The adaptation in the insectivorous plants

The dieonaea is from the insectivorous plants .

It is very important to know that the insectivorous plants are called also the insect-eating plants , the predacious plants and the carnivorous plants .

 

The adaptation and the motion in the mammals

It is very important to know that the mammals move with the different ways as they live in varied environments , So the mammals limbs were modified in many shapes and forms to suit the required ways of movement such as walking , flying , swimming , climbing and diving .

The general properties of the alkaline earth metals in the modern periodic table

 

Alkaline earth metals in the modern periodic table .

It is very important to know that the alkaline earth metals are located on the left side of the periodic table , They are the second group of s-block after group ( 1 A ) .

 

The classification of the arthropods according to the number of the legs

The arthropods

It is very important to know that the arthropods are the invertebrate animals that are characterized by the presence of the jointed legs .

 

The classification of the animals according to the nature of the body supporting

It is very important to know that the animals are classified according to the nature of the body supporting to the soft bodies and the supported bodies .

 

The classification of the plants according to the external shape and their way of reproduction

There are enormous diversity in the living organisms , So , They must be classified into groups to facilitate their studying . We can classify the plants according to the external shape and the way of the reproduction .

 

The effect of the extinction on the ecological equilibrium

It is very important to know that the Ecosystem is everything that related to the living and non-living things existing somewhere , for example the forest , the desert and the sea . In any ecosystem .

The types of the sound waves

 

You should know that there are two types of the sound waves which are the audible sounds and the non - audible sounds .

 

The audible sounds such as the sonic waves , And the non - audible sounds such as the ultrasonic waves and the infrasonic waves .

 

How can the human ear differentiate between the sounds ?

 

The sound waves

It is very important to know that the human ear differentiate between the sounds that reach it through the different factors which are the sound pitch , the sound intensity and the sound quality .

 

The nature and the properties of the sound waves

The sound wave

 

The sound

 

You should know that the sound is an external factor that affects the ear causing the sense of hearing . And it produced due to the vibration of the bodies , and it stops when the vibrating bodies stop their vibration .

 

The importance of the fossils and the suitable conditions for the fossils formation

 

The suitable conditions for the fossils formation

 

It is very important to know that the organism body must be buried immediately after death in a medium that preserves it from the decomposition . The organism must have hard skeleton .

 

The types of the fossils and the ways of formation

 

The Fossils

 

It is very important to know that the fossils are the traces and the remains of the living organisms which are preserved in the sedimentary rocks .

 

The water pollutants and the protection of the water from the pollution

 

 

The water pollution 

 

It is very important to know that the water pollution is the addition of any substance to the water which causes continuous gradual change in the water properties and affects the health and the life of the living creatures .

 

The physical and the chemical properties of the water

 

The physical properties of the water 

 

It is very important to know that the water has a higher melting point , boiling point , and heat of vaporization than most common liquid . This fact indicates that there are strong forces of attraction between the adjacent water molecules .  

 

The importance of the water and its structure

The importance of the water

 

You know that there are no living organisms can live without the water as it is the medium through which all the vital processes take place .

 

You should know that the water in the oceans and the rivers is an important means for the transportation between the cities and the countries .

 

The negative effects of the global warming phenomenon and how to overcome the global warming

The global warming phenomenon

 

You should know that the global warming is caused by the greenhouse effect , And It is the continuous increase in the average temperature of the Earth's near - surface air .

 

The erosion of the ozone layer and the protection from the ozone layer pollutants

The erosion of the ozone layer

 

The ozone hole is a thinning or losing parts of the ozone layer above the south pole .

You should know that the scientists have noticed that there was the erosion of the ozone layer above the South Pole , Since 1978 , And it is known as the ozone hole .

The importance of the ozone layer and its structure

 

You should know that the ozone layer is located at the height from 20 to 40 km above the sea level , And it is located in the lower part of the stratosphere layer , As it is the first layer of the atmospheric envelope which contains a suitable amount of oxygen gas , and it also faces the ultraviolet radiations that emitted from the Sun .

