Supervolcano: Beneath Yellowstone Park

Which statement below is the central idea of the article "Supervolcano: Beneath Yellowstone Park"?

• Yellowstone Park gets millions of visitors each year.

• Yellowstone Park is too dangerous to consider visiting.

• Yellowstone Park is the home of a massive supervolcano beneath the ground.

• Yellowstone Park is home to many different types of animals, fish, and birds.

Why did the author include details about visiting Yellowstone Park?

• To prove to the reader that Yellowstone Park is still a great place to visit.

• To prove to the reader that the dangers of Yellowstone keep people away.

• To prove to the reader that President Ulysses S. Grant is an important president.

• To prove to the reader that there are dangerous gases lurking in the air.

Based on information from the article, what most likely caused the volcano to erupt 640,000 years ago?

• Toxic gases beneath the Earth were suddenly released.

• The geysers and hot springs quit releasing pressure.

• The pressure of the boiling magma beneath the Earth eventually rose to a point of eruption.

• The Yellowstone Volcanic Observatory did not act quickly enough to warn tourists.

Which of the following is NOT a warning sign of a possible eruption mentioned in the article?

• The geyser, “Old Faithful”, may quit working regularly.

• There may be an increase in earthquakes in the area.

• The ground may rise and fall from the pressure.

• The geyser and hot springs may have higher temperatures than normal.

Which statement about the article below proves that Yellowstone Park may still be a place worth visiting?

• Yellowstone National Park sits on top of a giant supervolcano.

• The Supervolcano will likely not erupt, and Yellowstone has so much beauty to see.

• Yellowstone Caldera formed when the volcano erupted 640,000 years ago.

• The park’s hot springs can rise to very dangerous temperatures, so follow the rules.

Which evidence most strongly supports your answer to the previous question?

• A caldera is a large volcanic crater formed when the mouth of the volcano collapses after a major eruption.

• Due to the extreme heat of these springs, recorded as high as 456 degrees Fahrenheit, the park has strict rules for visitors.

• It was named by President Ulysses S. Grant on March 1, 1872.

• Wyoming’s majestic natural attraction is visited by 3.6 million people each year.