Nitrogen gas represents a large part of .....
Biosphere
Atmosphere
Lithosphere
Hydrosphere
in the water the electronegativity of the oxygen atom is ........ the electronegativity of the hydrogen atom
equal
greater than
less than
The solution resulting from dissolving sodium bicarbonate salt in water is acid
True
False
Water has an important role inside the cells of living organisms
The biological process that occurs in plants and animals and contributes to the formation of rain is .....
Transpiration
Respiration
Infiltration
Evaporation
Which of the following layers of the Earth represents the solid part of the Earth ....
Water is not a polar compound
Water is present on the surface of the Earth in .....
Two physical states
One physical state
Three physical states
Four physical states
All of the following gases, when reacting with water vapor in clouds, form rain that corrodes metal structures except ....
NH3
No2
So2
Co2
...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
The ratio between the land area to the water area on planet Earth .....
Greater than one
Less than one
Equal to one
Frozen water represents ..... of the water on the Earth's surface
80%
3%
1%
2%
when Acid rain falling on rocks it works to break them up and decompose them.
Water is in the state of ..... at a temperature higher than 100°© and is considered one of the components of the .....
Solid - ice
Liquid - atmosphere
Vapor - atmosphere
Vapor - water
pH of seawater = .........
7.4 : 8.5
6.4 : 7.5
7.5 : 8.4
6.5 : 8.5
... expresses the transfer of water from the soil to the atmosphere through the pores of plant leaves
The process of respiration
The process of transpiration
Precipitation
The process of evaporation
when we Adding ammonium chloride salt to water in relation to pH
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 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
The main processes involved in the water cycle in nature are ( Evaporation-Condensation- Rain or snowfall)
Chemical bonds between the hydrogen atom and the oxygen atom in the water molecule
single covalent bonds
hydrogen bond
There are two main opposite processes in the hydrological cycle, which are
Melting and boiling
Evaporation and snow
Evaporation and Condensation
Condensation and freezing
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
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 increases Because the water molecules are linked to each other by a single covalent bonds
The boiling point of water increases Because the water molecules are linked to each other by a hydrogen bond
The boiling point of water decreases Because the water molecules are linked to each other by a hydrogen bond
Fresh water that is formed as a result of water seeping through the pores of the soil from sedimentary rocks
Bays
groundwater
Rivers
Lakes
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
Acid rain is a rain resulting from the chemical reaction of water vapor in clouds with compounds present in the atmosphere
PH of freshwater = ..........
7.5 : 4.5
Acid rain reacts with .....
Basic salts
Alkalis
Basic oxides
Acid oxides
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
The highest percentage of water in the Earth's crust is found in .....
Seas and oceans
Springs and wells
Glaciers and polar regions
Rivers and freshwater lakes
A bond that arises between a water molecule and another water molecule and is responsible for the high boiling point of water