Everyday Uses of Solids, Liquids, and Gases

1. Solids:

   • Solids are everywhere, especially in construction.
   • For example, we make over 7 billion tons of concrete every year!
   • Metals like steel are also really important. We produce about 1.9 billion tons of steel every year around the world.

2. Liquids:

   • Water is super important for our lives.
   • On average, a person needs about 3 liters of water every day to stay healthy.
   • In factories, petroleum (a type of liquid) is what helps move things around.
   • Each year, we refine more than 4.5 billion tons of it!

3. Gases:

   • Oxygen is a gas that we need to breathe.
   • It makes up about 21% of the air around us.
   • Carbon dioxide, another gas, is used to keep food fresh.
   • We produce over 1 million tons of carbon dioxide every year to put in drinks like soda.