The correct answer is A. Heliocentric theory
Explanation:
Galileo Galilei was an Italian astronomer, mainly known for his observations that led Galilei to conclude planets revolve around the Sun (Heliocentric theory) instead of the sun and other planets revolving around the Earth (Geogcentrict theory). One of the observations that make Galilei drew this conclusion were telescopic observation of Venus, in this Galieli noticed similar to the moon Venus had different "phases" or changed its size and lighting, which was only possible if the sun was in the center of the solar system and planets revolve around it including the Earth. Thus, that Galileo was Venus changing size proved the Heliocentric theory.
The correct answer is - c. east.
The Appalachian Mountains are located in the eastern part of the United States, and since the Rocky Mountains are in the western part of the country, it puts them east of the Rocky Mountains.
The Appalachians are a very old mountain range, they are dated to about 480 million years ago when they formed during the Ordovician Period. At their peak, these mountains reached heights similar to the Rocky Mountains and the Alps in Europe, but because of the natural erosion they have shrunk and nowadays are much smaller in height.
Cairo is fan-shaped, narrowest in the south, where the river valley is wedged between desert escarpments, and widest in the north, where the valley blends into the delta. Over the centuries the city expanded westward, as a receding river channel left land flood-free. Lining the banks of the Nile River, Cairo is a fusion of ancient. Churches are built atop Roman ruins and skyscrapers rise behind medieval monuments. Egypt's capital is best known for preserving the last of the Seven Wonders of the Ancient World, but the city contains infinite treasures beyond the Pyramids of Giza.
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Our solar system is located in the outer reaches of the Milky Way Galaxy. The Milky Way contains over 200 billion stars. Most of the star's are not visible from Earth. Almost everything that we see in the sky belongs to the Milky Way Galaxy.
Doldrums are caused by solar radiation from the sun. Because of this the sunlight beams warms the air and causes it to rise straight up instead of side to side (horizontally).
