Determine Central Idea and Summarize Practice Test

Read the passage. (1) The printing press revolutionized communication in the 15th century. (2) Before the press, books were copied by hand, which made them costly and uncommon. (3) Gutenberg’s invention allowed books to be produced quickly and cheaply. (4) As a result, more people could learn to read and gain access to education. (5) New ideas spread faster across Europe. Which summary is objective (without personal opinion or judgment)?

Read the passage. (1) Photosynthesis is essential for life on Earth. (2) In this process, plants use sunlight to make sugar that stores energy. (3) Animals get energy by eating plants or by eating animals that ate plants. (4) Photosynthesis also releases oxygen into the air, which humans and other animals breathe. (5) Without this process, many living things would not have enough food or oxygen. Which statement best expresses the central idea?