1. By: Haoting Huang

2. Chemicals are liquids that may be harmful or useful. Most chemicals are made to be used to keep bugs away. Many of these chemicals are harmful to humans. These chemicals are called pesticides.

3. Chemicals are used to help humans and to harm humans. Some chemicals are made naturally. Chemicals can be radioactive like radon and radium. These chemicals are represented by these symbols.

4. Some products like cleaning sprays and liquids may contain harmful chemicals that kills germs, but harms humans. It is better to make cleaning products by yourself using baking soda, vinegar, and essential oil.

5. Pesticides are indeed toxic. Pesticides were made to kill bad bugs, but they also killed good bugs. Pesticides can also kill people of the toxic in the mix.