze during night or day?Night
  33. 33Why is specific heat capacity important?It regulates the temperature of bodies around the world, and makes sure they don't get too hot or cold very quickly.

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6th grade Science (What Do You Know About H2O Unit) Flashcards on H2O!!!, created by Clara Cat on 03/04/2019.
Created by
Clara Cat · Apr 2019
Updated
Apr 3, 2019
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