Lesson summary: Water and life (article) | Khan Academy (2024)

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  • Janet Jeong

    6 years agoPosted 6 years ago. Direct link to Janet Jeong's post “So water is a covalent or...”

    So water is a covalent or ionic bond?

    (50 votes)

    • Matthew Chen

      6 years agoPosted 6 years ago. Direct link to Matthew Chen's post “Water has a polar covalen...”

      Lesson summary: Water and life (article) | Khan Academy (4)

      Lesson summary: Water and life (article) | Khan Academy (5)

      Lesson summary: Water and life (article) | Khan Academy (6)

      Water has a polar covalent bond, in other words, it is covalent but oxygen is more electronegative than hydrogen so it pulls the electrons to it, giving oxygen a slight negative charge and hydrogen a slight positive charge. Good question!

      (153 votes)

  • Tariq Shah Iqbal

    6 years agoPosted 6 years ago. Direct link to Tariq Shah Iqbal's post “What is diffusion and giv...”

    What is diffusion and give some examples

    (23 votes)

    • Erin Rose

      6 years agoPosted 6 years ago. Direct link to Erin Rose's post “Diffusion is a type of mo...”

      Lesson summary: Water and life (article) | Khan Academy (10)

      Lesson summary: Water and life (article) | Khan Academy (11)

      Diffusion is a type of molecular movement that brings water particles from places of high concentration to low concentration. There really are 4 different types. Simple Diffusion, Osmosis, Facilitated Diffusion and Active transport.

      (34 votes)

  • gleesingw0

    5 years agoPosted 5 years ago. Direct link to gleesingw0's post “I think water is a covela...”

    I think water is a covelant bond

    (23 votes)

    • Heather Salvatore

      5 years agoPosted 5 years ago. Direct link to Heather Salvatore's post “Yes, it is a polar covale...”

      Lesson summary: Water and life (article) | Khan Academy (15)

      Lesson summary: Water and life (article) | Khan Academy (16)

      Yes, it is a polar covalent bond. That means that while the atoms are "sharing" the electrons, the oxygen hogs them a bit closer, creating a partial negative charge on that side of the molecule, and a partial positive charge on the Hydrogen side

      (46 votes)

  • Ryunah Kang

    4 years agoPosted 4 years ago. Direct link to Ryunah Kang's post “why is O electronegative?”

    why is O electronegative?

    (19 votes)

    • Hector Pernett

      4 years agoPosted 4 years ago. Direct link to Hector Pernett's post “To say that oxygen is ele...”

      Lesson summary: Water and life (article) | Khan Academy (20)

      Lesson summary: Water and life (article) | Khan Academy (21)

      To say that oxygen is electronegative fails to grasp the whole picture here. This is because ALL elements (except for the noble gases) are electronegative to some degree or other; ELECTRONEGATIVITY IS A PROPERTY OF THE ELEMENT which basically says "how strongly does it attract electrons?"

      An element's electronegativity value is determined by a mixture of different factors, but the general rule is that it increases as you move right and upward across the periodic table. (Copy-&-paste this link for a visual: www.chemteacher.chemeddl.org/joomla/index.php?option=com_content&view=article&id=91)

      So as for oxygen, (which was the subject of your question) it's electronegativity would indeed be one of the highest among all the elements because of where it is positioned in the periodic table (but more specifically because the factors that I alluded to earlier are manifest for oxygen in such a way as to make it such).

      (37 votes)

  • Ahsan Arifeen

    6 years agoPosted 6 years ago. Direct link to Ahsan Arifeen's post “I still don't quite get t...”

    I still don't quite get the meaning of adhesion and cohesion, and the difference between them. Can somebody help me out?

    • Hope.Eliza

      6 years agoPosted 6 years ago. Direct link to Hope.Eliza's post “adhesion is an attraction...”

      Lesson summary: Water and life (article) | Khan Academy (25)

      Lesson summary: Water and life (article) | Khan Academy (26)

      adhesion is an attraction to unlike molecules, and cohesion is an attraction to like molecules.

      (35 votes)

  • sushilthakur25091

    5 years agoPosted 5 years ago. Direct link to sushilthakur25091's post “which property allow soli...”

    which property allow solid ice to flot in liquid water

    (14 votes)

    • Matthew Chen

      5 years agoPosted 5 years ago. Direct link to Matthew Chen's post “One property of water is ...”

      Lesson summary: Water and life (article) | Khan Academy (30)

      One property of water is that it crystallizes when it freezes, that is it arranges itself in a particular formation whenever it freezes. This formation happens to be less dense than its structure when it is in liquid form. It is this property that allows ice to float. Hope this helped!

      (24 votes)

  • Spencer

    9 months agoPosted 9 months ago. Direct link to Spencer's post “im going to fail ap bio i...”

    im going to fail ap bio i dont see the light at the end of the tunnel i have a 69 and its not even the 5th week in school someone pray for me i need help dr kahn tutor me please

    (21 votes)

  • Zachary Rider

    3 years agoPosted 3 years ago. Direct link to Zachary Rider's post “I'd like to know about th...”

    I'd like to know about the different types of bonds, like Sal mentioned Ionic Bonds, Covalent Bonds and Hydrogen Bonds, but what exactly are they?

    (11 votes)

    • Emmerson Sivard

      3 years agoPosted 3 years ago. Direct link to Emmerson Sivard's post “A Covalent Bond is where ...”

