(Question)
For a given medium such as air, sound has a slower speed at lower temperatures.  Mike wants his voice to travel slowly, so he will speak in a room that is colder or warmer?
(Answer)
colder


(Question)
The more tightly packed the particles inside the material are, the more dense we say they are.  Eric has a soccer ball and kicks it into a rock of roughly the same size. The rock doesn't move and the ball bounces away. The ball is less or more dense than the rock?
(Answer)
less


(Question)
More advanced farming practices allowed a single farmer to grow food for many more people.  As fewer computers have made work harder for people we have had to do more work or less work.?
(Answer)
more work