at which point the potential energy of the ball = zero ?

Silver is symbolized by ..........?

in the solar cells, the solar energy changes into.............energy

All the following solutions conduct electricity except……………. Solution

in the car engine the chemical energy changes into………… energy

 heat is transferred through space by …………..

Frogs hide themselves in mud during winter, it is called............

The smell property is a  distinguishing factor between…………

………… is from Teethless mammals

Balloons of festivals are filled with……….gas

From the examples of living organisms that undergo aestivation is…………..

In the simple electric cell,………… energy is converted into electric energy

……………. Is a renewable source of energy

an object of mass 4 kg is moving at the speed of 3 m/sec. , it's kinetic energy = ………..

Birds migration represents………………….. Adaptation

On adding 100 cm³ of water to 100 cm³ of alcohol, the volume of mixture equals ………..

An object has a kinetic energy of 64 Joule and its mass 8 kg , so its speed equals…………….

The plant that reproduces by spores is ……………

Sodium is symbolized by ………….

In cold winter, some animals bury themselves in mud to overcome the decrease in temperature, this is called ……….......................

Chemical energy can be stored in.........................

the energy level(N) is saturated with…………

an object its mass 5kg, It is placed at a height of 1m, and acceleration due to gravity is 10m/s²

thus weight of the object equals………..

The organisms which have four pairs of joined legs are the ……………………

from the substances that float on water is ....................

from animals with soft bodies................

heat transfers by conduction through .............

the attraction force between solids is

taste property distinguish between ...........

electric lamp changes the electric energy into ...................energy

an object its kinetic energy is zero when the object is at the ...................

when the atomic number of an element equals to its mass number, this means that there is no .....................

the attraction force between molecules of gases is .................

chemical energy is changed into heat energy in ......................

television produces ..................

the front limbs of dolphins are modified into ..................

the mathematical formula used to calculate work is ..................

..................is an inactive metal.

.....................is a diatomic liquid element.

from the organisms that can make camouflage ...................

some animals called rodents such as ...........

secretion of sweat in the human is .........................adaptation.

the potential energy of an object at a height 8 meters is 800 joule the weight of that object is ..........newton

as we go further from the nucleus the energy level .......................

when the substance sinks in the water, means its density

we can distinguish between ..............according to the electric conductivity .

the measuring unit of work done is

from teethless mammals ...............

the number of electrons in the outer level of Cl 17 is

cycas belongs to .............

if the nucleus of carbon atom contains 6 protons and 6 neutrons. so the atomic number equals .......in the stable state

.....................is the density of 35 gm of a substance that occupies 25 cm³

the energy in the .................changes from potential energy into kinetic energy and vice versa

.............is an example of the plants which feed on insects

which of the following devices pollutes the enviroment?

equal masses of different substances have ............. volumes

number of electrons that saturates the level N equal .............

substance finds great difficulty to react with oxygen like .............

when pulling a string of an arc the work done to pull it is stored in .................

pea plant belongs to ..............plant

in solar heater , the solar energy converted into ................

the electrons of potassium atom k 19 are distributed in ..............energy levels

the symbol of sulphur is

the attraction force ins very weak in .........

the third energy level in calcium Ca 20 is filled with ..............elecrtrons

an object of mass 2 kg is moving of a speed 8 m/sec has kinetic energy = .....joule

some animals are characterized by an internal and external support as ...........

the bat is considered from ..........that fly

.................is an examples of insects

all of the following are forms of adaptation except.............

the organs of birds that are adapted for feeding are the .................

as an object is launched upwards ,

heat transfers from heater by ............

all of the following are compounds molecules except ................