      Lesson summary: Water and life (article) | Khan Academy (36)

      A Covalent Bond is where atoms share eletrons, A ionic is an atom steals an eletron from another atom, giving it to the opposite charge, thus the atoms are attracted to each other. A Hydrogen Bond: A weak bond betweeen to molecules resulting from an electrostatic atrraction between a proton in one molecule and an electronegative atom in the other. Hope this helps,

      (20 votes)

  • joseph.2542929

    4 years agoPosted 4 years ago. Direct link to joseph.2542929's post “what exactly is an ion”

    what exactly is an ion

    (7 votes)

    • Swervo@nae_baby

      4 years agoPosted 4 years ago. Direct link to Swervo@nae_baby's post “an electrically charged a...”

      Lesson summary: Water and life (article) | Khan Academy (40)

      an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons, as a cation (positive ion), which is created by electron loss and is attracted to the cathode in electrolysis, or as an anion (negative ion), which is created by an electron gain and is attracted to the anode.

      (14 votes)

  • Monae Kirksey

    4 years agoPosted 4 years ago. Direct link to Monae Kirksey's post “I have a question, what w...”

    I have a question, what will happen if acids, fire and water combine together?

    (11 votes)

    • lilliebet05

      3 years agoPosted 3 years ago. Direct link to lilliebet05's post “Its not as exciting as yo...”

      Its not as exciting as you think it would be. if you put something like lemon juice on a fire, it will most likely go out, same with water. I hope this helps.

      (5 votes)

Lesson summary: Water and life (article) | Khan Academy (2024)

FAQs

What is the summary of water? ›

water, a substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states. It is one of the most plentiful and essential of compounds. A tasteless and odourless liquid at room temperature, it has the important ability to dissolve many other substances.

What is the water answer? ›

Water ( H 2O) is a polar inorganic compound. At room temperature it is a tasteless and odorless liquid, nearly colorless with a hint of blue. This simplest hydrogen chalcogenide is by far the most studied chemical compound and is described as the "universal solvent" for its ability to dissolve many substances.

What is the structure of water Khan Academy? ›

A water molecule consists of two hydrogen atoms bonded to an oxygen atom, and its overall structure is bent. This is because the oxygen atom, in addition to forming bonds with the hydrogen atoms, also carries two pairs of unshared electrons. All of the electron pairs—shared and unshared—repel each other.

How is the structure of water responsible for its unique characteristics? ›

Water molecules are polar, so they form hydrogen bonds. This gives water unique properties, such as a relatively high boiling point, high specific heat, cohesion, adhesion and density.

What is the summary of the water of life? ›

The story concerns three princes whose father is seriously ill. He can only be restored to health by drinking some of the titular Water of Life that comes from a land far away. Even though they have no idea where the Water of Life can be found, the three princes set off in turn to look for it.

Why is water important for life summary? ›

Water helps improve the circulation of oxygen throughout the body. It also plays a crucial role in the digestion of food. The water in the Earth's oceans absorb heat from the sun during the day and help maintain the temperature during the night. Water is an integral part of agriculture.

What is a water article? ›

It is a transparent colorless chemical substance with one oxygen atom covalently bonded to two hydrogen atoms. Water is cycled continuously on Earth through evaporation, transpiration, condensation, precipitation, and other means.

Why does life need water? ›

Liquid water is an essential requirement for life on Earth because it functions as a solvent. It is capable of dissolving substances and enabling key chemical reactions in animal, plant and microbial cells. Its chemical and physical properties allow it to dissolve more substances than most other liquids.

What is water in very short answer? ›

Water is a tiny molecule. It consists of three atoms : two of hydrogen and one of oxygen. Water molecules cling to each other because of a force called hydrogen bonding. It's the reason why water can do amazing things.

Is water dry or wet? ›

Water is wet, in the sense of being a liquid which flows easily, because its viscosity is low, which is because its molecules are rather loosely joined together.

What is the structure of water summary? ›

Water is a simple molecule consisting of one oxygen atom bonded to two different hydrogen atoms. Because of the higher electronegativity of the oxygen atom, the bonds are polar covalent (polar bonds).

Why is water so special? ›

Water is also the best all-around solvent. More solid substances dissolve in water than in any other liquid. Water consists of molecules with the composition H2O (two small atoms of hydrogen and one larger atom of oxygen).

What are the 5 properties of water? ›

These properties include: high boiling and melting points, high specific heat, high surface tension, and the ability to dissolve many substances. These properties allow water to regulate temperature, transport nutrients, and provide a suitable environment for biological processes to occur.

Is water polar or nonpolar? ›

Water is a Polar Covalent Molecule

The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles - a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side).

What are the 7 characteristics of water? ›

Unique properties of water
  • Water is polar. ...
  • Water is an excellent solvent. ...
  • Water has high heat capacity. ...
  • Water has high heat of vaporization. ...
  • Water has cohesive and adhesive properties. ...
  • Water is less dense as a solid than as a liquid.

What is the summary of the book water? ›

In 'Water' by John Boyne, a woman arrives on a small island off the West coast of Ireland and the first thing she does is shave off her shoulder-length blonde hair and change her name. What is she hiding from and what the repercussions be if the locals uncover her true identity?

What is the summary of the poem "Water"? ›

It narrates how the low caste panchamas underwent the hardships and exploitations in the hands of the upper caste people. According to the speaker water is not an insignificant thing because it has a long history of conflict. It created a huge gap between the village and wada.

What is the short summary of going for water? ›

The meaning of this poem is that anyone, no matter their situation in life or the work they're engaged in, can't enjoy nature. Such is demonstrated by the young characters in this six-stanza poem as they joyfully run across a field on an autumn evening to retrieve water.

What is the story the water about? ›

About this film

When corporations take control of our water, they prioritize turning a profit, instead of access to clean, safe, affordable drinking water that we all need to survive. Unsurprisingly, after systems are privatized, water bills are often much higher than government-owned rates.

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