Main Idea

What was the purpose of the Civil Rights Act of 1964?

• It made poll taxes illegal.  

• It made Jim Crow laws illegal.

• It ended segregation in schools.

• It allowed African Americans to run for public office.

It's hard to imagine what things were like before there was money, but such a time did exist. During these times people exchanged goods using the barter system. The word barter means to trade. People using the barter system traded things instead of buying and selling them. So if you were a rice farmer, you would trade your rice with many people to get all the things that you wanted or needed. Unfortunately, the people from whom you needed things might not want your rice. Isn't it nice to just go to the store and buy candy instead of having to trade rice for it? Summarize this paragraph in one sentence. Be specific and clearly explain the main idea.

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Yellowstone National Park is mainly located in Wyoming, although three percent is located in the state of Montana. The Continental Divide of North America runs diagonally through the southwestern part of the park. The park sits on the Yellowstone Plateau, which is an average elevation of 8,000 feet above sea level. This plateau is bounded on nearly all sides by mountain ranges. There are 290 waterfalls that are at least fifteen feet in the park, the highest being the Lower Falls of the Yellowstone River, which falls 308 feet. Summarize this paragraph in one sentence. Be specific and clearly explain the main idea.

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Do you ever remember your dreams? You may not remember what you dream, but you probably dream every night—almost everyone does. Why do you have dreams? Scientists disagree on exactly why you dream. Some say it is your brain’s way of processing things. You learn a lot and have a lot of things happen to you, so while you sleep, your brain processes that information. Dreaming might be the way your brain makes sense of what happens to you. Some say that dreams are the way your brain solves problems. Suppose you are upset about something. Dreams may be a way for your brain to help you feel better. People may not agree on why you dream. But everyone agrees that dreaming is very important. You need to dream so that your brain is ready for the next day

• How to fall asleep

• Where to find a good bed

• How many hours of sleep you need

• Dreams

When another old cave is discovered in the south of France, it is not usually news. Rather, it is an ordinary event. Such discoveries are so frequent these days that hardly anybody pays heed to them. However, when the Lascaux cave complex was discovered in 1940, the world was amazed. Painted directly on its walls were hundreds of scenes showing how people lived thousands of years ago. The scenes show people hunting animals, such as bison or wild cats. Other images depict birds and, most noticeably, horses, which appear in more than 300 wall images, by far outnumbering all other animals. Early artists drawing these animals accomplished a monumental and difficult task. They did not limit themselves to the easily accessible walls but carried their painting materials to spaces that required climbing steep walls or crawling into narrow passages in the Lascaux complex. Unfortunately, the paintings have been exposed to the destructive action of water and temperature changes, which easily wear the images away. Because the Lascaux caves have many entrances, air movement has also damaged the images inside. Although they are not out in the open air, where natural light would have destroyed them long ago, many of the images have deteriorated and are barely recognizable. To prevent further damage, the site was closed to tourists in 1963, 23 years after it was discovered.

• Wild Animals in Art

• Hidden Prehistoric Paintings

• Exploring Caves Respectfully

• Determining the Age of French Caves

Weather reporters have to give out a lot of information. That's why they use pictures. The pictures help them tell us about the weather without using so many words. Weather reporters need to know where the cold air is. They need to know where the warm air is. They have to know where it is raining and what types of clouds are in the area. Their reports need to be correct, but they also need to be short. The pictures help weather reporters get the information out in a fast way. Which sentence best describes the main idea of the paragraph?

• Weather reporters need to know where the cold air is

• Pictures help weather reporters get information out in a fast way

• Their reports need to be correct, but they also need to be short

• They have to know where it is raining and what types of clouds are in the area

Steel is a very important metal which is used for many things. In the United States, the automobile industry uses the most steel. Steel is used in putting up buildings, in making cans and containers, and in making farm and factory machines.

The main idea is:

• The auto industry is the most important.

• The United States produces the most steel in the world.

• Steel is used for many purposes.

What is the main idea of the barter system as described in the passage?

• People traded goods instead of using money.

• Rice was the most valuable commodity.

• Bartering was more efficient than using money.

• Candy was a common trade item.

What is the main idea of the paragraph about Yellowstone National Park?

• Yellowstone is located entirely in Wyoming.

• The park has many waterfalls and high elevations.

• Yellowstone is known for its wildlife.

• The park is famous for its geysers.

What is the main idea of the passage about dreams?

• Dreams are a way for the brain to process information.

• Dreams are not important for brain function.

• Everyone remembers their dreams.

• Dreams are caused by external factors.