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shusha [124]
3 years ago
10

Joseph found something that he thought was a rock. He dropped the rock and it broke. He noticed that there were small crystals i

nside. Now, he is confused. He asked his dad about his mystery object. What is the correct explanation for the object that Joseph found
Geography
1 answer:
Anna71 [15]3 years ago
5 0

Answer: He found a rock, and the crystals inside are minerals.

Options:

  • He found a rock, and the crystals inside are minerals.
  • He found a mineral, and the crystals inside are rocks.
  • He found a rock, and the crystals inside are rocks, too.
  • He found a mineral, and the crystals inside are made of dirt.

Explanation:

A rock differs from a mineral. While they are both solid, a mineral has a crystalline structure while a rock does not have a specific structure. Rocks are made up of different mineral structures and that is what Joseph discovered on dropping the rock, one of the component minerals in the rock. For example, a type of rock, slate may consist of feldspar, quartz among many other minerals.

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1. What did scientists used to think volcanoes were, and what do<br> they know now?
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Answer:Mount Merapi in Indonesia is expected to erupt at any moment, and Indonesian government officials have begun to evacuate the people living in villages near the volcano. The volatile mountain's last eruption was in 2006, and two people were killed when a plume of scorching gas, rocks and volcanic ash spewed down its slopes, according to the NASA Earth Observatory.

Officials from the island of Java, where Mount Merapi is located, told news sources they predict lava to spill over the southern side of the mountain. Volcanic earthquakes, an increase in seismic activity and swelling of the ground around the volcano have caused Indonesian officials to raise the alert on Merapi to level three, with four being the maximum alert level.

What are the signs that a volcano is about to erupt?

While volcanoes may give off several warning signs they are about to blow, some are taken more seriously by volcanologists, who alert and advise government officials regarding when evacuations need to take place.

"These signs may include very small earthquakes beneath the volcano, slight inflation, or swelling, of the volcano and increased emission of heat and gas from vents on the volcano," said U.S. Geological Survey (USGS) Volcano Hazards Program coordinator John Eichelberger.

"Rising magma causes solid rock to break, sending earthquake signals," Eichelberger told Life's Little Mysteries. "This pushes the ground surface upward, and boils off hot gas that travels ahead of the magma."

The USGS looks for these changes using seismic and GPS networks that surround volcanoes. Radar satellites are also used to detect swelling of the ground by comparing images taken at different times, according to Eichelberger.

Explanation:

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2 years ago
How do air temperatures and air pressure change in the summer season?
Reil [10]
All you have to do is read the first 4 sentences then you will find your answer

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2 years ago
Label the two city-states Athens and Sparta. Turn to the map on page 387 in your book. In what modern country are Athens and Spa
tangare [24]

1. Athens is located in the southeastern part of Greece, while Sparta is located in the southern part of Greece.

Explanation:

Athens and Sparta were both ancient city-states. They were part of the Hellenic world, or ancient Greece as it is more often referred to. The two cities were competitors, and more often than not they were in bad relations than in good ones.

The people from neither Athens nor Sparta referred to them as Greeks, but instead they identified themselves with the city-state they belonged to, thus Athenians and Spartans. These two city-states were very different in their political organization and the way the people lived, with Athens being democracy, but also very restrictive to the women, while the Spartans were a militaristic monarchy, and the women had much more freedom.

Both of these ancient city-states were located on what is now Greece. Athens is in fact the capital of modern day Greece.

Learn more about the relations between Sparta and Athens in ancient Greece brainly.com/question/4470593

#learnwithBrainly

2. The name of the country, Greece, doesn't appear on the map because there was no such country in existence until the mid 19th century.

Explanation:

Contrary to the popular belief, a country named Greece did not existed in the antique period. The country formed and started using this name only in the mid 19th century. Instead of one country in what is now Greece (without Macedonia and Western Thrace), there were multiple city-states, all of which had their own name and identity.

The city-states didn't had one common ethnic identity, but instead the people identified with the city-state in which  they were living in. A term that was used to somewhat describe all of the city-states was Hellenistic, which was based on the language.

This part of the Balkan Peninsula was actually the only one where there were no people that formed a unified country, usually in the form of kingdom. All of the other groups of people on the Balkan had their own kingdoms, such as:

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  • Illiria
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  • Dardania

Learn more about Greek city-states brainly.com/question/10700150

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Answer:

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