a chemical element or substance required in trace amounts for the normal growth and development of living organisms.
Some names are:
Raw cotton - Textiles
Limestoe - Cement
Iron ore - Steel
Bauxite - Aluminium
Wool - Woollen cloth
Soya seed - Soil oil
Mustard seed - Mustard oil
Ground nut - Ground nut oil
Sugar cane - Sugar
Hides and skins - Leather
Naphtha - Petrochemicals
The leaves of the plant compared to the plants around it are bigger because they are being token care of and watered and fed while the others take care of them selves also they are different types of plants :)
a. What is a star's spectrum?
A star's spectrum refers to the <em>"amount of light"</em> that stars they give off according to varying wavelengths. Since we cannot tell the amount of light a star gives off quantitatively from Earth, we can differentiate them according to how bright they appear.
b. Which spectrum is most common in stars?
Stars are classified according to their spectra <em>(elements in the star)</em>. They are classified into 7 types <em>(O, B, A, F, G, K and O). </em>The most common type is M, however, it gives off a dim light.
c. How can it differ from start to star?
Although stars follow a continuous spectrum, the spectra of a star differs from each other because <u>they do not give off the same amount of energy at the different wavelengths. </u>
d. What does the spectrum tell us about the star?
The spectrum can tell the<em> surface temperature</em> of the star. This means that a blue star (we often see it as a white-colored star from Earth) is hotter than that of a yellow star. A red star is considered the coolest star among all.
The spectrum of stars also allows the astronomers to study composition of the stars according to their <em>wavelengths.</em>
