(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)
Rougher surfaces have more friction between them than smoother surfaces. Eric rubs together tissue paper and then sandpaper. The rougher tissue paper has less or more friction than the sandpaper?
(Answer)
more

(Question)
Fossils found at the lowest layer of rock would be the oldest, as these would have been buried for the longest time, whereas fossils found closer to the surface would be buried more recently and therefore be younger. Jonathan is digging at a site, trying to uncover old rocks. In order to find the oldest rocks, Jonathan needs to dig deeper or less deep?
(Answer)
deeper