 

The atmospheric pressure maps and the instruments of measuring the atmospheric pressure

The atmospheric envelope of the Earth

 

You should know that the Earth is surrounded by a gaseous envelope known as the atmospheric air or the atmospheric envelope which is a gaseous envelope rotating with the Earth around its axis , and it extends about 1000 km above the sea level  .

 

The matter construction and the properties of the molecules of the matter

 

You should know that the matter consists of very small structural units known as the molecules .

 

The molecules 

 

You should know that the molecule is the smallest part of the matter which  can exist freely , and it has the properties of the matter .

 

The types and the properties of the soil

The types of the soil are the sand soil , the silt soil and the clay soil .

You can see the soil around you , and you will notice the different crops which are planted in the different types of the soil .

 

What are the types of the soil ?

 

You should know that the soil can be classified into three different types according to the kind of the particles ( the components ) that form it .

 

The electric circuits and the methods of connecting the electric lamps in the electric circuits

 

The electric circuits

 

You should know that the electric circuit is known as a closed and continuous path through which , the electricity  will pass making a complete cycle .

 

Metals and non metals and the economic importance of some metals and non metals

Every day , we can see the matter around us which has a mass and a volume . The matter may exist as an element or a compound .

 

You should know that the element is the simplest form of the matter that can not be analyzed into two substances or more .

The energy paths through the living organisms in the food chains and the food webs

 

You should know that there are food relations between all the living organisms .

 

We have known that the living organisms are classified according to their feeding into the producers which depend on themselves to make their food such as the green plants and the green algae .

 

The type of the living organisms according to their feeding

  

You should know that the living organisms are classified according  to their feeding into the producers , the consumers and the decomposers .

What is the difference between the physical changes and the chemical changes ?

The Physical  and the Chemical changes of the matter

You know that the changes that may occur to the matter are the physical changes and the chemical changes .

The movement of the moon and the occurrence of the tide and the ebb phenomenon

At night , When you look at the sky , You see the Moon , It is the satellite of the Earth . It is a dark body , But it seems bright because it reflects the sunlight which falls on its surface . 

 

The movement of the Sun and the Earth

Look at the sky , and you will notice that the Sun rises from the east and sets from the west .

 

You should know that the sunrise and the sunset do not occur due to the rotation of the Sun , but it occurs due to the rotation of the Earth around itself ( its axis ) .

 

The weather factors and the importance of the weather prediction

What is the meaning of the weather ?

 

You should know that the weather is the expected conditions of the atmosphere at a certain area during a short period of time , not exceeding one week .

 

The components of the Earth's atmosphere and the importance of them

Do you know what is the Earth's atmosphere ?

 

You should know that the Earth's atmosphere is composed of a mixture of the different gases that make the life on the Earth possible .

 

The forms of the energy and their changes

 

If you  look around you , You will notice that every thing needs the energy to do their functions . You need food to obtain the energy that helps you to work ,  move , play , .....etc .

 

Your car needs the fuel to obtain the energy that causes the motion of its engines . 

 

The advantage and the disadvantage of friction and the ways to decrease the friction

The friction force helps us to walk  .

Do you know what is the meaning of the friction ?

 

You should know that the friction force is the force exists between  the two  surfaces when they touch each other and it affects in the opposite direction of the movement . 

 

The soil pollution and the soil protection from pollution

The pollution is very dangerous , and you should know that there are different kinds of pollution as the air pollution , the water pollution and  the soil pollution , The pollution is any change in the environment that disturbs its natural balance .

The sources of energy and their importance

We have known that the Sun is the main source of energy , and it is very important in our life .

 

But you should know that there are resources of energy which are the renewable sources of energy and the non renewable sources of energy . 

 

What is the importance of the Sun ( solar energy ) ?

