Explanation:
If a star is moving toward Earth, its light waves seem to be squeezed together. The decreasing distance between Earth and the star shortens the wavelength of the starlight received by Earth. This shifts the star's spectral lines toward the blue end of the spectrum. If the star is moving away from us, its waves are effectively stretched out when they reach Earth, increasing their wavelength. This shifts the star's spectral lines toward the red end of spectrum. Dark lines in stellar spectra are being caused by absorption of wavelengths of energy by the elements in the star's outer levels. patterns of absorption lines that appear at shorter or longer wavelengths than normal indicate that the star is moving. The greater the shift from the normal position of the lines, the faster the star is moving.
Answer:B
Explanation:
Christopher Columbus introduced horses, sugar plants, and disease to the New World, while facilitating the introduction of New World commodities like sugar, tobacco, chocolate, and potatoes to the Old World. The process by which commodities, people, and diseases crossed the Atlantic is known as the Columbian Exchange.
Answer: <span>B) GERUND
</span>The answer is gerund.
The answer is B!!!!
Just answer that question
Christianity was very important to many ancient people, especially when Constantine decided to make it legal, this this religion promised them salvation in heaven if they acted in certain ways during their time on Earth.
