Assessing how well one variable predicts another variable is to blank as detecting cause-effect relationships between different variables is to

D) correlational research; experimental research

Explanation:

In correlational research the effect that one variable has on the other is studied without the addition of any external factor by the researcher. The subject is studied in a natural environment.

In experimental research how and why one variable affects another variable is studied. The subject is studied in the presence of various different variables introduced by the researcher.

spare some change and give it to the poor

explanation:

plz : ((

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.