Frozen water represents ..... of the water on the Earth's surface
2%
3%
1%
80%
Water has an important role inside the cells of living organisms
False
True
Acid rain leads to the erosion of building facades due to .....
The formation of new fragile compounds
Its descent in large quantities and submerging them
Severe collision with it and its fragmentation
All of the above
Nitrogen gas represents a large part of .....
Hydrosphere
Lithosphere
Atmosphere
Biosphere
... expresses the transfer of water from the soil to the atmosphere through the pores of plant leaves
The process of transpiration
The process of respiration
The process of evaporation
Precipitation
Which of the following layers of the Earth represents the solid part of the Earth ....
when we Adding ammonium chloride salt to water in relation to pH
It hydrolyzes and causes an increase in the concentration of negative hydroxide ions and an increase in the concentration of positive hydrogen ions, making the solution acidic and the pH value less than 7
It hydrolyzes and causes a decrease in the concentration of negative hydroxide ions and an increase in the concentration of positive hydrogen ions, making the solution acidic and the pH value less than 7
It hydrolyzes and causes an increase in the concentration of negative hydroxide ions and decrease in the concentration of positive hydrogen ions, making the solution acidic and the pH value less than 7
It hydrolyzes and causes an increase in the concentration of negative hydroxide ions and decrease in the concentration of positive hydrogen ions, making the solution acidic and the pH value more than 7
Water is not a polar compound
pH of seawater = .........
6.5 : 8.5
6.4 : 7.5
7.5 : 8.4
7.4 : 8.5
The highest percentage of water in the Earth's crust is found in .....
Glaciers and polar regions
Rivers and freshwater lakes
Springs and wells
Seas and oceans
Chemical bonds between the hydrogen atom and the oxygen atom in the water molecule
hydrogen bond
single covalent bonds
Fresh water that is formed as a result of water seeping through the pores of the soil from sedimentary rocks
Bays
Rivers
groundwater
Lakes
All of the following gases, when reacting with water vapor in clouds, form rain that corrodes metal structures except ....
No2
Co2
NH3
So2
...A nearly closed system capable of changing the surface of the earth physically, chemically and biologically through a continuous change between the three states of water
Rain cycle
Water cycle
hydrological cycle
Natural cycle
Acid rain is a rain resulting from the chemical reaction of water vapor in clouds with compounds present in the atmosphere
The main processes involved in the water cycle in nature are ( Evaporation-Condensation- Rain or snowfall)
Water is in the state of ..... at a temperature higher than 100°© and is considered one of the components of the .....
Vapor - water
Vapor - atmosphere
Solid - ice
Liquid - atmosphere
PH of freshwater = ..........
7.5 : 4.5
The biological process that occurs in plants and animals and contributes to the formation of rain is .....
Infiltration
Transpiration
Evaporation
Respiration
Water is present on the surface of the Earth in .....
Three physical states
Two physical states
One physical state
Four physical states
when Acid rain falling on rocks it works to break them up and decompose them.
All of the following lead to an increase in the percentage of water vapor in the atmosphere except ....
The process of rainfall
The process of respiration in plants and humans
The process of transpiration in plants
There is no correct answer
A bond that arises between a water molecule and another water molecule and is responsible for the high boiling point of water
Acid rain reacts with .....
Alkalis
Basic oxides
Basic salts
Acid oxides
There are two main opposite processes in the hydrological cycle, which are
Condensation and freezing
Evaporation and Condensation
Evaporation and snow
Melting and boiling
in the water the electronegativity of the oxygen atom is ........ the electronegativity of the hydrogen atom
less than
greater than
equal
The ratio between the land area to the water area on planet Earth .....
Greater than one
Less than one
Equal to one
The water reservoir that is formed as a result of water seeping through the soil and rocks downwards and some of it comes out in the form of springs is ...
Groundwater
The solution resulting from dissolving sodium bicarbonate salt in water is acid
which of the followings is true
The boiling point of water decreases Because the water molecules are linked to each other by a single covalent bonds
The boiling point of water decreases Because the water molecules are linked to each other by a hydrogen bond
The boiling point of water increases Because the water molecules are linked to each other by a hydrogen bond
The boiling point of water increases Because the water molecules are linked to each other by a single covalent bonds