Water-The wonder liquid Flashcards
What is the most common and important liquid on Earth?
Water
What is the basis of all life?
Water
What does it mean by water shapes the Earths surface?
water runs through river etc and it can shape the river bank and theres alot of water around us.
What is a fundamental part of the climate process?
Water
Where does water come from?
Water comes from rain, rivers, springs, and boreholes.
Who needs water to survive?
Animals, plants, and people need
water to survive.
Where can water be stored?
Water can be stored in tanks, reservoirs, and storage dams.
How can water be used?
Water can be used in many ways:
● To wash ourselves, our clothes, and our utensils.
● To transport people and cargo.
● To irrigate crops
● To cool machinery in factories and industries.
● To drink
● Some plants and animals live in water.
● We use water for recreation, e.g. swimming, diving, skiing, fishing, and surfing.
● To conduct religious rituals.
● To process and dilute waste products.
What is a singular drop of water made of?
A drop of water is made of thousands of very small particles of water.
Explain how the particles in ice,water vapour and water are arranged
Particles in steam are spread widely apart and move quickly. Particles in water are packed more tightly than
particles in steam, and they move slower. Particles in a solid are packed close together and
they do not move very much.
What are waters 3 states?
● Solid – ice
● Liquid – water
● Gas – steam/ water vapour
What are the properties of solid,liquid,gas
Solid-Fixed shape
-Fixed volume
Gas-Fixed volume
-Takes shape of container
Liquid-Takes shape of container
-Free surface
-Fixed volume
What causes a change in state?
Tempreture
Whats speed up the rate of evaporation?
Heat,wind and large surface energy
What is the hydrological cycle?
Water is always circulating in nature. This is called the hydrological cycle. Evaporation
takes place from all bodies of water.Transpiration takes place from all
plant life. The water vapour that rises forms clouds. Condensation takes place in the form of
precipitation, such as rain, snow, sleet, and hail. Percolation (soak-in) then takes place and
the water soaks into the sub-soil, springs, and underground water supplies. The cycle then
begins again.
What is transpiration?
it is the movement of water through all plant life.
What is percolation?
It is the process of water soaking into the ground(subsoil the springs and the underground water)
what is a solute ,solvent and solution?
A solute is the substance dissolved into the solvent.
A solvent is the liquid/non newtonian fluid the solute is added to.
A solution is the the mixture of the dissolved solute and the solvent.
what is soluble and insoluble?
The substances that dissolve in water are said to be soluble. Substances that does not
dissolve in water are said to be insoluble.
Name some soluble and insoluble liquids,solids and gases
● Soluble solids: salt, sugar
● Insoluble solids: Sulphur, sand, chalk
● Soluble liquids: spirits, ink, milk
● Insoluble liquids: oil, paraffin, petrol.
● Soluble gases: that air that we breathe
What are the advantages of water as a solvent?
● Washing and cleansing: Because water can dissolve many substances, it is used
to wash dirt and stains from fabrics, objects, and the human body. Soap and
detergents are used to break up substances that do not dissolve in water, e.g. oil and
fat, into small particles so that they can be washed out more easily.
● Flavouring of food: Substances that we use to improve the flavor of food - e.g. salt,
sugar, flavourings, and spices – dissolve in water and can then spread through the
food. Otherwise, our food would be tasteless. When we make tea or coffee, part of
the tea leaf or coffee bean dissolves in the water.
● Medicine: Many types of medicines which we drink or which are injected are solids
that have been dissolved in water. We often dissolve tablets in water before drinking
them.
● Plant food: Plants absorb the minerals they need through their roots. To enable
them to do this, the salts must be dissolved in water. We say that the plants absorb
the dissolved salts.
● Aquatic life: Animals and plants that live underwater obtain the oxygen they need for
breathing from the air that is dissolved in the water.
What are the disadvantages of water as a slovent?
● The fading of fabrics: dyes that are water-soluble easily wash out of the fabrics.
Such fabrics fade easily and also stain other articles that are washed with them.
● Weathering: Certain minerals in building-stones, building-lime, and plaster slowly
dissolve in rainwater. As a result of this, buildings eventually become weathered.
● Leaching of soil: Rain and irrigation water dissolve the mineral salts in the soil and
wash them away. We say that the soil is leached and it becomes necessary to keep
adding fertilizer.
● Brackish soil: Water does not only remove salt from the soil but can also add too
much salt to the soil. This causes poorly drained soil to become brackish. Plants do
not grow well in brackish soil.
● Hard water: Water in which soap does not lather easily is called hard water. Such
water contains dissolved salts. When hard water is boiled, it forms a “fur” on the
inside of the kettles. This “fur” can block the steam pipes and cause boilers to burst.
A kettle with this “fur” has to be heated for much longer before the water boils.
what do we call the degree to which a substance can dissolve into a liquid
The degree to which a
substance can dissolve in a liquid is called the solubility of the substance.
What does solubility depend on?
● The type of solute
● The type of solvent
● The temperature of the solvent
