In what century was plastic invented and name TWO common natural materials used before plastic was invented?

Here are the solutions to the questions from the image. Homework 3 1.1.1 In what century was plastic invented? Step 1: Read the provided text to find when plastics were developed. The text states: "The first plastics were developed in the late 1800s and early 1900s." Step 2: Determine the century for "late 1800s". The late 1800s falls within the 19th century. Answer: 19th century 1.1.2 Name TWO common natural materials used before plastic was invented? Step 1: Read the provided text to identify natural materials used before plastic. The text states: