<span>A method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.</span>
<u>Answer:</u>
<em>The star is travelling away from the earth.</em>
<u>Explanation:</u>
<em>A star’s temperature largely determines its color. </em>Stars with higher temperature have a bluish color and stars with low temperature appear red in color. But the color of star that we observe from the earth is different from its actual color.
<em>This variation in color is due to Doppler effect. </em>When the movement of a star is towards the earth the frequency shifts to the higher frequency region and when the movement is away from the earth the frequency of the light emitted will shift to the lower frequency region. <em>Color of light depends on the frequency. </em>
The color corresponding to the <em>lower frequency region</em> is red and color corresponding to <em>high frequency region</em> is blue. <em>So when the star moves away from the earth it appears red in color.</em>
The phloem sap of vascular plants that moves through the
phloem; transports nutrients through fungi by hyphae, as a result of turgor
pressure. Hyphae are elongated tube-shaped structures that are like garden
hoses. They also have inflexible cell walls that may be strengthened by punctured
cross-walls which are called septa.
The boiling point of water is c. 100 degrees