The Sun is very important in our life .

Do you see the Sun in the sky in the morning everyday ?

 

Do you know the importance of the Sun ?

 

Everybody know that the Sun is the main source of the  energy on Earth .

 

The types of the levers and the importance of each of them

The levers

 

People use the levers but they do not know the type of them and how to determine the type of any lever .

 

Do you know that the levers are classified according to the location of the effort force , the resistance force and the fulcrum ?

 

The structure and the importance of the levers

 

The levers are very important in our life to perform tasks more easily .

The levers are the most common simple machines which they help man to perform heavy tasks easily . They were first described in 260 B.C .

 

Observing the space and the invention of Telescopes

 

Galileo used lenses to collect light in his telescope .

Who was the first scientist who made astronomical telescope ?

 

" Galileo " was the first scientist who made an astronomical telescope in 1609 . It was made from lenses to collect light in his telescope . 

 

Uses of fluorescent lamps and their structure

 

fluorescent lamps are used in lighting houses and shops .

There are different types of electric lamps , but the most popular of these lamps are  Fluorescent lamps and light bulbs   .

 

Fluorescent lamps are type of lighting lamps known as neon lamps , but the inert neon gas is not used inside its glass tube .

 

Uses of light bulbs and their structure

 

Light bulbs ate used in lighting houses .

Electric lamps are tools that convert the electric energy into light energy by passing the electricity through them .

 

There are different types of electric lamps , but the most popular of these lamps are light bulbs and fluorescent lamps .

 

The volcanoes and the safety precautions must be taken at the occurrence of the volcanoes .

Lava ( lava flows ) are molten materials mass that spreads on the volcanic sides .

There are thousands of volcanoes on the Earth's surface . But sixty one only of them are active as an evidence of the permanent activities and movement beneath the Earth's crust . 

Earthquakes and safety precautions must be taken at the occurrence of earthquakes

Earthquakes are rapid and successive shakes of the ground which take place one after the other . 

 

Every day , the Earth's crust is exposed to nearly 400 earthquakes . actually we do not feel them , but the seismic and remote sensation detecting centers record and track them .

Mechanical waves and some technological applications of sound mechanical waves

 

Do you know that Mechanical waves  are waves which propagate through a material medium ( solid , liquid , or gas ) at a wave speed which depends on the  properties of that medium ?

 

Examples and some technological applications of electromagnetic waves

 

Light , microwaves , x - rays , TV and radio transmissions are all kinds of electromagnetic waves .

Electromagnetic waves are formed when an electric field couples with a magnetic field . The magnetic and electric fields of an electromagnetic waves are perpendicular to each other and to the direction of the wave .

 

The lunar eclipse and safety precautions on observing the lunar eclipse

 

Do you know that The lunar eclipse occurs when the Sun , Earth and the Moon are nearly on one straight line with the Earth in the middle hiding the sunlight from the Moon  ?

 

Do you know that the lunar eclipse occurs in the middle of the lunar month ( the moon phase is full moon )  at a rate of two lunar eclipses per year ? .

 

The types of the solar eclipses and safety precautions on observing the solar eclipse

 

The solar eclipse phenomenon occurs when the Moon passes between the Sun and the Earth casting its shadow on the Earth's surface , where the moon ,the Earth and the Sun are nearly on one straight line with the moon in the middle . 

 

The solar system and the milky way galaxy

The galaxy that our solar system belongs to is known  as " The way of chopped hay galaxy " or " The Milky Way galaxy " It takes an oval shape with coiled spiral arms extend from it , the Sun lies on one of these spiral arms . The solar system consists of the Sun , the Planets , the Moons , the Asteroids , the Meteors , the Meteorites and the Comets .

 

Benefits and dangers of electricity

 

You should know that electricity is very important in our life . Everyone needs electricity . We can not imagine our life without it , So it also has benefits and dangers . We must know how to deal with it .