Main Idea #2

The Grand Canyon was carved by the Colorado River over millions of years by the process of erosion. Scientists are unsure of exactly when it began. however, recent research suggests that the river started carving a number of smaller canyons as far back as 70 million years ago. The Grand Canyon as we know it today probably started taking shape around 6 to 7 million years ago. What is the central message of the passage?

The Grand Canyon is incredibly long and deep, but did you know that there is another canyon that is longer and deeper? The record for the longest and deepest canyon belongs to the Yarlung Zangbo Grand Canyon in Tebet. It's over three miles down to its deepest point. That's 17,567 feet to be exact. The Grand Canyon in Arizona is only about six thousand feet deep, about a third of the size of Tibet's canyon. They're actually pretty close in length, but the Grand Canyon is about 30 miles shorter than the 306 mile long Yarlung Zangbo. What is the central message of the passage?

The Grand Canyon Skywalk is one of the most popular tourist attractions at the Grand Canyon. The Skywalk is a glass walkway that hangs out over the canyon. It offers tourists incredible views to the canyon floor four thousand feet below. Open since 2007, it becomes more popular every year. Now, more than a million visitors a year walk across the horse-shoe shaped bridge to take in the wonders below. It has become a must see attraction for many visitors to the area. What is the central message of the passage?

Which sentence does not support the central message of the passage? Which sentence is off topic? In order to make it to school on time, I have to get up at seven o'clock. After waking up, I immediately eat breakfast. Then, I take a shower and brush my teeth. Next, I prepare for lunchtime by making a sandwich. I also have to walk my dog after I get home from school. Finally, I'm ready to grab my backpack and get on the bus!

My favorite season is spring. I love when flowers and trees begin to bloom, and the weather begins to get warmer. The days begin to get longer, so I have more time to spend outside. During spring, the warm weather makes me want to go outside and ride my bike. My bicycle is green.