The importance of Earth's Water Supply =)

THE IMPORTANCE OF WATER

       With two thirds of the earth's surface covered by water and the human body consisting of 75 percent of it, it is evidently clear that water is one of the prime elements responsible for life on earth. Water circulates through the land just as it does through the human body, transporting, dissolving, replenishing nutrients and organic matter, while carrying away waste material. Further in the body, it regulates the activities of fluids, tissues, cells, lymph, blood and glandular secretions.

       An average adult body contains 42 litres of water and with just a small loss of 2.7 litres he or she can suffer from dehydration, displaying symptoms of irritability, fatigue, nervousness, dizziness, weakness, headaches and consequently reach a state of pathology. Dr F. Batmanghelidj, in his book 'your body's many cries for water', gives a wonderful essay on water and its vital role in the health of a water 'starved' society. He writes: "Since the 'water' we drink provides for cell function and its volume requirements, the decrease in our daily water intake affects the efficiency of cell activity........as a result chronic dehydration causes symptoms that equal disease..."

Final test tips

Is you want topast the final test write this tips :

• never in your live copy  beter copy what the teacher say in a notebook fo have studies notes 
• When there are someting in the book like a table or a graphic with information from the topics study them is more easy than read all the day a single topics .
• When the teacher say than something come in the final test it comes .
• Beter to studies a vocabularies word like example .Example when you asking for the gas, liquid,  solid, or plasma  is State of matters
• Something final never but never miss a final test day and I has saying by propert experience .

Have good notes with Finals test tips

Vocabulary#16

desalination = getting fresh wate from seawater .

water cycle = the continuos movemenr of water between earth's surface and the air , changing from liquid to gas to liquid .

groundwater= wate that seeps into the ground into spaces between bits of rock and soil.

water table=the top of the water-filled space in the ground.

aquifer = an underground layer of rock or soil filled with water.

spring = a place where groundwater seeps out of the gound.

well= a hole dug below the water table that water seeps into.

reservoir= a storage area for freshwate supplies .

What is Water

Vocabulary:Earth's Atmosphere

reneawable resource= a resource that an be replaced in a short period of time .

ozone layer=a layer of ozone gas in the atmosphere that screens out much of the Sun's UV rays.

fossil fuel= a fuel formed from the decay of ancient forms og life.

smog = a mixtures of smoke and fog.

zx acid rain = moisture that falls to earth afte being mixed with wastes from buned fossil fuels .

Vocabulary:Earth's Rocks and Soil

rock : a naturally formed solid in the crust, made up of one or more monerals.

igneous rock : a rock formed when melted rock material cools and hadens.

sedimentary rock : a rock made of bits of matter joined together.

fossil: any remains or imprint of living things of the past.

Metamorphic rock : a rock formed under heat and pressure from another Kind of rock .

humus : adding any harmful substances to Earth's land, water, or air .

rock cycle : rock changing from one form into another in a never -ending of processes.

Vocabulary: Earth's Changing Crust

fault:
 a crackin the cust, whose sides show evidence of motion .

Geologist:

a scientist who studies earth .

magma :

hot, molten rock deep below earth's surface .

lava:

magma than reaches earth's surface.

weathering :
the breakimg down of rocks into smaller pieces.

erosion:

the picking up and caying away of pieces of rock .

deposition:

the dropping off of bits of eroded rock.

meteorite:
a chunk of rock from space that strikes a surface (such as Earth o the Moon).

Vocabulary:Matter and Energy

Kinetic energy = The energy of a moving object .

potential energy = energy stoed   in an object or material.ç

conduction = movement of energy from a hot object that comes into contact with a cooler object; the material remains in  place .

convection = movement of energy by the flow of matter from place to place .

radiation= movement of energy  in the fom of waves that can travel through empty space .

wet cell batterry= a battery containing liquid solution that produces the electric current.

dry cell battery = a battery that uses " dry chemicals" to poduce an electic current.

Vocabulary: Chemical Changes

1. physical change =  a change in size, shape, or state, without forming a new substance .

2.chemical change= a change in matter that produces a new substances with  different properties from the original .

3.chemical reaction = a chemical change of original substances into one or more new subtances

4.reactant = one of the oiginal substances before a chemical reaction takes place .

5.product= one of the new subtances produced when a chemical  reaction takes place .

Vocabulary:Mixtures and Solutions

mixture= two or more parts blended together yet keeping their own properties and not turning into a new substance.

solution = a mixture in which substances are completely  blended so that the properties are the same throughout and the substances stay blended.

suspension = a mixtue of substances that separate upon standing .

colloid=particles (or droplets) large enough to block out light spread throughout another substance .

emulsion = a liquid spread through a gas .

aerosol= liquid drops or solid particles spread through a gas .



gel = a solid spead though a liquid .



foam= a gas spread though a liquid or solid .





Vocabulary: Solid, Liquid , and gases

state of matter=any of the forms matter can exist in.

melting point = the temperature at which a solid changes state into a liquid .

boiling point= the temperature at which a liquid changes state into a gas.

freezing point = the temperature at bwhich a liquid changes state into a solid .

Picture

state of matter

melting point

boiling point

freezing point