Science Teacher's Almanac by Julia Spencer Moutran. When we work and play on Earth, we are influenced by the pull of gravity.
Gravity actually helps make our jobs easier to perform.
Not so in a spacecraft. Astronauts have found that working in a weightless environment requires more energy. Astronauts working in their spacecraft found that locomotion was more difficult. Bending down to pick up items wasn't as easy as they thought. Straightening themselves back up in a cumbersome space suit added to their difficulty.