"Air and water pressure affect our lives every moment of every day. Without them, we couldn't swim across the pool, drink through a straw, breathe in air, or circulate blood through our bodies. We're all under pressure. Without it we couldn't survive!"--Back cover.

"Based on writing from Time for kids."--Title page verso. "Level 5.6"--Back cover. "Word count: 1987"--Back cover.

The pressure of the world --Water pressure -- Water pressure in action -- Air pressure -- Weather -- The power of pressure.