Determine Main Idea and Supporting Details Practice Test

Read the passage. Ancient Egypt was an advanced civilization. Egyptians built huge pyramids as tombs for pharaohs. They wrote with symbols called hieroglyphics. Farmers used the Nile River’s floods to water crops and grow food. Egyptian doctors also learned ways to treat sickness and injuries. Which sentence states the main idea?

Read the passage. Thomas Edison helped create many useful inventions. He worked on the phonograph, which could record sound. He improved the electric light bulb so it lasted longer. He also helped build systems to bring electricity to homes and streets. Edison tested many ideas before finding what worked. Which detail does NOT support the main idea that Edison created useful inventions?