• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Water and its importance to living things

Extracts from this document...

Introduction

Water and its importance to living things Think of what it is you need to survive...Water. Water is essnetial to life itself. Without water life on earth would not exist. It is a major importance to living things, in some organisms up to 90% of their body weight derives from water, the brain is composed of 70% water, and 60% of the human body is water and up to 70-95% of the mass of cells is water. It also provides an enviroment for organisms to live in, 75% of the earth is covered in water. Water is a simple molecule made up of an oxygen atom and two hydrogen atoms, H2O. A pair of electron is shared between an oxygen atom and a hydrogen atom, These electrons are not shared equally, the oxygen has a slight negative charge and the hyrdogens have a slight positive charge. This leaves an unequal charge of distribution, known as a dipole. ...read more.

Middle

In condensation reactions water is the main ingredient, where water is removed from molecules to bond them together. This occurs with many sugars and carbohydrates. Hydrolysis is used as mean of splitting up moilecules. It is essential to animals and plants, this is because it allows them to make use of stored food, which are in long chains. Water molecules are highly cohesive because of the hyrdrogn bonds between the molecules. This property of water allows plants to pull up water through xylem vessels from the roots to the leaves. The water molecules that meet the air will be tightly held together and the water molecules below them form an elastic film known as the surface tension. Water has strong hydrostatic forces, because of this water is incompressible. This is supportive for soft bodied creatures such as worms and slugs, both of which do not have a skeleton. Cells that are filled with water become turgid and because of water being incompressible plants can support themselves. ...read more.

Conclusion

Waters Physical Properties * It is unique because it is the only natural substance that is found in three states, liquid, slid and gas. * Unusual because its solid form is lkess dense then the lquid form, which is why ice floats. * Can absorb alot of heat energy before it gets hot. This is why it is valuable in industries and in car radiators as a coolant. But u r now i cant be myslefwitr * Has a very high surface tension, in other words it is sticky and elastic and tends to clump togetherin drops rather than out in a thin film. Surface tension is good for capillary action. This allows water to move though roots of plants and thorugh the tiny blood vessels in our bodies. After doing this i have found out that, even though a weater molecule seems to be very simple and has a structure not so complex as others, it has many specila properties and without these special properties and funcxtions we would not be able to live on this planet. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. The effects of organic effluent from the seweage on the biodiversty in a freshwater ...

    However, since greater volume is due to runoff, high flows such as the ones in Ashby usually have high turbidity due to erosion of the land in the watershed. Runoff from urban areas also usually washes a large amount of metals and oils from city streets and parking lots onto streams.

  2. The Importance Of Water To Living Organisms

    A solid placed in an average liquid may dissolve, and if not, float or sink. However in occasional cases, such as water, an intermediate result is achieved where the solid becomes finely dispersed as particles throughout the liquid. Some molecules have strong intramolecular forces that prevent their solution in water

  1. Germination lab _ siddharth nair

    * Add water everyday into the samples so that the inorganic ions get dissolved in it. However, the same amount of water should be added into each sample everyday. * If the tissue is placed in layers, make sure that no seed is dropped below the topmost layer of the tissue.

  2. The Importance of Water to Living Organisms

    This is because (as discussed earlier), much of the energy is needed to break the magnitude of hydrogen bonds prevalent in the water, which restrict the mobility of the water molecules. This means that temperature variances are minimised due to the high specific heat capacity.

  1. Water's Chemical Properties.

    The two pairs associated with covalent bonds (see chemical bond) holding the hydrogen atoms are drawn together slightly, resulting in the angle of 105� between these bonds. This arrangement results in a polar molecule, since there is a net negative charge toward the oxygen end (the apex)

  2. Monitoring the activity of a living organism.

    Additional light-trapping pigments, enzymes (organic substances that speed up chemical reactions), and other molecules needed for photosynthesis are also located within the thylakoid membranes. A chemical in plants called chlorophyll uses sunlight to convert carbon dioxide and water into carbohydrates and oxygen.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work