Science

2) Write the scientific term for the following:

The mass of a unit volume (1 cm3 ) of the substance. (..............................)

A gas used in flying balloons to make them rise up in the air. (..............................)

A liquid used to keep sodium and potassium metals from air. (..............................)

They are metals which find great difficulty in reacting with oxygen. (..............................)

The temperature at which the matter changes from the solid state to liquid state. (...........................)

 The temperature at which the matter changes from the liquid state to gaseous state. (......................).

The smallest part of matter which can be freely existed and it has the properties of matter. (…………………..………) 

. The simplest pure form of matter and cannot analyzed into simpler form. (...........................).

The product results from a combination between two or more atoms of different elements with constant weight ratios. (..............................)

The spaces found between molecules. (............................)

The forces that are found among the molecules. (..............................)

.The compound molecule which is formed of three hydrogen atoms and one nitrogen atom. (..............................)

A molecule consists of one oxygen atom and two hydrogen atoms. (..............................) 

.Gases that their molecules are composed of one atom only. (..............................)

They have definite volumes and indefinite shape. (..............................) 

.The smallest part of the element that can take part in a chemical reaction. (..............................)

.The fundamental building unit of matter. (..............................) 

.Positive charges that are found in the nucleus of the atom. (..............................)

.Electrically neutral particles are found in the nucleus of the atom. (..............................)

.Negatively charged particles of negligible mass revolve around the nucleus. (............................)

It is in the center of the atom. (..............................) 

.Imaginary places in which the electrons can move according to their energies. (............................)

.The number of positive protons in the nucleus. (..............................) 

The sum of the numbers of protons and neutrons in the nucleus of an atom. (..............................)

.The amount of energy lost or gained by an electron when it transfers from one energy level to another. (..............................)

.It is the atom which gains a quantum of energy. (.............................).

.The ability to do work or to make a change. (..............................) 

.The main source for the most energy resources on the Earth. (..............................)

.A kind of energy stored in the food. (..............................) 

.Energy stored in an object due to work done on it. (..............................)

.The work done during the motion of an object. (..............................) 

The summation of potential energy and kinetic energy. (..............................)

The physical quantity results from multiplying the object’s mass by gravity acceleration. (..............................)

.Energy is neither created nor destroyed, but it converts from one form to another. (.....................).

The pollution produced from the networks of wireless transmitters of cellular phones. (...................................)

The pollution produced from car exhaust. (..............................)

A form of energy that transfers from higher temperature to low temperature. (..............................)

The heat condition which determines whether heat transfers from or to an object when it comes in contact with another. (..............................)

The way by which heat transfers through solids. (.............................)

The way by which the heat is transferred through liquids and gases. (..............................)